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 Green Power

Here are the PSI Ratings for modules from Green Power, 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
1Green PowerET-M572185Monocrystalline1858.19*83
2Green PowerET-P672280Polycrystalline2808.10*80
3Green PowerET-P672280BPolycrystalline2808.10*80
4Green PowerET-M572180Monocrystalline1807.98*74
5Green PowerET-P672275BPolycrystalline2757.95*73
6Green PowerET-P672275Polycrystalline2757.95*73
7Green PowerET-P672265BPolycrystalline2657.89*70
8Green PowerET-P672265Polycrystalline2657.89*70
9Green PowerET-M572175Monocrystalline1757.85*68
10Green PowerET-P672270BPolycrystalline2707.81*66
11Green PowerET-P672270Polycrystalline2707.81*66
12Green PowerET-P672260BPolycrystalline2607.75*63
13Green PowerET-P672260Polycrystalline2607.75*63
14Green PowerET-M572170Monocrystalline1707.63*56
15Green PowerET-P660235BPolycrystalline2357.53*50
16Green PowerET-P660235Polycrystalline2357.53*50
17Green PowerET-M572165Monocrystalline1657.38*40
18Green PowerET-P660230BPolycrystalline2307.37*40
19Green PowerET-P660230Polycrystalline2307.37*40
20Green PowerET-M572185BMonocrystalline1857.36*39
21Green PowerET-P660225BPolycrystalline2257.21*31
22Green PowerET-P660225Polycrystalline2257.21*31
23Green PowerET-P654210Polycrystalline2107.17*29
24Green PowerET-P654210BPolycrystalline2107.17*29
25Green PowerET-M572180BMonocrystalline1807.16*28
26Green PowerET-P660220BPolycrystalline2207.05*23
27Green PowerET-P660220Polycrystalline2207.05*23
28Green PowerET-P654205BPolycrystalline2056.98*20
29Green PowerET-P654205Polycrystalline2056.98*20
30Green PowerET-M572175BMonocrystalline1756.97*20
31Green PowerET-P654200Polycrystalline2006.83*15
32Green PowerET-P654200BPolycrystalline2006.83*15
33Green PowerET-P654195BPolycrystalline1956.65*10
34Green PowerET-P654195Polycrystalline1956.65*10
35Green PowerET-P654190BPolycrystalline1906.48*7

* 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.