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Solar Inverters – from
COMPETENCY to CREATION
.
Su-Kam Power Systems
Range Sweet 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)
1KW Residential, Small Commercial, SPV Pumps
Entire Power back-up industry market, 4 million inverters per year
5 - 50KW (roof-top, off-grid)
3KW
Big Commercial, Telecom Towers, Rural ATMs, Govt. Buildings
150,000+ rural telecom towers, 50,000+ rural ATMs
3 - 100KW (roof-top, grid connected)
3-25KW Big Commercial, Govt. Buildings
70% of commercial buildings in 2030 are to be built from now to 2030.
>100KW, IPP, Grid-connected
100KW-1MW Independent 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
Solar
Charger
Controller
Essentially a Cost Vs Performance dilemma!
Energy
Source
PV Array
Loads
AC
Distribution
Panel for
Load
Utilization
Solar PV
Inverter
Battery
Mains
Solar
Charger
Controller
Energy
Conversion
Standalone Solar Power Systems for Households
Electronics Life – 10+ yrs
Efficiency – 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
controllers
Low-cost MPPT
AMF Panel Solar Charge
Controller
Solar panel
Battery bank
Inverter
SMPS
Change Over switch
ACDB DCDB
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
Redundancy
Modularity
Remote Monitoring,
NOCC Center
Alerts and Triggers
Roof-top Grid Connected Systems
Islanding – Creating Virtual Grid DG Set compatibility
Grid Stability
Grid Availability Net Metering
Feed-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 establishments
4. Solar Powered Street Lighting Systems.
5. Solar Powered Water Heaters for households
6. 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-up
for
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 Software Solar 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 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
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
Needs R&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 …
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Thanks