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 Ligitek Photovoltaic

Here are the PSI Ratings for modules from Ligitek Photovoltaic, 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
1Ligitek PhotovoltaicLM285BB02Polycrystalline2857.55*51
2Ligitek PhotovoltaicLM240BB00Polycrystalline2407.51*48
3Ligitek PhotovoltaicLM280BB02Polycrystalline2807.45*45
4Ligitek PhotovoltaicLM185AA00Monocrystalline1857.45*45
5Ligitek PhotovoltaicLM235BB00Polycrystalline2357.36*39
6Ligitek PhotovoltaicLM185BB00Polycrystalline1857.34*38
7Ligitek PhotovoltaicLM275BB02Polycrystalline2757.34*38
8Ligitek PhotovoltaicLM180AA00Monocrystalline1807.29*35
9Ligitek PhotovoltaicLM270BB02Polycrystalline2707.24*32
10Ligitek PhotovoltaicLM230BB00Polycrystalline2307.20*30
11Ligitek PhotovoltaicLM180BB00Polycrystalline1807.18*29
12Ligitek PhotovoltaicLM265BB02Polycrystalline2657.13*27
13Ligitek PhotovoltaicLM175AA00Monocrystalline1757.11*26
14Ligitek PhotovoltaicLM225BB00Polycrystalline2257.04*23
15Ligitek PhotovoltaicLM175BB00Polycrystalline1757.02*22
16Ligitek PhotovoltaicLM220BB00Polycrystalline2206.89*17
17Ligitek PhotovoltaicLM215BB00Polycrystalline2156.71*12
18Ligitek PhotovoltaicLM210BB00Polycrystalline2106.56*9
19Ligitek PhotovoltaicLG052BB00Polycrystalline526.15*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.