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 LS Industrial Systems

Here are the PSI Ratings for modules from LS Industrial Systems, 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
1LS Industrial SystemsPVM S245Monocrystalline2457.62*55
2LS Industrial SystemsPVM S244Monocrystalline2447.58*53
3LS Industrial SystemsPVM S243Monocrystalline2437.55*51
4LS Industrial SystemsPVM S242Monocrystalline2427.53*50
5LS Industrial SystemsPVM S241Monocrystalline2417.51*48
6LS Industrial SystemsPVM S240Monocrystalline2407.51*48
7LS Industrial SystemsPVM S239Monocrystalline2397.47*46
8LS Industrial SystemsPVM S238Monocrystalline2387.45*45
9LS Industrial SystemsPVM S237Monocrystalline2377.43*43
10LS Industrial SystemsPVM S236Monocrystalline2367.40*42
11LS Industrial SystemsPVM S235Monocrystalline2357.38*40
12LS Industrial SystemsPVM S234Monocrystalline2347.35*39
13LS Industrial SystemsPVM S233Monocrystalline2337.33*37
14LS Industrial SystemsPVM S232Monocrystalline2327.30*36
15LS Industrial SystemsPVM S231Monocrystalline2317.28*35
16LS Industrial SystemsPVM S230Monocrystalline2307.26*34
17LS Industrial SystemsPVM S229Monocrystalline2297.23*32
18LS Industrial SystemsPVM S228Monocrystalline2287.21*31

* 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.