Download - 3. Soladi Buyers Guide FA 2

BUYERS GUIDE – SOLAR TECHNOLOGY

Solar energy is abundant, free and carbon-neutral without any downtime, outages or load-shedding for the next few Billion years.

It can also be harvested to replace 92%+ of our energy needs currently using carbon based energy sources.

Solar water heating absorbs the heat of the sun and is released through your taps and Solar radiation that is converted to electricity are the two technologies that are implemented.

Solar water heating

A Solar Geyser will not only pay for itself but also provide substantial savings in energy spend over its life expectancy. With this technology two factors must be considered:

1. Efficiency2. Life expectancy

Two technologies are available in both geysers and energy collectors.

1. Geysers

Direct systems heats the water directly in the collectors and in-direct systems use a heat transfer medium; GLYCOL or anti-freeze that circulates through the collectors and transfers absorbed heat to the water in the geyser through a heat exchanger. Direct systems are very robust and the original technology but in-direct systems can be also be used in frost prone or freezing conditions.

Calcificationbecauseofmineralsandimpuritiesinthewateralsoaffectsthelifeandmaintenance of direct systems so we use in-direct systems.

2. Collectors

The original “Flat Plate” panels are very durable and robust; it uses 6-10mm copper tubes encased in a “Hot-Box” behind low iron, solar glass while Evacuated tubes use a copper tube surrounded by a vacuum inside a glass or poly-carbonate tube as a heat extractor. Quality tube systems are 10-15%moreefficientthanflatplates,itwasdevelopedforhotwaternorthofthearcticcircle with its low radiation but is relatively fragile and isn’t suited to Africa’s harsh conditions. We simply enlargeourflatplateareacommensuratewithdemandforalowmaintenance,efficientsystem.

Why a Soladi Geyser?

We market, support and maintain systems using latest generation “Double-Jacket” technology with aninternationalfootprintandenviabletrackrecord.Ourflagshiprangewitha10yearguaranteeandmaintenance plan and a German developed system manufactured locally to SABS standards with a 5 year guarantee and maintenance plan.

1. Efficiency

Our“Double-Jacket”technologyusesadoubleskin,filledwithGLYCOLwhichisconnectedtothe collectors to form a closed-loop system that ensures the warmest part of the geyser surrounds thewaterforahighlyefficientoptimizationofcapturedheat.Heatlossduringthenightisless than 10% where other geysers lose up to 35%. 2. Life expectancy

All our systems come standard with a maintenance plan as part of the guarantee, either 5 or 10 Years. The weather proof outer skin encloses another 2 skins of 2mm high grade steel (Soladi 5) or 2 skins of 3mm mild steel (Soladi 10) that make up the “Double-Jacket” heat exchanger,sametechnology,differentapplicationbutbothextremelyrobustandefficient. Both inner skins are coated with a waterproof fused enamel lining to prevent rust and are tested and rated to operate at up to 6 BAR. A 200 L Soladi 5 weighs 44 Kgs and a Soladi 10,87 Kgs.

Soladisystemsarethebestintheirfields,oneaninternationalimportandothersthebestavailable locally with international standard technology.

Peaceofmindispricelessandbothofferthiswithourunique,inclusivemaintenanceplan.

Photo-Voltaic Electricity

Solar Photo-Voltaic technology converts solar radiation (photons) into electricity by the photons knocking electronsfromtheatomsintheSolarcellsandtheseflowsthroughthecells,producingelectricityina direct current. This is used to charge the battery bank of a Solar Power station and an inverter then converts it to alternating current for our daily use. This technology is applied in three ways:

1. Grid-tied

The most economical way to use this technology because it works symbiotically with the national grid, using it in-lieu of a battery bank to subsidize normal consumption. Biggest shortfall is that you can’t access it during grid failure, outages or load-shedding and mostly used by larger consumers as a hedge against escalating cost and to reduce consumption.

2. Back-up

This application has an energy bank that supplies lighter consumers 24 hours a day, 7 days a week and provides basic but constant and reliable electricity, even during grid-failure, outages and Load-shedding while also feeding excess generated capacity back into the grid.

3. Off-grid

For reliable, constant electricity where there is no grid available or no grid connection is wanted. Has a bigger and higher energy bank rating to support full demand with generator support to load batteries during overcast conditions.

As the above graph clearly shows, payback varies depending on application. By combining the two solar technologies (See Soladi ”Load-shed buster” Super combo), payback can be achieved in as little as 30 - 36 months.

There are up to 5 components that has to be integrated with the above three systems.

1. Solar array

Thesolarpanelsarethecollectorsoftheenergysupplyandrequirelight,notheattowork.Each must be connected in “strings” or “blocks” to be integrated with the system electronics and the grid to be supplied with the energy. Positioning of installation is important and tracking arrays are used in low radiation areas.

2. Electronic suites

The electronics converts and regulates the collected energy for easy, everyday use by means of inverters, charge controllers, isolators and various components according to design parameters. TheintegrationoftheseiscriticaltoensuretheefficiencyandlongevityofthePowerstationand should be done by experts.

3. Energy bank

The one component where future developments could bring down the cost, currently lead- acid, gel,saturatedmatt,lithium-ionetc.isavailablewithvaryingbenefits.Lead-acidtechnologyhasa lifeexpectancyof10-13years+ifproperlyspecified,controlledandmaintainedandistheonly tech we specify.

4. Installation and support

The design, installation and support/monitoring of the installation will ultimately determine its efficiencyandreturnoninvestment.Soladihasabuiltin10or20Yearmaintenanceplanonour standard designs to ensure this.

5. Support energy source

Where a grid is available or connected, this will provide energy to charge the batteries during overcastconditionsortosupplyadditionalenergyondemand.Withanoff-gridsystem,a generator (diesel or petrol) or even a wind turbine could provide this.

Extensive research that is constantly upgraded with improvements ensures that the Soladi range of Power stations is, and will remain on the cutting edge of applied solar technology.

TM

A F R I C A

To m o r r o w ’s E n e r g y To d a y

SOLAR GEYSERSINTRODUCTION SOLAR ELECTRICITY CONTACT US24/7LOADSHED BUSTERHOME PROJECTSBUYERS GUIDE

1800

1600

1400

1200

1000

800

600

400

200

0Midday EveningMorning

D A I L Y S O L A R E N E R G Y G E N E R A T I O N

Energy Need Production Renewable Energy Self-use

S O L A R R E P L A C E S 9 2 % O F C A R B O N - B A S E D E L E C T R I C I T Y

11%42%

WATER HEATING LIGHTIN

G

BALANCE ENERGY DEMAND

CO

OK

ING

8%

39%

Soladi Africa (Pty) LtdPO Box 1897Somerset West [email protected]: 074 272 9757

M A I N T E N A N C E P L A N

TM

A F R I C A

Maintenance plan for Soladi solar water heating and photo-voltaic electricity installations.

Membership No.

BENEFICIARY:

To m o r r o w ’ s E n e r g y To d a y

R500

R400

R300

R200

R100

R0

-R100

Years

CUMULATIVE, NON-DISCOUNTED PAYBACK AND SAVINGS

S O L A D I P O W E R S T A T I O N P A Y B A C K

* Estimates vary according to usage patterns** Calculated @ 17.5% average escalation per annum

*** Eskom escalation since 2009 @ 28.9%

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

Thou

sand

s

Notfinancedwithdepreciationwith kVa savingsNotfinancedwithdepreciationwithout kVa savingsBetween 7 and 10 year payback

15KW 4/5KW DETERMINED BY EFFICIENCY, SIZE AND DEMAND

SOLADI’S APPLIED SOLAR TECHNOLOGY

R750

R500

R450

R300

R150

R0

-R150

Years

BREAK-THROUGH AND CUMULATIVE, NON-DISCOUNTED SAVINGS

S O L A D I O F F - G R I D P O W E R S T A T I O N



0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

Thou

sand

s

Notfinancedwithdepreciationwith kVa savingsNotfinancedwithdepreciationwithout kVa savingsBetween 7 and 10 year payback

ONCE-OFF INVESTMENT WITH NO OUTAGES, LOADSHEDDING OR MAINTENANCE


BACK-UP PV INSTALLATION COMPONENTS

SOLAR ARRAY

IN

STA

LLAT

ION

36%

21%

24% 19%

ENER

GY

BAN

K

E

LECTRONICS

GRID-TIED PV INSTALLATION COMPONENTS

30%

21%49%

ELECTRONIC COMPONENTS

IN

STAL

LATIO

N

SO

LAR

ARRAY

OFF-GRID PV INSTALLATION COMPONENTS

35%

22%

20% 18%

5%

SOLAR ARRAY

BACK

-UP

IN

STAL

LATI

ON

ENER

GY

BANK

ELECTRONICS

GENER

ATO

R

I f i t d o e s n ’ t s a y S o l a d i . . . i t ’ s n o t S o l a d i .

R500

R400

R300

R200

R100

R0

-R100

Years

CUMULATIVE CASH FLOW SAVINGS

G R I D - T I E D P A Y B A C K



0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

Thou

sand

s

NotfinancedwithSARSdepreciationwith kVa savingsNotfinancedwithSARSdepreciationwithout kVa savingsBetween 5.5 and 6.5 year payback

18KW


R150

R120

R90

R60

R30

R0

-R30

Years

CUMULATIVE, NON-DISCOUNTED SAVINGS

S O L A D I S O L A R G E Y S E R P A Y B A C K / S A V I N G S



0 1 2 3 4 5 6 7 8

Thou

sand

s

Soladi Solar Geyser: 24 – 36 months

Notfinancedwithdepreciation,with kVa savingsNotfinancedwithdepreciation,without kVa savings


CONSERVATIVE USE

NORMAL USE