SOLAR PV BALANCE OF SYSTEM
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PV Balance of Systems – India Challenges and Global
Benchmarking
An Indian MNC in Power back-up industry
Focus on 3 verticals – Inverters/UPS, Batteries & Renewables
Has 10,000 strong dealers / distributors across country.
Manufacturing units – 6; Employees - 2000
23 Offices in India and one at Dubai.
Investment from Reliance India Power Fund (A JV between Reliance and Tamasek Holdings).
R&D recognized by CSIR, Govt of India.
65 Technology and Design patents in India and US.
Export to More than 50 countries.
Su-Kam Power Systems
RangeSweet Spot
Applications TAM
0 - 250W 5-10W
Rural Home Lighting, Street Lighting, Lanterns,Emergency Lights, Lighting Retrofits etc
20 million+ households, Remote Village Electrification program of MNRE covering about 10,000 villages
India’s Solar Market Classification
250W-5KW (off-grid)
1KWResidential, Small Commercial, SPV Pumps
Entire Power back-up industry market, 4 million inverters per year
5 - 50KW (roof-top, off-grid)
3-15KW
Big Commercial, Telecom Towers, Rural ATMs, Govt. Buildings
150,000+ rural telecom towers, 50,000+ rural ATMs
3 - 100KW (roof-top, grid connected)
3-25KWBig Commercial, Govt. Buildings
70% of commercial buildings in 2030 are to be built from now to 2030.
>100KW, IPP, Grid-connected
100KW-1MWIndependent Power Plants
National Solar Mission – 1000MW by 2013, 20,000MW by 2022
5” Ceiling Retrofits
Quality of charge controllers are mostly not good Mostly non-PWM. No multi-step charging No Temp. compensation of batteries No State of Charge information
Solar Applications – DC / Low Power Apps
SolarChargerController
Essentially a Cost Vs Performance dilemma!
EnergySource
PV Array
Loads
AC Distribution
Panel for Load
Utilization
Solar PVInverter
Battery
Mains
Solar Charger
Controller
Energy Conversion
Standalone Solar Power Systems for Households
Electronics Life – 10+ yrsEfficiency – 96%+Controlled DoD, Top-up Charging, Equalization
Battery Life – 1200-1500 cycles @ 60-70% DoD
All of above with wider temperature / moisture / dust / handling tolerances
High-efficiency charge controllersLow-cost MPPT
AMF Panel Solar Charge
Controller
Solar panel
Battery bank
Inverter
SMPS
Change Over switch
ACDBDCDB
DG EB Grid
DC Load AC Load
Controller & GSM/GPRS
Modem
Control & Measurement Bus
Off-grid Solar PV Systems (Telecom, ATM …)
Battery Management & Control System.High Efficiency
High Reliability, N+1 RedundancyModularity
Remote Monitoring, NOCC CenterAlerts and Triggers
Roof-top Grid Connected Systems
Islanding – Creating Virtual GridDG Set compatibility
Grid StabilityGrid Availability
Net MeteringFeed-in Tariff
Su-Kam Solar Energy Products
1. Solar Home Lighting System.2. Stand-alone Solar Power Systems for
households.3. Grid-Connected Solar Power Systems for
household and small establishments4. Solar Powered Street Lighting Systems.5. Solar Powered Water Heaters for
households6. Solar Powered Tube-wells.7. Solar Powering and Management
Systems for Cellular Mobile Towers.8. Solar Powering and Management
Systems for Rural ATM machines.
Su-Kam’s Completed Project – Rural Solar Home Lighting Systems
• 1.2 – 3.6W DC Consumption• 100 - 300 Lumens
Su-Kam’s Ongoing Projects – Solar LED Lighting Solutions
Essential Features :•More than 3 days of autonomy •Automatic Dusk to Dawn Controller (DTDC) / Timer operation •Highly efficient charge controller •Temperature compensated set points •Weather proof luminaries •All necessary protection •UV stabilized bowl and canopy •Anodized aluminum reflectors
• 7.2 – 14.4W DC Consumption
• 600-1200 Lumens
PV Module
SCC
Solar Inverter
LOAD
Battery
LOAD
Mains
Available in 250VA,400VA, 650VA, 850VA,
1500VA packages!
Su-Kam’s Completed Projects – Standalone Solar Power Systems for
Households
Su-Kam’s Completed Projects – Standalone Solar Power Systems for
Households
Su-Kam’s Ongoing Projects –
MCD Aap Ke Dwaar
Solar powering of 2000 Information Kiosks for Municipal Corporation of Delhi, New Delhi
Su-Kam Solar PCU Range: 1 to 10 KVA
Power Back-upfor
Telecom
Major Clients:
6 KW Hybrid Solar Powering of Telecom Site in Uganda
Su-Kam’s Completed Projects ...
Su-Kam’s Ongoing Projects – Solar Powering of
ATM Machines
State Bank of Patiala ATM, Sangrur, Punjab – Turnkey Solution for Hybrid Solar-Grid
powering.
Su-Kam’s Completed Projects ...
40 KW Solar Inverter at Brahma Kumaris Ashram, Manesar
Three Phase Solar Inverter Range with Grid Charging: 10 to 100 KW
Su-Kam’s Ongoing Projects – Grid-Connected Solar Power
Systems for household and small establishments
Grid-tied Solar Inverter Available from 3 KW – 10 KW
Grid-tied Solar Inverter
Monitoring SoftwareSolar Inverter 1P (till 10KW)
Solar Inverter 3P (till 100KW)
SMF Battery (7.2 – 200AH)
Solar Panels Solar HF Inverters Solar Charge Controllers
Solar Power Conditioning Units (PCU)
Su-Kam Solar Products
Su-Kam’s Valued Clients
Testing Standards / Accreditation Agencies
IEC 61727
PV Systems - Characteristics of the Utility Interface. <10KW PV systems connected to low voltage grid.
IEC 62109
Safety of Static Inverters. Comparable to UL 1741. Mechanical and Electrical safety aspects
IEC 62116
Testing procedure of Islanding Prevention Methods for Utility-Interactive PV Inverters
IEC 60364
Electrical Installations of Buildings: Requirements for Solar PV power supply systems
G83/1 Engineering Recommendation For Small Scale Embedded GeneratorMain focus on
Power Quality Parameters Voltage & Frequency Range Flicker, DC injection Harmonics and PFLoss of Mains test
Under / Over Voltage: 207V / 264VUnder / Over Frequency: 47Hz / 50.5Hz
IEC PV BoS Standards
NABL, Solar Energy Center, Fraunhofer Institute, Intertek
Customize the PV Inverter testing standards for India
Testing Accreditation
Focus on new technologies• Multi-string inverters - a single inverter to
convert power input from several module strings, reducing inverter costs for PV systems.
• Maximum Power Point Tracker (MPPT) for each string, ensuring maximum energy yield.
• Modularity and N+1 redundancy• Improve MTBF to give better reliability• Improved Higher KVA product range.• Minor KVA adjustments in the lower end
inverters. • HF Solar Inverters• Micro inverters for maximizing the
efficiency.• Grid Interactive solar Inverters to be a part
of the solar Power generation play – will be the dominant business in the coming years
Solar Inverter – R&D, Future NeedsR&D: “Center of Excellence in PV” at IIT-Mumbai - Network of CoEs
MNRE’s PV Research Council – Industry Experts, Scientists, Researchers, Reps …
CIIE at IIM, Ahmadabad Innumerable Solar start-ups
1st Generation – Early adoption, Technology proofing. 2nd Generation – Repeatability, Efficiency. 3rd Generation – Scaling-up.
Future Needs: Need to create critical mass of researchers Fill the link between lab to plant Pre-competitive collaborative research thru’ open domain or
consortium model Cost Effective Power Electronics – MPPTs, Micro Inverters. Special Focus on Batteries and storage technologies Innovative solutions – esp. Business models …
Summing Up …OPPORTUNITY:• India’s National Solar Mission: To set up a capacity
of solar power generation of 20000 MW by 2022• Seen as the long term solution to India’s power
deficit• Total Capital Outlay at Today’s Prices for adding
20,000MW Capacity is INR 4 lakh crores (USD 90 Billion)!
• Share of Electronics (Balance of System) alone will be Rs 80000 Crores (US $20 Billion)!
CHALLENGES:• Need unique solution for India for grid-tie inverters. Grid is unstable
and isn’t available most of the time. Doesn’t comply to any of the known specifications.
• Need Solar Charge Controllers that can take advantage of the existing Inverters / HUPS that are already installed for off-grid applications.
• Need low-cost, high-efficiency charge controllers (MPPT?) that can work with wide-variety of batteries.
• Inverters (Solar / Otherwise) are still designed with chips designed for motor control application. Need Inverter specific solution (Input PFC, Battery monitoring/algorithms, Charge current/mains sense, Power device drivers etc)
Thanks