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 Gloria Solar

Here are the PSI Ratings for modules from Gloria 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
1Gloria SolarGSM6-240D-E1Polycrystalline2407.40*41
2Gloria SolarGSM6-235D-E1Polycrystalline2357.26*34
3Gloria SolarGSM6-230D-E1Polycrystalline2307.09*25
4Gloria SolarGSS5-180A-E1Monocrystalline1807.01*22
5Gloria SolarGSM6-225D-E1Polycrystalline2256.96*19
6Gloria SolarGSS5-175A-E1Monocrystalline1756.82*15
7Gloria SolarGSS5-170A-E1Monocrystalline1706.69*11
8Gloria SolarGSM6-220D-E1Polycrystalline2206.59*9
9Gloria SolarGSS5-165A-E1Monocrystalline1656.47*7
10Gloria SolarGSM6-215D-E1Polycrystalline2156.45*7
11Gloria SolarGSM6-210D-E1Polycrystalline2106.27*5
12Gloria SolarGSS5-160A-E1Monocrystalline1606.26*5
13Gloria SolarGSM6-205D-E1Polycrystalline2056.13*4
14Gloria SolarGSM6-200D-E1Polycrystalline2006.00*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.