PV Balance of Systems – India Challenges and Global Benchmarking

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PV Balance of Systems India Challenges and
Global Benchmarking
Venkat Rajaraman CEO Su-Kam Power
Systems venkat_at_su-kam.com 91 99714 97602
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Su-Kam Power Systems

• 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).
• RD recognized by CSIR, Govt of India.
• 65 Technology and Design patents in India and US.
• Export to More than 50 countries.

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Indias Solar Market Classification
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Solar Applications DC / Low Power Apps
Solar Charger Controller

• 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

Essentially a Cost Vs Performance dilemma!
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Standalone Solar Power Systems for Households
High-efficiency charge controllers Low-cost MPPT
Mains
Energy Source
Energy Conversion
AC Distribution Panel for Load Utilization
Solar Charger Controller
Solar PV Inverter
PV Array
Loads
Battery
Electronics Life 10 yrs Efficiency
96 Controlled DoD, Top-up Charging, Equalization
Battery Life 1200-1500 cycles _at_ 60-70 DoD
All of above with wider temperature / moisture /
dust / handling tolerances
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Off-grid Solar PV Systems (Telecom, ATM )
Battery Management Control System. High
Efficiency
High Reliability, N1 Redundancy Modularity
Remote Monitoring, NOCC Center Alerts and Triggers
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Roof-top Grid Connected Systems

• Islanding Creating Virtual Grid
• DG Set compatibility

• Grid Stability
• Grid Availability

• Net Metering
• Feed-in Tariff

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Su-Kam Solar Energy Products

• Solar Home Lighting System.
• Stand-alone Solar Power Systems for households.
• Grid-Connected Solar Power Systems for household
  and small establishments
• Solar Powered Street Lighting Systems.
• Solar Powered Water Heaters for households
• Solar Powered Tube-wells.
• Solar Powering and Management Systems for
  Cellular Mobile Towers.
• Solar Powering and Management Systems for Rural
  ATM machines.

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Su-Kams Completed Project Rural Solar Home
Lighting Systems

• 1.2 3.6W DC Consumption
• 100 - 300 Lumens

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Su-Kams 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

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Su-Kams Completed Projects Standalone Solar
Power Systems for Households
PV Module
LOAD
SCC
LOAD
Solar Inverter
Available in 250VA, 400VA, 650VA, 850VA, 1500VA
packages!
Battery
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Su-Kams Completed Projects Standalone Solar
Power Systems for Households
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Su-Kams Ongoing Projects MCD Aap Ke Dwaar
Su-Kam Solar PCU Range 1 to 10 KVA
Solar powering of 2000 Information Kiosks for
Municipal Corporation of Delhi, New Delhi
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Su-Kams Completed Projects ...
6 KW Hybrid Solar Powering of Telecom Site in
Uganda
Power Back-up for Telecom
Major Clients
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Su-Kams Ongoing Projects Solar Powering of
ATM Machines
State Bank of Patiala ATM, Sangrur, Punjab
Turnkey Solution for Hybrid Solar-Grid powering.
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Su-Kams Completed Projects ...
40 KW Solar Inverter at Brahma Kumaris Ashram,
Manesar Three Phase Solar Inverter Range with
Grid Charging 10 to 100 KW
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Su-Kams Ongoing Projects Grid-Connected
Solar Power Systems for household and small
establishments
Grid-tied Solar Inverter
Grid-tied Solar Inverter Available from 3 KW
10 KW
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Su-Kam Solar Products
Monitoring Software
Solar Inverter 1P (till 10KW)
Solar Inverter 3P (till 100KW)
SMF Battery (7.2 200AH)
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Su-Kams Valued Clients
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Testing Standards / Accreditation Agencies
IEC PV BoS Standards
Testing Accreditation
NABL, Solar Energy Center, Fraunhofer Institute,
Intertek

• G83/1 Engineering Recommendation
• For Small Scale Embedded Generator
• Main focus on
• Power Quality Parameters
• Voltage Frequency Range
• Flicker, DC injection
• Harmonics and PF
• Loss of Mains test
• Under / Over Voltage 207V / 264V
• Under / Over Frequency 47Hz / 50.5Hz

Customize the PV Inverter testing standards for
India
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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 N1 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

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Solar Inverter RD, Future Needs

• RD
• Center of Excellence in PV at IIT-Mumbai -
  Network of CoEs
• MNREs PV Research Council Industry Experts,
  Scientists, Researchers, Reps
• CIIE at IIM, Ahmadabad
• Innumerable Solar start-ups

• 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

• 1st Generation Early adoption, Technology
  proofing. 2nd Generation Repeatability,
  Efficiency. 3rd Generation Scaling-up.

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Summing Up

• OPPORTUNITY
• Indias National Solar Mission To set up a
  capacity of solar power generation of 20000 MW by
  2022
• Seen as the long term solution to Indias power
  deficit
• Total Capital Outlay at Todays 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 isnt available
  most of the time. Doesnt 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)

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• Thanks