Offering Technical DD Lite
Tool for quick assessment of a solar portfolio for initial screening of different plants to develop a realistic estimate of energy generation for faster decision making and more accurate IRR predictions at pre-NBO stage.
Lite enables faster, customized & accurate analysis
01. Accurate Energy yield prediction at Pre-NBO
- Seller’s PV Syst adjusted as per actual data from plant
- Improvements considered based on operational & design parameters
- Re-powering potential checked
02. Faster decision making
- Web-based platform
- Automated data-upload and analysis
- Reports available on one click
03. Customizable output
- User can modify key assumptions
- E.g. availability, re-powering, solar resource
- Estimates for P50,75,90
Leverage data & PV-D’s technical and field expertise
Inputs
Must haves
- As built PV-Syst
- Historical generation data
- Historical recorded radiation
- Module and inverter details
Add-ons
- Plant breakdown data
- Auxiliary consumption data
- Historical generation at multiple nodes
e.g. inverters, transformers, outgoing feeders, substation
- PAN & OND file for module and inverter make
Analysis
Adjustment for Actual losses
- Actual plant and grid availability
- AC/DC losses, auxiliary consumption, inverter i/o efficiency
- PR degradation based on historical trends
Adjustment for solar resource
- Comparison of different radiation sources with actual
- APIs to extract data from multiple sources
- Option to select the data source
- Recommendation based on field experience
Potential improvements
- Max. generation with improved plant availability or other parameters
- Re-powering potential
- Customization based on re-investment plan for modules
Output
Realistic & Customized P50/75/90 generation & CUF estimate
Comparison of Lite results with full DD
50 MWp, Rajasthan
Key Differences between As-built & Lite
- The plant unavailability for Lite is as per TTM site data (0.40%) while it’s assumed to be 0 for as-built
- The POA-rad source for As-built is Solar GIS (6.13 kWh/m2/day) and for Lite is MN7.2 (6.01 kWh/m2/day), corrected based on field experience
Key Differences between Lite & Full DD
- Module degradation in Lite is 0.71% as per module datasheet and in Full DD is 1.36% as module IV testing
- The POA-rad source for Lite is MN7.2 (6.01 kWh/m2/day) and for full DD is (6.27 kWh/m2/day) based on field data
- The Power trafo + TL loss is considered for Full DD as per TTM site data (1.03%) but not considered for Lite
70 MWp, Telengana
Key Differences between As-built & Lite
- The plant unavailability for As-built is 2.50% and for Lite as per TTM site data (1.86%)
- The POA-rad source for As-built is MN7.1 (5.56 kWh/m2/day) and for Lite is taken average value (5.53 kWh/m2/day) of various radiation sources
Key Differences between Lite & Full DD
- The plant unavailability for Lite is 1.86% and for Full DD is 3.15%
- The rate of module degradation for Lite is as per module datasheet and for Full DD is as per module flash test results
- The POA-rad source for Lite is (5.53 kWh/m2/day) and for full DD is (5.61 kWh/m2/day)
- The TL loss is considered for Full DD 0.18% as per TTM site data but for Lite it is not considered
12.2 MWp, Telengana
Key Differences between As-built & Lite
- The plant unavailability for As-built is 2.50% and for Lite as per TTM site data (2.12%)
- The POA-rad source for As-built is MN7.1 (6.95 kWh/m2/day) and for Lite is taken average value (6.69 kWh/m2/day) of various rad sources
Key Differences between Lite & Full DD
- The plant unavailability for Lite is 2.12% and for Full DD is 3.48%
- The rate of module degradation for Lite is as per module datasheet and for Full DD is as per module flash test results
- The POA-rad source for Lite is(6.69 kWh/m2/day) and for full DD is (6.80 kWh/m2/day)
- The TL loss is considered for Full DD 0.99% as per TTM site data but for Lite it is not considered
Radiation Assessment
Key Differences between Lite & Full DD
- The plant unavailability for Lite is 2.12% and for Full DD is 3.48%
- The rate of module degradation for Lite is as per module datasheet and for Full DD is as per module flash test results
- The POA-rad source for Lite is(6.69 kWh/m2/day) and for full DD is (6.80 kWh/m2/day)
- The TL loss is considered for Full DD 0.99% as per TTM site data but for Lite it is not considered
