Principal Solar Institute

A community for development and installation professionals in the solar industry

The Principal Solar Institute Module Ratings

The Principal Solar Institute’s scientifically designed and certified combination of tests and performance standards provide an unbiased, comprehensive rating system – the PSI PV module rating. Seven essential characteristics related to initial and long-term PV module performance are combined to create the PSI Rating:

  • Actual Tested Maximum Power vs. Advertised
  • Temperature Coefficient at Maximum Power
  • Power at Low Irradiance to Power at High Irradiance Ratio
  • Normal Operating Cell Temperature (NOCT)
  • Total Area Efficiency
  • Negative Power Tolerance
  • Annual Power Reduction

These ratings allow you to make comparisons when analyzing PV modules and help you select the optimal PV module.

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PSI Ratings – PV Solar Modules from Du Pont Apollo

Here are the PSI Ratings for modules from Du Pont Apollo, calculated based on initial performance test data. If you don’t see a solar module that you are considering, contact us and we will try to add it.

Rank Manufacturer Model Type Power
(W DC)
PSI Rating Percentile
1Du Pont ApolloDA136-C2Thin Film1364.78*1
2Du Pont ApolloDA133-C2Thin Film1334.66*1
3Du Pont ApolloDA130-C2Thin Film1304.57*1
4Du Pont ApolloDA105-A6Thin Film1053.81*1
5Du Pont ApolloDA102-A6Thin Film1023.81*1
6Du Pont ApolloDA105-A2Thin Film1053.70*1
7Du Pont ApolloDA100-A6Thin Film1003.64*1
8Du Pont ApolloDA100-A2Thin Film1003.54*0
9Du Pont ApolloDA095-A6Thin Film953.44*0
10Du Pont ApolloDA095-A2Thin Film953.34*0

* Modules denoted with an “*” use estimated values for one or more characteristics. Manufacturers can contact us to provide the missing data for these PV modules.

NOTE: PSI Ratings are based on publicly available data, and are subject to change as additional data and proprietary analyses become available for long-term performance.