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 Philadelphia Solar

Here are the PSI Ratings for modules from Philadelphia Solar, 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
1Philadelphia SolarPS-P60-250Polycrystalline2507.72*61
2Philadelphia SolarPS-P54-225Polycrystalline2257.70*60
3Philadelphia SolarPS-P60-245Polycrystalline2457.56*51
4Philadelphia SolarPS-P72-290Polycrystalline2907.54*50
5Philadelphia SolarPS-P54-220Polycrystalline2207.51*49
6Philadelphia SolarPS-M72S-190Monocrystalline1907.42*43
7Philadelphia SolarPS-P72-285Polycrystalline2857.42*43
8Philadelphia SolarPS-P60-240Polycrystalline2407.39*41
9Philadelphia SolarPS-P54-215Polycrystalline2157.34*38
10Philadelphia SolarPS-P36-145Polycrystalline1457.33*37
11Philadelphia SolarPS-P72-280Polycrystalline2807.28*35
12Philadelphia SolarPS-P60-235Polycrystalline2357.25*33
13Philadelphia SolarPS-M72S-185Monocrystalline1857.22*31
14Philadelphia SolarPS-M36S-95Monocrystalline957.20*31
15Philadelphia SolarPS-P54-210Polycrystalline2107.17*29
16Philadelphia SolarPS-P72-275Polycrystalline2757.16*28
17Philadelphia SolarPS-P36-140Polycrystalline1407.10*25
18Philadelphia SolarPS-P60-230Polycrystalline2307.09*25
19Philadelphia SolarPS-M72S-180Monocrystalline1807.03*22
20Philadelphia SolarPS-P72-270Polycrystalline2707.03*22
21Philadelphia SolarPS-P54-205Polycrystalline2057.00*22
22Philadelphia SolarPS-M36S-90Monocrystalline906.91*18
23Philadelphia SolarPS-P36-135Polycrystalline1356.83*15
24Philadelphia SolarPS-P60-220Polycrystalline2206.78*14
25Philadelphia SolarPS-P36-130Polycrystalline1306.58*9

* 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.