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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
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


Kindly read the details here – https://www.pv-diagnostics.com/newsroom/techddlite