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 Perlight Solar

Here are the PSI Ratings for modules from Perlight 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
1Perlight SolarPLM-290P-72Polycrystalline2907.53*50
2Perlight SolarPLM-305M-72Monocrystalline3057.48*46
3Perlight SolarPLM-240P-60Polycrystalline2407.46*46
4Perlight SolarPLM-300M-72Monocrystalline3007.46*46
5Perlight SolarPLM-250M-60Monocrystalline2507.43*43
6Perlight SolarPLM-295M-72Monocrystalline2957.43*43
7Perlight SolarPLM-290M-72Monocrystalline2907.43*43
8Perlight SolarPLM-245M-60Monocrystalline2457.43*44
9Perlight SolarPLM-285P-72Polycrystalline2857.40*42
10Perlight SolarPLM-280P-72Polycrystalline2807.37*40
11Perlight SolarPLM-235P-60Polycrystalline2357.35*38
12Perlight SolarPLM-255M-60Monocrystalline2557.35*39
13Perlight SolarPLM-270P-72Polycrystalline2707.28*35
14Perlight SolarPLM-185M-72Monocrystalline1857.26*34
15Perlight SolarPLM-275P-72Polycrystalline2757.23*32
16Perlight SolarPLM-230P-60Polycrystalline2307.23*32
17Perlight SolarPLM-240M-60Monocrystalline2407.16*28
18Perlight SolarPLM-225P-60Polycrystalline2256.93*18
19Perlight SolarPLM-220P-60Polycrystalline2206.70*12
20Perlight SolarPLM-175M-72Monocrystalline1756.69*11
21Perlight SolarPLM-215P-60Polycrystalline2156.53*8
22Perlight SolarPLM-210P-60Polycrystalline2106.38*6
23Perlight SolarPLM-205P-60Polycrystalline2056.21*4

* 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.