Presentation title - "Benchmarking solar PV plants on the Basis of EN61724 and methods to maintain the Performance Ratio & Availability"

1. Benchmarking solar PV plants on the Basis of EN61724 and methods to maintain the Performance Ratio & Availability Intersolar Mumbai 15 Dec 2011 iPLON GmbH ( Germany) Victor Thamburaj ( CEO)

6. PR = Yield final / Yield reference This final yield represents the number of hours per day that the array would need to operate at its rated output power P 0 to equal its monitored contribution to the net daily load . This reference yield represents the number of hours per day during which the solar radiation would need to be at reference irradiance levels in order to contribute the same incident energy as was monitored

7. where P N is the nominal peak power of the plant (in kWp) H is the irradiation (in kWh/m 2 ) on the panels’ plane I stc is the irradiance value (1.00 kW/m 2 ) in standard test conditions Reference Energy The reference energy E ref (in kWh) of the plant is expressed as:

8. T m is the average temperature of modules (in °C) measured during the test period during daytime (meanwhile irradiation > 200W/m 2 )  is the Power Temperature coefficient of the panels (in absolute value %/°C)

24. OVERALL TESTING STRATEGY Provisional Acceptance Test (PAT) : after this test has been positively passed, a “Provisional Acceptance Certificate” (PAC) is issued and the O&M phase is entered Intermediate/Mid Test (MT) : this test shall be carried out 12 months after PAC date; Final Acceptance Test (FAT) : this test shall be carried out 24 months after PAC date; after this test has been positively passed, a “Final Acceptance Certificate” (FAC) is issued .

27. System Failure domains Energy Loss Relative share in % AC Sub systems 30 Inverters 35 DC Subsystems 15 Rest 20 Relative frequency Events AC Sub systems 10 Inverters 60 DC Subsystems 15 Rest 15

28. O&M Costs O&M Costs ( €/MWp/year Euros Scheduled Maintenance/Cleaning 19,000 Unschedules Maintenance 1,500 Inverter Issues 7,500 O&M (without Insurance etc) 28,000

31. Products of iPLON EPC Solar Infranet (iAT, iMT, Internet connectivity) String Monitoring Inverter Monitoring Environ-mental Sensors Monitoring AC Power Metering (Evc. Point) Trans-former / Grid connected comp. Monitoring System Engineering Reviews Document. Project Mgmt. Services O&M Comissioning Training & Workshops Application and Application Support

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