Dokumentvorlage Handbuch (Style)

Sunny Boy

Technical Description

Edition 4.1

SWR 700 and SWR 850

The String Inverter for Photovoltaic Plants

SWR700-14:EE0698

Sunny Boy Technical Description

SWR700-14:EE - 2 - SMA Regelsysteme GmbH


Alteration Review

Document-Number SWR700

Version and Alteration

Review1)

Comments Author

-12:EE1296 2.0 A First Edition

-13:EE1497 3.0 C Extension to SWR 850

-13:EE3397 3.1 C Recommendation for fuses

Modification of parameter lists

-14:EE0698 4.0 C

1) A: Alterations due to faulty documents or improvement of the documentation

B: Alterations maintaining full or upward compatibility

C: Alterations limiting or excluding compatibility

Name Date Signature

Release



Explanation of Symbols (used in this Document)

To enable you to make optimal use of this manual and safe use of the device during

commissioning, operation and maintenance, please not the following description of

symbols.

This symbol indicates a fact the non-observation of which may cause a

loss of comfort or an impairment of the function.

Example: “Do the following in order to keep the string voltage free“.

This symbol indicates a fact the non-observation of which may lead to da-

mages of parts or to the endangering of people.

Example: “Disconnect the AC and DC cabling before opening the device“.

This symbol indicates an example.



Content

1 Review......................................................................................................................7

1.1 General Information...........................................................................................7

1.2 Who Should Read Which Chapters?.................................................................7

1.3 What to do in Case of Transportation Damages................................................8

2 System Description...................................................................................................9

2.1 Function of a Mains-Connected Solar PV Plant ................................................9

2.2 Key Component Inverter ...................................................................................9

2.3 The String Inverter SWR 700 and SWR 850 ...................................................11

2.3.1 Design......................................................................................................11

2.3.2 Mains Disconnection Device ....................................................................13

2.3.3 Diagnosis and Communication.................................................................16

3 Installation ..............................................................................................................18

3.1 Placement of the SWR 700 resp. SWR 850....................................................18

3.2 Delivered Mounting and Installation Parts .......................................................20

3.3 Device Installation ...........................................................................................21

3.3.1 General Information .................................................................................21

3.3.2 Mounting Preparations .............................................................................21

3.3.3 Wall Mounting ..........................................................................................22

3.4 Electrical Conntection......................................................................................22

3.4.1 General Information .................................................................................22

3.4.2 Connecting Preparations..........................................................................23

3.4.3 Cable Connection.....................................................................................31

4 Putting into Operation.............................................................................................41

4.1 General Information.........................................................................................41



4.2 Before the First Switching On..........................................................................41

5 Operation and Failure Display ................................................................................43

5.1 Operation Display............................................................................................44

5.2 Failure Display.................................................................................................46

6 Technical Data........................................................................................................52

6.1 SWR 700.........................................................................................................52

6.2 SWR 850.........................................................................................................58

7 Sunny Data.............................................................................................................63

7.1 General Information.........................................................................................63

7.2 Data Transmission ..........................................................................................63

7.2.1 Data Transmission via Mains Lead ..........................................................63

7.2.2 Data Transmission via Separate Data Line ..............................................64

7.3 Diagnosis and Communication........................................................................67

7.4 Graphical User Interface using MS Windows ..................................................68

8 Guaranty Regulations and Liability .........................................................................69

9 Enclosures..............................................................................................................72

9.1 Supplement 1: Certificates for SWR 700.........................................................72

9.2 Supplement 2: Certificates for SWR 850.........................................................76

9.3 Supplement 3: Boring jig .................................................................................80



1 Review

1.1 General Information

With the Sunny Boy (SWR 700 resp. SWR 850), you have purchased the technically

most advanced inverter for the mains connection of photovoltaic plants at present. The

SWR 700/850 complies with all VDEW (Vereinigung Deutscher Elektrizitätswerke) regu-

lations -Regulations for the Parallel Operation of Private Generating Plants with the Low

Voltage Grid of the Power Utility. This includes the compliance of the SWR 700/850

with the regulations of the Berufsgenossenschaft der Feinmechanik und Elektrotechnik

regarding the "Automatic Disconnecting Device for Private Generating Plants" (The

certification is included in the supplements). Furthermore, the SWR 700/850

complies with the relevant harmonized European regulations according to the EMVG

(EMI Regulations) and therefore has a CE conformity certificate (v. supplements).

Presently you are reading the Technical Description of the Photovoltaic Inverter SWR

700 resp. SWR 850 (Sunny Boy), and you are probably surprised at its size. Don't

bother, you do not have to read all chapters; this Technical Description shall provide all

necessary information concerning function, installation, and operation of the inverter as

well to the installer as to the user, and it shall give some hints regarding the extension of

solar plants.

1.2 Who Should Read Which Chapters?

Reading this manual is necessary mostly for the installer, because the inverter starts

automatically, without any user action. This Technical Description contains important

information concerning the installation and the putting into operation of the device, besi-

des other topics. In any case, the installer should read at least chapters 3 to 6 of this

description carefully before starting to work, and chapter 8, Guarantee Regulations and

Liability.



The user should read at least chapters 1 and 5. As an aid for fast finding the desired

information, we recommend to read the following chapters.

Installer: Chapter 1, chapter 3, chapter 4, chapter 5, chapter 6,

chapter 8

User: Chapter 1, chapter 2, chapter 5, chapter 7, chapter 8

1.3 What to do in Case of Transportation Damages

Before delivering our products, we thoroughly check their orderly state.

Transportation damages may occur in spite of the good packaging, which, by the way,

can be recycled. In most cases the carrier is responsible for these.

Please examine the delivered string inverter thoroughly. In case you find any packing

damages suggesting inverter damages, or in case you even find damages or deficien-

cies of the inverter itself, please inform the carrier immediately.

If necessary, your distributor or the company SMA will support you. In any case, a notifi-

cation of damages must be submitted to the carrier in writing within six days from the

receipt of the goods.



2 System Description

The reduction of CO2 and other power generating emissions polluting the environment

becomes more and more pressing. Regenerative power generation can be an important

contribution to this. Especially the direct conversion of solar radiation to electric power

(Photovoltaic) has an eminent, worldwide importance.

2.1 Function of a Mains-Connected Solar PV Plant

The DC generated in a solar generator is converted by a so-called "Mains Connection

Device" or "Inverter" to mains-conforming AC, and is supplied directly to the household

mains, which in turn is connected to the public power supply grid.

In the house it supplies all connected electricity consumers (household appliances,

lamps, etc.). In case of insufficient solar power supply, additional power is automatically

taken from the public grid to secure the operation of all connected devices. Surplus solar

power not needed in the household is supplied directly to the public grid, and is made

available for other electricity consumers in this way.

2.2 Key Component Inverter

The DC from the solar cells must be converted to mains-synchronous AC, before it is

supplied to the household mains connected with the public grid. The string inverter con-

nects only a small number of solar modules in series to the public grid (this is called a

string). In this way, even quite large solar generators can be composed from many small

strings, each equipped with a string inverter of its own. The interconnection resp. power

collection takes place on AC side. This means that the expensive DC distribution of for-

mer photovoltaic plants can be omitted, and that additional planning is nearly not neces-

sary any more for the installation of such plants.



The string inverter to be installed for this purpose should meet the following re-

quirements:

• High efficiency, especially in the partial load range

• Microprocessor-equipped operation control for automatic working point opti-

mization of the solar generator (Maximum Power Point Tracking)

• Personnel protection (avoidance of dangerous contact voltages) during instal-

lation and operation

• Operation in accordance with the regulations of the power utilities

• Avoidance of reactive power (phase shift between current and voltage) and

harmonic currents

• Fully automatic operation

• Simple installation (One-Man installation, standard terminals, etc.)

• Low investment

• Modularity for later plant enlargement

• User information concerning the most important operating states via integrated

LEDs

• Automatic failure diagnosis and indication via LEDs

• Simple solar generator design, simple cable layout

• Transmission of measured values and operating states via mains lead to a PC

The string inverter SWR 700 resp. SWR 850 ideally meets the above mentioned requi-

rements.



2.3 The String Inverter SWR 700 and SWR 850

The experience from more than 3,000 mains-connected photovoltaic plants in Germany

in the power range from one to some hundreds of kilowatts have shown that the system

installations in PV plants with central inverters come up to 50 % of the plant expenses.

To significantly reduce these system costs - i.e. expenses for cabling on DC side, for the

inverter, and for the distribution on AC side - and to drastically simplify the installation of

photovoltaic plants were the starting points for the development of the string inverter

SWR 700. Later on the SWR 850 followed.

In cooperation with the Institut für Solare Energieversorgungstechnik (ISET) and the

Institut für Elektrische Energietechnik (IEE) of the University Gesamthochschule Kassel,

SMA Regelsysteme GmbH has developed a modular system, the basic unit of which is

the string inverter SWR 700 resp. SWR 850.

The string inverter SWR 700/850 is a consequent improvement, based on the rich ex-

perience of SMA with photovoltaic mains connection devices. To give some numbers,

SMA has built more than 20 MW installed inverter power, which means more than 6000

devices with a power from 1000 W up to 500 kW.

With the string inverter SWR 700/850, a new, significantly simpler and less expensive

system technology for the mains connection of photovoltaic plants will prevail.

2.3.1 Design

A simple, absolutely robust construction with high efficiency and extreme availability

characterizes the power unit. The photovoltaic DC is converted via a MOSFET bridge

circuit in an intermediate AC circuit with high frequency (20 kHz). From there the supply

to the mains is carried out directly via a ring core transformer. The nominal power of the

SWR 700 is dimensioned for the series connection of up to 10 PV modules (36 to 40

cells each). Regarding the PV generator power to be connected, the SWR 700 can be

re-configured so that even low PV generator power can be connected;



the SWR 850 can only be operated in one voltage range. In all cases, the PV modules

are getting wired using the simple series connection.

Fig 2.1: Block diagram of the string inverter SWR 700 resp. SWR 850

The control of the supplied current via a one-chip computer guarantees absolutely sinu-

soidal curve shapes and extremely low distortion. The operation control serves for fully

automatic operation and the MPP-tracking. Unneccessary losses during idle as well as

feeding operation are avoided.

The heat dissipator is so large that the nominal power of the SWR 700 can permanently

be supplied, even in environments with high ambient temperatures (e.g. installation di-

rectly under the roof). In spite of generous dimensioning of the heat dissipator of the

SWR 850 the supervision of the heat dissipator's temperature is integrated that means

the SWR 850 decreases the power in case of inadmissible temperatures.

Besides the pure operation control, there is the possibility to put out data and to receive

commands and data. This makes the Sunny Boy universally applicable: As well as au-

tonomically working single device as in the frame of a large PV plant, the operation of

which is to be be supervised and evaluated from one center.



The mains is getting supervised by two parallely working, independent one-chip micro-

computers; it fully complies with the new supply regulations of the VDEW and the em-

ployers' association (mains impedance measurement, disconnection device). This me-

ans that the Sunny Boy can be connected to the household mains nearly everywhere in

the house. The result is simplest installation.

The SWR 700 has a metal case with the protection type IP65. This high protection type

and the extended temperature range make possible the installation at any place (loft,

outdoors, etc.).

Even for small PV plants, personnel protection is a vital feature: The galvanic separation

of mains and PV generator, and the supervision of insulation are a proven conception

for this. Of course, the German resp. European regulations concerning electro-magnetic

induction (EMI), harmonic distortions, etc. are met so that the device can be used

without problems all over the world.

2.3.2 Mains Disconnection Device

This chapter deals with the safe mains disconnection of inverters in case of a public grid

disconnection on side of the utility. This means that an absolute protection of electricians

and other workers must be guaranteed in case the utility disconnects a part of the public

electric grid, e.g. for maintenance works. For this purpose, a new protection concept

exists, proposed by the employers' associations, which has become part of the VDEW

regulations in 8/94.

The string inverter SWR 700 resp. SWR 850 (Sunny Boy) is only to be used in parallel

operation with the mains. For safe disconnection during mains disconnections etc., and

to avoid isolated operation, the SWR 700 as well as the SWR 850 are equipped with an

automatic disconnection device as standard.



This device is an "Automatic Disconnection Device for Household Generating

Plants with a Nominal Power ≤ 4.6 kVA with One-Phase Parallel Supply to the

Public Supply Grid via Inverter".

Important is that the automatic disconnection device consists of two independent devi-

ces for mains supervision, each equipped with a disconnector, connected in series for

maximum protection. This device permanently supervises the quality of the connected

grid via checking its voltage, frequency, and impedance. The redundant design and an

automatic self-test before each connection to the mains guarantee its safe function.

Whilst earlier disconnection devices did only check the voltage of the interconnected

three-phase mains, the new conception mainly uses the mains impedance resp. the

mains impedance alterations in the one-wire mains (feeding phase) as a measured va-

lue for disconnection. In addition, voltage and frequency in the one-wire mains are also

checked. If the mains impedance alters by a certain value in a certain time (_ ZAC ≥ 0.5

Ω), or if it exceeds a maximum value (ZAC ≥ 1.75 Ω), the inverter will be disconnected

from the mains within 5 s.

Equally, the inverter must not be connected to the mains if a maximum impedance value

is exceeded (ZAC < 1.25 Ω).

In case the mains voltage exceeds or falls short of certain values (-15/+10 % UN), the

disconnection from the mains must take place within 0.2 s.

Frequency deviations above a certain range (± 0.2 Hz at UN -30/+15 %) must equally

cause a mains disconnection within 0.2 s.

The new conception realized in the SWR 700/850 reaches maximum safety. Never-

theless, the installation expenditure for the owner of a solar plant is drastically reduced,

because now a one-phase connection of the inverter suffices.

The basic concept of the mains disconnection device is based on measuring the grid

impedance (internal resistance of the public supply grid) besides voltage and frequency.



The grid impedance is measured by every Sunny Boy just at the place where it is con-

nected to the mains.

The measured grid impedance is composed from the impedance of the public grid and

the mains impedance in the house (from the house connection to the SWR 700/850). A

high grid impedance increase caused by the connection lead to the SWR 700/850 must

therefore be avoided.

We recommend not to exceed an impedance increase of about 0.5 Ω due to the con-

nection lead between house connection and SWR 700 resp. SWR 850 (further notes

are given in chapter 3.4.3.2, Mains Connection).

The VDEW regulations prescribe a type test, which must be carried out by the inverter

manufacturer at a qualified testing authority. Furthermore, the manufacturer has to

check the function of the mains disconnection device of every unit before delivery. For

the user of a solar plant this means that no time-consuming disconnection test by the

utility and the installer is necessary at the site, and the formerly prescribed repeated

tests are cancelled.

The decisive arguments for the omission of repeated tests are the redundant design and

the recurring self-test of the disconnection device. During every new mains connection

the orderly function of the mains supervision is to be checked, and it is to be guaranteed

that the appertaining switching devices (transistor bridge, relay) are working and able to

disconnect the load circuit. In case of a negative test result, the complete self-test will be

repeated. If the negative result occurs again, the disconnection device has to be che-

cked by a specialist. That's why the operation will be locked in this case, which will be

indicated to the user via lighting the failure LED (yellow) and switching off the operation

LED (green). This operation state will be recorded, and cannot be left via simple swit-

ching operations from the outside (signals via the serial interface, resetting the internal

computers, switching off and on the device, etc.). This makes sure that only authorized

specialists can unlock the device for feeding action after testing the disconnection devi-

ce.



In short the new mains disconnection conception realized in the SWR 700/850 stands

out for the following features:

• Maximum safety

• Simpler and less expensive installation (one-phase)

• No expensive single device test for the user

• No repeated tests needed

2.3.3 Diagnosis and Communication

The conception of modular PV system technology leads to a spatially distributed place-

ment of string inverters SWR 700/850. A simple and fast function check via status and

measured value monitoring of each SWR 700 resp. SWR 850 is offered optionally; it

takes place centrally on a PC using the Windows-program Sunny Data.

The signal transmission between the PC and all inverters takes place via the existing

mains leads (by using a power line modem integrated in the SWR 700/850) so that no

additional signal lines are necessary. The communication supports the following functi-

ons:

• Continuous acquisition of operation data of all connected string inverters and

their PV module groups

• Supervision of operating states and failure indication

• Online measured data transmission from one selectable SWR 700/850

• Identification of faulty strings

• Graphical representation of the data of one SWR 700/850, or comparison of the

data of several ones



Communication and further processing takes place on a PC, which is connected to the

string inverters via a small plug-in modem (can be plugged in any 230 V socket). The

PC can be connected at any place, because it gets its data "from the socket".

The comfortable PC program Sunny Data from SMA offers you a fully graphical user

interface and all features of Windows. In this way Sunny Data makes available the most

comfortable interface you can get today.



3 Installation

The installation of a SWR 700/850 must be carried out by authorized

specialists. The installer must be licensed by the local power utility.

Please read the chapter "Installation" carefully.

All relevant security regulations, the technical connection regulations

of the responsible power utility, and the VDE regulations (resp. compa-

rable regulations) have to be observed.

The SWR 700/850 - Sunny Boy - is a highly integrated electronic device,

therefore sensitive to humidity within its case.

If a SWR 700 is installed outside, the air humidity must not be extreme-

ly high, especially it must not rain into the case during installation, be-

cause the air moisture would remain in the device after closing the ca-

se, which might lead to damages due to condensation on electronic

parts.

3.1 Placement of the SWR 700 resp. SWR 850

When planning a PV solar plant, the question of where to locate the inverter(s) is defini-

tely of some importance. In the following you will find some criteria, which may help you

in this decision.

Basically, the SWR 700/850 is designed for wall mounting on even ground.



Criteria for device mounting:

• Due to the high protection type IP65 the installation is possible as well indoors

as outdoors.

• If possible, do not expose the inverter to direct moisture despite IP65.

• Minimization of the line length (DC cabling) to the solar generator.

• Electric connection to the household mains possible at any place. (Caution! Ta-

ke heed of the mains impedance at the connection point, v. chapter 2.3.2 and

3.4.3.2)

• Avoid the installation in the living area, because low noise emission is possible.

• Avoid the mounting on resonant parts (e.g. thin wooden panels, plaster panels,

etc.).

• Take heed of accessibility for installation works and later servicing.

• Installation in eye-height makes possible to simply read the operating indicators

(LEDs).

Please note the following points in any case:

The mounting ground must be firm.

The ambient temperature must not fall short of resp. exceed -25 oC and

+60 oC.

Do not expose the string inverter to direct sunlight (if necessary install a

shading roof).

A minimum distance of 200 mm is to be kept to other devices, cupboards,

ceiling, etc.

The free air circulation around the case must not be obstructed.

If installing the SWR 700 resp. SWR 850 in a switch cabinet etc., the air



circulation must be sufficient for heat dissipation.

The heat dissipator can reach a temperature of more than 60oC.

3.2 Delivered Mounting and Installation Parts

In the following you will find a list of components making possible the easy mounting and

installation of a SWR 700/850; they are included in the extent of delivery:

1 Boring jig (for a scheme of the boring jig v. fig. 3.1)

5 Screwings PG 13.5

3 Blind screwings PG 13.5

6 Counter-nuts PG 13.5

Fig. 3.1: Boring jig scheme



3.3 Device Installation

3.3.1 General Information

The SWR 700/850 is to be mounted on firm ground by means of three mounting straps.

Three fixing screws and respective dowels are needed for this, which are not part of the

delivery extent; they have to be sufficiently dimensioned. We recommend 6 mm hexa-

gonal screws and 8 mm dowels.

In case of outdoor installation use non-corroding screws. We also re-

commend to use plastic sleeves and washers between screws and

mounting straps to avoid enamel damages, because such damages

might lead to rust.

3.3.2 Mounting Preparations

The wall mounting of the Sunny Boys is carried out using three mounting straps on the

backside of the device, a diagram is shown in the following figure 3.2.

Abbildung 3.2: Wall mounting, side view



Mounting straps: The upper two mounting straps serve for

suspension, the lower one in the middle,

which is partially visible, serves as hang-out

protection.

Hang-out protection of the

SWR 700/850: After hanging the SWR 700/850 onto the

upper screws, screw in the lower one for

hang-out protection.

3.3.3 Wall Mounting

• Mark the boring holes using the boring jig.

• After drilling the holes and putting in the dowels, screw in the upper two holding

screws till they stand out about 4 mm.

• Hang the device onto the holding screws.

• Now protect the SWR 700/850 against hang-out by screwing in the lower screw.

• Check the firm suspension of the device.

3.4 Electrical Conntection

3.4.1 General Information

After the SWR 700 resp. SWR 850 is mounted it can be connected electrically.

The terminals of the solar generator and of the mains connection are both located in the

lower part of the string inverter.

Six openings in the bottom of the case are available as cable lead-ins, fitting for PG 13.5

screwings.



3.4.2 Connecting Preparations

Remove the case lid; for this purpose the four allen screws (5 mm) on the front side ha-

ve to be removed.

On the inner side of the lid there is a flat plug connector with a yellow-

green protective earth wire. This plug is to be removed cautiously.

• Now you see before you the open connection area. You should make yourself

familiar with the three terminal areas. Equally you will find the mains fuse and

the jumpers for PV input voltage range adaptation.

− Solar generator terminals, disconnection terminals for the solar ge-

nerator (in the lower left area) - v. fig. 3.3

− Mains terminals

(in the lower middle/right) - v. fig. 3.3

− Mains fuse

(in the lower middle/right) - v. fig. 3.3

− Adaptor terminals for PV input voltage adaptation (only SWR 700)

(in the lower right) - v. fig. 3.3

− Jumpers for PV input voltage adaptation (only SWR 700)

(on the circuit board in the upper right) - v. fig. 3.3

− Varistors with thermic monitoring

(in the lower left) - v. fig. 3.3



Fig. 3.3: Terminals in the connection box of the SWR 700 resp. SWR 850, fuse and

jumpers

3.4.2.1 Setting the PV Input Voltage Range (only SWR 700)

The SWR 850 can only be operated in the upper voltage range of 125 ...

250 V DC. Therefore the following chapter is not relevant to it.

The PV inverter SWR 700 was developed for a nominal output power of 700 W from

about 10 PV modules (36 to 40 cells) connected in series. This corresponds with the

inverter input voltage range of 125 to 250 V DC.

For solar generators with less than 10 PV modules in series there is the possibility to

adapt the PV input voltage range of the Sunny Boy respectively, so that strings with 8 or

even 6 modules (each with 36 to 40 cells) can also be connected to the Sunny Boy. This

corresponds with PV input voltage ranges of 100 to 200 or 75 to 150 V DC.



The reduction of the input voltage causes a reduction of the nominal power

of the SWR 700 to the respective degree, e.g.:

− 100 to 200 V DC results in a nominal output power of 560 W

− 75 to 150 V DC results in a nominal output power of 420 W

Under certain circumstances the SWR700 must be adapted to the

number of PV modules in a string resp. to the PV input voltage. This is

carried out by means of the adaptor terminals and two jumpers located

on the circuit board. Ex works the Sunny Boy is adapted to a range

from 125 to 250 V.

Adaptor terminals

A black-coated wire must be connected to that one of the three terminals which cor-

responds with the suitable input voltage range.

Jumpers

Several jumpers are located in the upper right of the circuit board. The two jumpers un-

der the designation 150 V and above the designation 200 V are responsible for the cor-

rect adaptation of the SWR 700 to the respective PV input voltage range.

3.4.2.1.1 125 ... 250 V PV input voltage range

Ex works this is the range set in a SWR 700




You have to carry out the adaptation by means of the adaptor terminals and the jum-

pers.

Adaptor terminals

Unfasten the lower black-coated connection wire from terminal 3 and connect it to ter-

minal 2 (v. fig. 3.4). Push a suitable screwdriver into terminal 3 (v. fig. 3.5) until the wire

comes off. Remove the wire. Now push the screwdriver into terminal 2 to open it. Put in

the connection wire and remove the screwdriver. Check whether the wire sits fast.

Fig. 3.4: Adaptor terminals: Selecting a PV input voltage range of 100 ... 200 V DC

Fig. 3.5: Handling the adaptor terminals (screwless cage tension spring terminals



Jumpers

• For this input voltage range the jumper below the 150 V designation has to be

removed (v. fig. 3.6). This is done by simply pulling out the small plug.

• The jumper above the 200 V designation must not be removed.

Fig. 3.6: Jumpers: Jumper configuration for the PV input voltage range of

100 ... 200 V DC




You have to carry out the adaptation via the adaptor terminals and the jumpers.

Adaptor terminals

Unfasten the lower black-coated connection wire from terminal 3 and connect it to ter-

minal 1 (v. fig. 3.7). Push a suitable screwdriver into terminal 3 (v. fig. 3.5) until the wire

comes off. Remove the wire. Now push the screwdriver into terminal 1 to open it. Put in

the connection wire and remove the screwdriver. Check whether the wire sits fast.

Fig. 3.7: Adaptor terminals: Selecting a PV input voltage range of 75 ... 150 V DC



Jumpers

• For this input voltage range the jumper above the 200 V designation has to be

removed (v. fig. 3.8). This is done by simply pulling out the small plug.

• The jumper below the 150 V designation must not be removed.

Fig. 3.8: Jumpers: Jumper configuration for the PV input voltage range of

75 ... 150 V



3.4.2.1.4 Setting the PV input voltage ranges - an overview

(only SWR 700)

Fig. 3.9: Connection diagram of PV input voltage ranges, adaptor terminals, and

jumpers



3.4.2.2 Cable Lead-In

Six openings with the size PG 13.5 in the bottom of the device are intended for leading

the cables into the connection space of the SWR 700 resp. SWR 850. Normally, one

cable lead-in is used for the mains lead, and two or four for the plus and minus wires

from the PV solar generators (strings).

• You need two lead-ins if the complete string is already pre-connected.

• You need four lead-ins if the string is distributed to two partial generators. This

might be useful regarding safety considerations (v. also chapter 3.4.3.1).

• Now insert the necessary PG screwings into the device and fasten these with

one counter-nut each from the inner side of the device.

• Close the remaining lead-ins with one blind screwing each.

3.4.3 Cable Connection

3.4.3.1 Solar PV Generator Connection

To guarantee maximum safety from dangerous contact voltages in PV

plants, neither the plus nor the minus lead are electrically connected to the

protective earth, i.e. they are galvanically separated (via transformer) so that

normally no dangerous electric potential exists between the plus resp. minus

wire and earth potential.



The value of electrical resistance between the plus or minus lead and the earth potential

is monitored permanently by the SWR 700 resp. SWR 850. In case a resistance of 500

kΩ is fallen short of, the red LED will be lit as a warning (v. chapter 5.2, Failure Display).

Please note that the measuring circuit for insulation monitoring establishes an electric

connection between the plus and minus connections and the earth potential. Due to the

very high internal resistance of the measuring circuit (Rm ≥ 1 MΩ), a dangerous contact

voltage resulting from this can normally be excluded. Nevertheless, high-resistance

voltmeters will therefore display a voltage between the case of the SWR 700 and the

plus resp. minus lead.

The electric potential between the plus and the minus wire is danger-

ous to life. It is identical with the PV generator or string voltage.

We recommend the following procedure to keep the string voltage small du-

ring mounting and installation, and so to minimize the risk:

Divide the string to be connected to the SWR 700/850 in two electrically parted genera-

tors of identical size, which are connected in series to form one total string not before all

other installation works at the SWR 700/850 are finished. This means that you have to

lead four cables (two plus and two minus wires each with relatively low voltage poten-

tials) instead of two cables (one plus and one minus wire with high voltage potential) into

the SWR 700/850.

The voltage of one partial string may also exceed 120 V DC.



Solar generator with 10 modules in series

The number of modules can vary according to type of module.

Fig. 3.10: Diagram of complete string connection and partial string connection of e.g.

10 PV modules



Solar generator connection terminals and disconnection terminals

The terminal block for the PV solar generator contains three disconnection terminals

and six connection terminals (v. fig. 3.11).

Never open the disconnection terminals under load, this means that

they must never be opened during feeding action of the inverter. Al-

ways disconnect the mains before opening the disconnection termi-

nals.

In any case disconnect the two disconnection terminals and the cou-

pling terminal before connecting the PV generator lines.

Fig. 3.11: Solar generator connecting terminals and isolating terminals for a solar

generator

The disconnection terminals are located on positions 1, 5, and 9 (counted from the left).

The disconnection terminals in position 1 and 9 have the function of a "main switch", this

means that the left disconnection terminals (position 1) disconnect the plus lead and the

right disconnection terminals (position 9) disconnect the minus lead. The disconnection

terminal in the middle (position 5) takes over the function of "coupling the two partial ge-

nerators.



− left and right disconnection terminal→main switch

− middle disconnection terminal→couples the partial generators

− At first, open the disconnection terminals "main switch" and

"coupling". This can be done by inserting a screwdriver from below

into the orange plastic inset and pushing the inset forward/upward.

Note concerning the cage tension spring terminals

The cable connection terminals (position 2, 3, 4, 6, 7, and 8) are cage tension spring

terminals. Wires with a sectional area of up to 4 mm2 can be inserted. The connection is

carried out by pushing a suitable screwdriver into the terminal until it opens and the wire

can be put in (v. fig. 3.12). Flexible wires (strand) do not need end sleeves.

Fig. 3.12: Handling the solar generator and mains connecting terminals (screwless

cage tension spring terminals)

3.4.3.1.1 Connection of one total string (full string voltage, max.

250 V DC)

The middle disconnection terminal (position 5), "coupling" is not used.

− At first connect the plus lead.



− Lead the plus cable of the string through the appropriate cable screwing

into the connection area of the SWR 700/850. Connect the plus wire to the

plus terminal (position 2).

− Lead the minus cable of the string through the appropriate cable screwing

into the connection area of the SWR 700/850. Connect the minus wire to

the minus terminal (position 8).

− Screw fast the cable seal of the PG screwing.

− Check the fast fit of the connections.

Fig. 3.13: Connecting scheme with a complete string (full string voltage, 10 modules

here only as example)

3.4.3.1.2 Connection of two partial strings (series connection, par-

tial string voltage, both strings in series max. 250 V DC)

Begin with the plus lead:

− Lead the plus cable of partial string 1 through the appropriate cable scre-

wing into the connection area of the SWR 700/850. Connect the plus wire

of partial string 1 to the plus terminal (position 2).

− Lead in the minus cable of partial string 1 and connect it to the minus ter-

minal (position 4).



− In the same way you connect the plus wire of partial string 2 to the plus

terminal (position 6).

− After this connect the minus wire of partial string 2 to the minus terminal

(position 8).

− Screw fast the cable seal of the PG screwing.

− Check the fast fit of the connections.

Fig. 3.14: Connecting scheme with 2 partial strings (series connection, partial string

voltage, 10 modules here only as example)

3.4.3.1.3 Parallel Strings

In the development of the string inverter SWR 700 resp. SWR 850 we have made all

efforts to consider even future developments in the PV module technology. Due to the-

se, the SWR 700/850 is capable of accepting a higher input current than that of present

standard modules.

This has lead some owners to connect two strings in parallel to one SWR 700 resp.

SWR 850. Because this connection variant is possible on principle, the connection

scheme is described in the following. The connection has to be carried out similar to the

one-string variant described above.



Fig. 3.15: Parallel connection with two complete strings (full string voltage, 10 modu-

les here only as example)

Fig. 3.16: Parallel connection with 2 strings distributed to 2 partial generators each

(series connection, partial string voltage, 10 modules here only as example)



3.4.3.2 Mains Connection

The mains connection of a SWR 700 resp. SWR 850 has to be carried out with three wires (L, N, PE).

We recommend to use for the electric circuit (line protection element) a 16 A

(if possible, also a 10 A) fuse NEOKIT from the company Linder or a m.c.b.

with D- or K-characteristic. The relevant regulations (among others as to se-

lectivity) have to be met depending on the local conditions.

In order to meet the supply connection conditions as to ENS (v. chapter 2.3.2, Mains disconnection device [ENS]) the impedance value of the inverter should be smaller than

1 Ω under any circumstances.

The impedance value consists of system impedance at the incoming main

feeder box and all resistance values of all further mains and clamping points.

Remark: The resistance values of a main, e.g.

20 m, 1.5 mm2correspond to approx.0.48 Ω

or 35 m, 2.5 mm2correspond to approx.0.50 Ω

The mains connection terminals are designed for wires with a sectional area of up to 4 mm2.

• Check whether the device and the mains line is dead (no voltage) before you

lead in the mains cable.

• Lead in the bare lead and connect the wires one after the other (PE first, N, L).



The connection terminals are cage tension spring terminals, they can be opened by

pushing in a suitable screwdriver (v. fig. 3.12).

• Check the fast fit of the wires.

• Screw fast the cable seal of the PG screwing.



4 Putting into Operation


After all electrical connection works are carried out, the SWR 700 resp. SWR 850 can

be switched on for the first time.

• Please check that no objects are laid down on the case of the SWR 700/850

during operation.

A heat dissipator is located on top of the SWR 700/850, which can have a

temperature of more than 60 oC. Caution, danger of burning.

4.2 Before the First Switching On

Before you switch on the device for the first time, check the correct polarity of the con-

nection of the PV solar generator for your safety:

• In case the connected string is divided in two partial strings, first connect the

"coupling" disconnection terminal (position 5).

• Now check the correctness of the solar generator voltage at the plus terminal

(position 2) and the minus terminal (position 8) with a voltmeter.

• If the measurements show the correct polarity, you can connect the "main

switch" disconnection terminals (positions 1 and 9).



• Now shut the device by carefully mounting the front lid with four allen screws.

Do not forget to connect the yellow-green protective earth lead (PE) via

its flat plug to the inner side of the lid before mounting it.

Check the fast fit of the lid seal.

Do not forget to connect the yellow-green protective earth lead (PE) via

its flat plug to the inner side of the lid before mounting it.

Check the fast fit of the lid seal.

• Switch on the mains.

If the input voltage suffices, the Sunny Boy will start its fully automatic operation, and will

feed solar power to the mains depending on the solar radiation.

In designing the Sunny Boy we have taken heed of keeping the internal consumption as

low as possible, nevertheless it internally consumes a maximum of 4 W, which are

supplied by the solar generator.

Please note that the solar generator is 'loaded' even in case of very low solar radiation,

due to the internal consumption of the Sunny Boy, so that you will not notice the idling

voltage of the solar generator. The internal consumption will be relatively neglectible as

soon as the solar radiation increases.

• The operation display of the SWR 700 resp. SWR 850 consists of three 3 LEDs

(Light Emitting Diodes). The meaning of these is described in chapter 5.



5 Operation and Failure Display

General

The SWR 700/850 works fully automatic and maintenance-free on principle. For e-

xample, the device switches off completely in the night, when solar supply is impossible.

With the first sunbeam on the next morning the SWR 700 resp. SWR 850 will start up

fully automatic, and will feed power to the mains as soon as the radiation suffices. If the

solar radiation is not sufficient, the device will wait for better conditions in idle state.

During the first starting procedure every day the SWR 700/850 carries out a number of

internal and specified safety tests unnoticed by the user.

A display consisting of three LEDs indicates the relevant operating states.

There are two indications calling the user or installer to further acting. They are descri-

bed in the following chapter 5.2.



Abbildung 5.1: Partial front view of the SWR 700, SWR 850 identical

Signs and symbols for the following text:

LED is on ⊗ LED is off

LED is blinking State not defined

5.1 Operation Display

Switched off during the night

Operation ⊗

Earth fault ⊗ All LEDs are off

Failure ⊗



The SWR 700 resp. SWR 850 is switched off during the night.

This operation state is reached when the string voltage at the in-

verter is too low for feeding, UPV < ca. 50 V

Operation

Earth fault All LEDs are lit

Failure

The SWR 700/850 is in a transition state, e.g before the first fee-

ding in the morning. The inverter string voltage is between a-

bout 50 V and 70 V. Power supply is already sufficient for the in-

ternal grid, but not sufficient for mains supply. Communication

with Sunny Data is also not possible yet.

Operation

Operation Green LED is lit

Earth fault

Failure

The SWR 700/850 is in one of its normal operation states, which

may be:

− Feeding operation

− Inverter shut-down

− Idling operation

− Inverter start-up



Manual stop

Operation Green LED is blinking

Earth fault

Failure

The SWR 700/850 is in a stop-state chosen by the user, it can be

activated via the program Sunny Data.

5.2 Failure Display

Mains failure

Operation Green LED is blinking

Earth fault

Failure Yellow LED is lit

The SWR 700/850 is in a stop-state due to missing mains voltage

or exceeding of the mains impedance (v. chapter 2.3.2, Mains

disconnection device). This state will be reached, if the mains po-

wer supply is broken down due to some reason (e.g. your power

utility has switched off the supply for some time, or the supply is

broken down due to a thunderstorm).

As soon as the mains voltage reappears, the device will start up

again into one of the normal operation states.

If you ever notice this failure display although you are sure that the

power supply in your house is okay, let a specialist check the mains

connection of your SWR 700/850.

The mains fuse in the device should be checked (v. fig. 3.3).



Before checking the mains fuse disconnect the device on mains side.

If the failure remains being displayed although mains power is

supplied to the SWR 700/850, the reason for this might be too

high mains impedance. This is possible if the lead diameter is too

small for the lead length.

To check the mains impedance it is recommended to evaluate it

by using Sunny Data. If the value is too high (ZAC ≥ 1,25 Ω), the

SWR 700/850 cannot feed to the mains. In this case you should

use leads with a greater diameter.

Failure, a specialist must be called in

Operation ⊗ Green LED is off

Earth fault

Failure Yellow LED is lit

The device is in a state from which it cannot switch over to a nor-

mal operation state. Presumably the device is defective.

A specialist must check the device.

Isolation fault, a specialist should be called in

Operation



Earth fault Red LED is lit

Failure

The inverter indicates an earth fault via the red LED, a state,

which is only getting indicated, but does not lead to a device shut-

down. Therefore it can be indicated together with other displays.

There are two possible reasons for earth fault indication. There

may be an insulation fault in the PV generator connection, or at

least one of the thermic-monitored varistors on DC input side has

become highly resistant and is therefore without function.

In the following you will find a description how you can find out

which fault it is.

• Insulation fault

There is an insulation fault in the solar generator or in its connections, i.e. the plus

or minus line, or one of the PV modules has a conductive connection (< 500

kOhm) with earth potential.

Due to safety reasons it is urgently recommended to let a specialist check

and repair the cause of the isolation fault.

A low-resistant connection between the plus or minus lead and the earth potential,

which is indicated as isolation fault, increases the possibility of dangerous contact

currents in case of touching only one point with DC potential. This means that if

you touch any electrical connection of the solar generator you might get an electric

shock, because usually you are connected to earth potential yourself.

• Thermic-monitored varistors

Thermic-monitored varistors are installed on DC input side of the SWR 700/850 -

Sunny Boy - (plus and minus line each against PE), which have the task to protect SWR700-14:EE - 48 - SMA Regelsysteme GmbH


the inverter from athmospheric overvoltages (effects of the electric potential of

thunderstorm clouds or remote lightning strokes).

After thermic-monitored varistors (a thermic-monitored varistor is a series circuit of

a varistor and a thermic fuse) have released several times, they may enter a state

of high resistance, which disables their protective function. This state is indicated

via a lit earth fault LED.

In any case we recommended to let a specialist replace the thermic-monito-

red varistors.

• Fault analysis

The red LED indicates both states mentioned above. In the following is described,

how a specialist can find out the actual fault.

This is a brief description. You should also consider all relevant hints in chapters

3.4 'Electrical Connection', and chapter 4 'Putting into Operation'.

− Disconnect the inverter from the mains.

− Open the device and disconnect all poles of the inverter from the PV gene-

rator via the disconnection terminals.

− Unfasten and remove the two thermic-monitored varistors V1 and V2 (v.

fig. 5.2) using a suitable screwdriver.



• The thermic-monitored varistors are installed in a terminal strip on the main bo-

ard (lower left, v. fig. 3.3).

− Bridge terminals 2 and 3 each (v. fig. 5.2).

− Re-connect the PV generator by re-connecting the disconnection terminal.

− Re-connect the mains.

• In case the red LED is not lit now, read on under A, in case it is lit, read on un-

der B.

A The red LED is not lit. At least one of the thermic-monitored varistors is defective.

We recommend to replace both varistors with replacement parts, which you can

only purchase from the manufacturer.

Fig. 5.2: Thermic-monitored varistors

Please note that the thermic-monitored varistors are not available on the market, but are especially designed for the SWR 700/850 - Sunny Boy.

B The red LED is still lit. Proceed as follows:




− Remove the two bridges 2-3, and connect the two terminals 2 via a bridge.

− Connect the PV generator and the mains several times.



• If the red LED is still lit, the device is defective and must be repaired by the ma-

nufacturer.

If the red LED goes out, there is an insulation fault in the PV generator resp. in the connecting lines.




− Now localize the insulation fault by means of suitable measurements, and

repair it.



6 Technical Data

6.1 SWR 700

Input values (solar generator)

Input voltage range: UPV 125 .. 250 V DC

(corresponds with 700 WPACnom)

changeable to 100 .. 200 V DC


or

75 .. 150 V DC


(corresponds with ca. 10, 8 or 6 PV modules with 36 to 40 cells each in a temperature

range from -10°C to +70°C)

Depending on the installed PV modules it is necessary to check whether the input volta-

ge remains within the selected range for the above mentioned temperatures. This

means that the no-load voltage of the connected string must not exceed the respective

input voltage at -10°C (UO -10°C < maximum input voltage range). The MPP voltage of the

connected string must not fall short of the respective input voltage range at +70°C (UMPP

+70°C > minimum input voltage range).

Input current: IPVnom depending on the input voltage

ca. 3.1 to 6.2 A

The inverter SWR 700 Sunny Boy is able to feed a maximum output power of 700 W to

the mains.



The maximum input current the inverter can receive depends on the respective input

voltage.

The inverter cannot be damaged in case a solar generator supplies mo-

re than the maximum usable input current, if the input voltage remains

within the admissible range.

Fig. 6.1: Input current as a function of input voltage

All-pole disconnection device

on DC input side yes

Thermic-monitored varistors


Voltage ripple: Uss < 5 %

Earth fault detection: yes

Protection from confusing the poles: yes, via short-circuit diode

Short-circuit proof: on mains side via current

control



Output values (mains connection)

Nominal output power: PACnom 700 W, 560 W, 420 W

Working range, mains voltage: UAC 196 - 253 V AC

Working range, mains frequency: fAC 49.8 - 50.2 Hz

Output current distortion factor: KIAC < 3 % (at KUmains < 2 %, PAC > 0.5 PACnom)

Phase shift factor: Cos ϕ 1

EMC: EN 50081, part 1

EN 50082, part 1

Mains retroaction: EN 60555, EN 55014

Test voltage: 1.5 kV

Mains supervision: automatic disconnection

device according to VDEW

Certification

Conformity certificate according to VDEW

including disconnection device: yes

CE conformity certificate: yes

Power consumption

Internal consumption during operation: ca. 4 W

Internal consumption during night operation: 0 W

Efficiency

Max. efficiency: ηmax ≥ 93 %

Protection type



Protection type acc. to DIN 40050/IEC 529: IP65

Size and weight

Size (W x H x D): ca. 322 x 290 x 180 mm

Weight: ca. 18.5 kg

Environmental conditions

Admissible ambient temperature range: -25 oC to +60 oC

Admissible relative air humidity: 0 .. 93 %, non-condensing

Diagnosis and Communication

Measured values: solar generator voltage UPV

mains voltage UAC

mains frequency fAC

output power PAC

output current IAC

working hours h

energy (kWh) E

operation mode



Fig. 6.2: Efficiency curve and current and voltage form of the SWR 700

Technical alterations and improvements of the device reserved.



Parameter list

Sunny Data gets all parameters when setting the SWR 700. The following table shows

the parameter list.

No. Name Unit Range Default values

(for PV input voltage)

Alteration

possible by ...

von... bis... 125..250V 100..200V 75..150V

1 SMA-SN fixed

2 Upv-Start* 125.0 150.0

V 100.0 250.0 125.0 installer

75.0 95.0

3 T-Start s 5.0 300.0 10.0 10.0 10.0 installer

4 Upv-Stop* 121.0 120.0

V 98.0 250.0 97.0 installer

73.0 72.0

5 T-Stop s 1.0 300.0 2.0 2.0 2.0 installer

6 Usoll-Konst 125.0 140.0

V 100.0 250.0 140 installer

75.0 140

23 I-NiTest mA 0 6000 4500 4000 3000 installer

28 Uac-Min V 180 300 198 198 198 installer

29 Uac-Max V 180 300 251 251 251 installer

30 Fac-Min Hz 49 51 49,81 49,81 49,81 installer

31 Fac-Max Hz 49 51 50,19 50,19 50,19 installer

32 Zac-Max mOhm 0 20000 1700 1700 1700 installer

33 dZac mOhm 0 2000 350 350 350 installer

43 Hardware-BFS Version fixed

44 Software-BFR Version fixed

45 Software-SRR Version fixed

49 Ue-Trafo 0.34 0.27 0.20 SMA

68 Operation mode Mpp-operation

Mpp-operation

Mpp-operation

installer

69 Recording funct. no no no installer * For proper service condition of the Sunny Boy Upv-Start mut be larger than Upv-Stop.



6.2 SWR 850

Input values (solar generator)

Input voltage range: UPV 125 - 250 V DC


(corresponds with ca. 10, 8 or 6 PV modules with 36 to 40 cells each in a temperatur

range from -10 °C bis +70 °C)

Depending on the installed PV modules it is necessary to check whether the input volta-

ge remains within the selected range for the above mentioned temperatures. This

means that the no-load voltage of the connected string must not exceed the input volta-

ge at -10 °C (UO -10 °C < maximum input voltage range). The MPP voltage of the connec-

ted string must not fall short of the input voltage range at +70 °C (UMPP +70 °C > minimum

input voltage range).

Input current: IPVnom depending on the input voltage

ca. 3.7 to 7.3 A

The inverter SWR 850 Sunny Boy is able to feed a maximum output power of 850 W to

the mains.

The maximum input current the inverter can receive depends on the respective input

voltage.

The inverter cannot be damaged in case a solar generator supplies mo-

re than the maximum usable input current, if the input voltage remains

within the admissible range.



Fig. 6.3: Input current as a function of input voltage

All-pole disconnection device


Thermic-monitored varistors


Voltage ripple: Uss < 5 %

Earth fault detection: yes

Protection from confusing the poles: yes, via short-circuit diode

Short-circuit proof: on mains side via current control

Output values (main connection)

Nominal output power: PACnom 850 W

Working range, mains voltage: UAC 196 - 253 V AC

Working range, mains frequency: fAC 49.8 - 50.2 Hz

Output current distortion factor: KIAC < 3 %

(at KUmains < 2 %, PAC > 0.5 PACnom)

Phase shift factor: Cos ϕ 1



EMC: EN 50081, part 1

(EN 55014)

EN 50082, part 1

Mains retroaction: EN 60555

Test voltage: 1.5 kV

Mains supervision: automatic disconnection device

according to VDEW

Certification

Conformity certificate according to VDEW

including disconnection device: yes

CE conformity certificate: yes

Power consumption

Internal consumption during operation:ca. 4 W

Internal consumption during night operation:0 W

Efficiency

Max. efficiency: ηmax ≥ 93 %

Protection type

Protection type acc. to DIN 40050/IEC 529: IP65

Size and weight

Size (W x H x D): ca. 322 x 290 x 180 mm

Weight: ca. 18.5 kg

Environmental conditions



Admissible ambient temperature range: -25 oC to +60 oC

Admissible relative air humidity: 0 ... 93 %, non condensing

Diagnosis and communication

Measured values: solar generator voltage UPV

mains voltage UAC

mains frequency fAC

output power PAC

output current IAC

working hours h

energy (kWh) E

operation mode

Fig. 6.4: Efficiency curve and current and voltage form of the SWR 850

Technical alterations and improvements of the device reserved.



Parameter list

Sunny Data gets all parameters when setting the SWR 850. The following table shows

the parameter list.

No. Name Unit Range Default values

(for PV input voltage)

Alteration

possible by ...

from.. to... 125..250V

1 SMA-SN fixed

2 Upv-Start* V 125.0 250.0 160.0 installer

3 T-Start s 5.0 300.0 10.0 installer

4 Upv-Stop* V 121.0 250.0 120.0 installer

5 T-Stop s 1.0 300.0 2.0 installer

6 Usoll-Konst V 125.0 250.0 140.0 installer

23 I-NiTest mA 0 6000 4500 installer

28 Uac-Min V 180 300 198 installer

29 Uac-Max V 180 300 251 installer

30 Fac-Min Hz 49 51 49.81 installer

31 Fac-Max Hz 49 51 50.19 installer

32 Zac-Max mOhm 0 20000 1700 installer

33 dZac mOhm 0 2000 350 installer

43 Hardware-BFS Version fixed

44 Software-BFR Version fixed

45 Software-SRR Version fixed

49 Ue-Trafo 0.34 SMA

68 Operation mode Mpp operation installer

69 Recording funct. none installer

* For proper service condition of the Sunny Boy Upv-Start must be larger than Upv-Stop.



7 Sunny Data


The conception of modular PV systems leads to a spatially distributed placement of

string inverters SWR 700 resp. SWR 850. An easy and fast function check by means of

status monitoring and measured value acquisition of every SWR 700/850 is carried out

centrally (as a rule via the mains) on a PC with the Windows program Sunny Data.

7.2 Data Transmission

7.2.1 Data Transmission via Mains Lead

Usually, the signal transmission between the PC and all inverters takes place simply via

the existing mains leads (using the power line modem integrated in the SWR 700 resp.

SWR 850 and a plug-in modem for the PC) so that no additional data lines are needed

(v. fig. 7.1). The PC can be located anywhere because it receives data from any mains

socket. Precondition for trouble-free operation is that the inverter(s) and the plug-in mo-

dem for the PC are connected to the same lead (same phase) of the household mains.

If Sunny Boys and the plug-in modem are connected to different leads, a so-called pha-

se coupler will make possible communication within the whole household mains. This

phase coupler can be purchased from SMA; it must be installed by a specialist in the

household distribution.

Further limitations of power line data transmission are described in chapters

7.2.2 and 8.



Fig. 7.1: Data transmission via mains cable

7.2.2 Data Transmission via Separate Data Line

In electric grids with strong high-frequency load, e.g. in an industrial environment, it may

happen that power line data transmission is not possible due to the strong harmonic

distortion. In this case there is the possibility to carry out the communication between

the inverter(s) and the PC via a separate data line.



7.2.2.1 Data Line (RS232)

If only one SWR 700 resp. SWR 850 is to be connected to a PC, the easiest variant is

their direct connection via a RS232 interface. In this case the maximum data line length

between the Sunny Boy and the PC is about 12 m.

Fig. 7.2: Data transmission via separate data line, one SWR 700 resp. SWR 850



7.2.2.2 Data Line (RS485)

In case several SWR 700 or SWR 850 are to be connected to a PC in an environment

with strong harmonic distortion, a RS485 interface with separate data line should be u-

sed, which allows a data line length of up to 1200 m.

Fig. 7.3: Data transmission via separate data line, several SWR 700 or SWR 850



7.3 Diagnosis and Communication

The communication by means of Sunny Data makes possible the following functions:

• Continuous operation data acquisition of all connected string inverters and ap-

pertaining PV module groups

• Operation state monitoring and failure indication

• Online measured data transmission from one selected SWR 700/850

• Identification of faulty strings

• Graphical representation of the data of one SWR 700/850 or comparison of se-

veral SWR 700/850



7.4 Graphical User Interface using MS Windows

The very comfortable PC program Sunny Data, which works under Windows, offers a

fully graphical user interface and all the positive features known from Windows. That's

why Sunny Data offers you the comfortable operation you can expect today.

Fig. 7.4: Graphical user interface Sunny Data



8 Guaranty Regulations and Liability

You have purchased a product, which was thoroughly checked before delivering. If your

device should be defective or show a malfunction during the guaranty period in spite of

it, please contact your distributor or installer.

Guaranty

The guaranty period is 12 months from the date of purchasing the device by the end

user. It ends at the latest 18 months after the delivery date at SMA, and includes all de-

fects caused by material or manufacturing faults.

The guaranty period for guaranty repairs or compensation deliveries ends 6 months af-

ter delivery, but runs at least until the expiration of the original guaranty period for the

delivered item.

Evidence

SMA will only render guaranty services, if the objected device is sent back to SMA to-

gether with a copy of the account the distributor has made out to the consumer. The

type plate at the device must be readable completely. In case of nonfulfillment SMA re-

serves the right to refuse guaranty services.

Conditions

The device will be repaired after the choice of SMA in its works without invoice of mate-

rial and work, or a replacement resp. compensation device will be delivered.

The objected device is to be sent back to SMA without charges in the original packing,

or in a transport packing of equal quality.



The customer has to grant SMA the necessary time and opportunity to repair the de-

fects.

Exclusion of Liability

Excluded are any guaranty claims and liabilities for direct or consequential damages due

to

− transportation damages,

− faulty installation or putting into operation,

− engagements, alterations, or repairing attempts,

− inappropriate use or operation,

− unsufficient air supply to the device,

− non-observance of relevant safety regulations (VDE etc.),

− or force majeure (lightning, overvoltage, storm, fire).

We cannot guarantee the proper function of the data transmission via mains

lead (power line modem) in case it is carried out in electric grids with high

harmonic distortion resp. high-frequency line distortions like e.g. industrial

power supply grids, or in the neighborhood of irregular consumers (unscree-

ned motors, switching power supplies, converters, etc.). Furthermore, the

simultaneous operation of babyphones may lead to short-time data trans-

mission disturbances or interruptions. In case of disturbed data transmission

via mains lead, we offer alternatively a communication via separate data line

as option (RS232 or RS485, v. chapter 7.2.2).

We do not guarantee that the software is completely free from faults. In case of a fault,

an instruction how to avoid the effects of the fault is also considered as sufficient repair.

Only the customer is responsible for the correct selection, orderly use, supervision, and

the results of the use of software.

We reserve the right to make alterations serving for the improvement of the device.



Further or other claims for direct or indirect damages, especially including claims for

damages from positive contract violation, are excluded insofar as not otherwise compel-

ling stated by law.



9 Enclosures

9.1 Supplement 1: Certificates for SWR 700

• SMA Conformity Certificate SWR 700

• CE Conformity Certificate SWR 700

• EMC Clearance Certificate SWR 700



9.2 Supplement 2: Certificates for SWR 850

• SMA Conformity Certificate SWR 850

• CE Conformity Certificate SWR 850

• EMC Clearance Certificate SWR 850



9.3 Supplement 3: Boring jig


Dokumentvorlage Handbuch (Style)

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