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 BJ Penn

Here are the PSI Ratings for modules from BJ Penn, 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
1BJ PennBJP265M-BvPolycrystalline2658.35*88
2BJ PennBJP315M-AvPolycrystalline3158.30*87
3BJ PennBJP260M-BvPolycrystalline2608.20*84
4BJ PennBJP310M-AvPolycrystalline3108.18*83
5BJ PennBJP255S-BMonocrystalline2558.07*78
6BJ PennBJP305M-APolycrystalline3058.05*77
7BJ PennBJP305M-AvPolycrystalline3058.05*77
8BJ PennBJP255M-BvPolycrystalline2558.05*78
9BJ PennBJP255M-BPolycrystalline2558.03*77
10BJ PennBJP300M-APolycrystalline3007.93*72
11BJ PennBJP250S-BMonocrystalline2507.92*72
12BJ PennBJP300M-AvPolycrystalline3007.91*71
13BJ PennBJP250M-BvPolycrystalline2507.89*70
14BJ PennBJP250M-BPolycrystalline2507.87*69
15BJ PennBJP295M-APolycrystalline2957.79*65
16BJ PennBJP295M-AvPolycrystalline2957.78*64
17BJ PennBJP245S-BMonocrystalline2457.76*63
18BJ PennBJP245M-BvPolycrystalline2457.72*61
19BJ PennBJP245M-BPolycrystalline2457.71*60
20BJ PennBJP290M-AvPolycrystalline2907.66*58
21BJ PennBJP240M-BPolycrystalline2407.62*55
22BJ PennBJP290M-APolycrystalline2907.58*53
23BJ PennBJP285M-AvPolycrystalline2857.52*49
24BJ PennBJP285M-APolycrystalline2857.44*45
25BJ PennBJP280M-APolycrystalline2807.32*37
26BJ PennBJP275M-APolycrystalline2757.19*30
27BJ PennBJP270M-APolycrystalline2707.05*24

* 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.