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 Solarland USA

Here are the PSI Ratings for modules from Solarland USA, 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
1Solarland USASLP200S-24HMonocrystalline2007.94*72
2Solarland USASLP195S-24HMonocrystalline1957.74*63
3Solarland USASLP190S-72Monocrystalline1907.57*52
4Solarland USASLP240-18HPolycrystalline2407.56*51
5Solarland USASLP190S-24HMonocrystalline1907.54*50
6Solarland USASLP250S-96Monocrystalline2507.48*46
7Solarland USASLP235-18HPolycrystalline2357.40*42
8Solarland USASLP185S-72Monocrystalline1857.38*40
9Solarland USASLP245S-96Monocrystalline2457.34*38
10Solarland USASLP185S-24HMonocrystalline1857.31*36
11Solarland USASLP235-60Polycrystalline2357.28*35
12Solarland USASLP230-18HPolycrystalline2307.25*33
13Solarland USASLP240S-96Monocrystalline2407.19*30
14Solarland USASLP185S-24JMonocrystalline1857.16*28
15Solarland USASLP230-60Polycrystalline2307.13*27
16Solarland USASLP180S-24HMonocrystalline1807.11*26
17Solarland USASLP180S-24JMonocrystalline1806.99*21
18Solarland USASLP220-18HPolycrystalline2206.97*20
19Solarland USASLP225-60Polycrystalline2256.97*20
20Solarland USASLP175S-24HMonocrystalline1756.91*18
21Solarland USASLP230S-96Monocrystalline2306.88*17
22Solarland USASLP220-60Polycrystalline2206.83*15
23Solarland USASLP215-18HPolycrystalline2156.83*15
24Solarland USASLP175S-24JMonocrystalline1756.76*13
25Solarland USASLP215-60Polycrystalline2156.65*10
26Solarland USASLP210-18HPolycrystalline2106.65*10
27Solarland USASLP170S-24HMonocrystalline1706.62*10
28Solarland USASLP125S-17HMonocrystalline1256.49*7
29Solarland USASLP205-18HPolycrystalline2056.49*7
30Solarland USASLP165S-24HMonocrystalline1656.44*7
31Solarland USASLP200-18HPolycrystalline2006.34*6
32Solarland USASLP160S-24HMonocrystalline1606.23*5
33Solarland USASLP120S-17HMonocrystalline1206.21*4
34Solarland USASLP115S-17HMonocrystalline1155.95*3

* 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.