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 Foxconn International

Here are the PSI Ratings for modules from Foxconn International, 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
1Foxconn InternationalFSM250-D2C0Polycrystalline2507.76*63
2Foxconn InternationalFSM225-D3C0Polycrystalline2257.73*62
3Foxconn InternationalFSM295-D1E0Polycrystalline2957.66*57
4Foxconn InternationalFSM245-D2C0Polycrystalline2457.60*54
5Foxconn InternationalFSM295-D1F0Polycrystalline2957.59*53
6Foxconn InternationalFSM220-D3C0Polycrystalline2207.56*51
7Foxconn InternationalFSM290-D1E0Polycrystalline2907.53*50
8Foxconn InternationalFSM195-D4C0Polycrystalline1957.49*47
9Foxconn InternationalFSM290-D1F0Polycrystalline2907.47*46
10Foxconn InternationalFSM240-D2C0Polycrystalline2407.45*45
11Foxconn InternationalFSM285-D1E0Polycrystalline2857.40*42
12Foxconn InternationalFSM215-D3C0Polycrystalline2157.38*40
13Foxconn InternationalFSM285-D1F0Polycrystalline2857.34*38
14Foxconn InternationalFSM190-D4C0Polycrystalline1907.31*36
15Foxconn InternationalFSM235-D2C0Polycrystalline2357.29*35
16Foxconn InternationalFSM280-D1E0Polycrystalline2807.27*34
17Foxconn InternationalFSM280-D1F0Polycrystalline2807.21*31
18Foxconn InternationalFSM210-D3C0Polycrystalline2107.21*31
19Foxconn InternationalFSM275-D1E0Polycrystalline2757.14*27
20Foxconn InternationalFSM230-D2C0Polycrystalline2307.13*27
21Foxconn InternationalFSM185-D4C0Polycrystalline1857.11*26
22Foxconn InternationalFSM275-D1F0Polycrystalline2757.08*25
23Foxconn InternationalFSM205-D3C0Polycrystalline2057.04*23

* 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.