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 Schott Solar

Here are the PSI Ratings for modules from Schott 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
1Schott SolarPerform Mono 260Monocrystalline2607.93*72
2Schott SolarPerform Mono 255Monocrystalline2557.75*63
3Schott SolarPERFORM POLY 250Polycrystalline2507.64*57
4Schott SolarPerform Mono 250Monocrystalline2507.58*53
5Schott SolarPERFORM POLY 245Polycrystalline2457.50*48
6Schott SolarPerform Mono 245Monocrystalline2457.44*44
7Schott SolarPoly 240Polycrystalline2407.37*40
8Schott SolarPerform Poly 240Polycrystalline2407.37*39
9Schott SolarPerform Mono 240Monocrystalline2407.27*34
10Schott SolarPerform Poly 235Polycrystalline2357.20*31
11Schott SolarPoly 235Polycrystalline2357.20*31
12Schott SolarPerform Poly 217Polycrystalline2177.19*30
13Schott SolarPoly 217Polycrystalline2177.19*30
14Schott SolarPoly 230Polycrystalline2307.05*23
15Schott SolarPerform Poly 230Polycrystalline2307.05*23
16Schott SolarPoly 225Polycrystalline2256.90*17
17Schott SolarPerform Poly 225Polycrystalline2256.90*17
18Schott SolarPoly 210Polycrystalline2106.81*14
19Schott SolarPerform Poly 210Polycrystalline2106.81*14
20Schott SolarPerform Poly 220Polycrystalline2206.75*13
21Schott SolarPoly 220Polycrystalline2206.75*13
22Schott SolarSAPC-175Monocrystalline1756.59*9
23Schott SolarASE-300-DGF/50-310Polycrystalline3106.58*9
24Schott SolarPerform Poly 202Polycrystalline2026.56*8
25Schott SolarPoly 202Polycrystalline2026.56*8
26Schott SolarSAPC-170Polycrystalline1706.32*5
27Schott SolarASE-300-DGF/50-300Polycrystalline3006.31*5
28Schott SolarSAPC-165Polycrystalline1656.12*4
29Schott SolarSAPC-165SPolycrystalline1656.12*4
30Schott SolarASE-300-DGF/50-290Polycrystalline2906.07*3
31Schott SolarASE-300-DGF/50-280Polycrystalline2805.91*3
32Schott SolarASE-300-DGF/50-270Polycrystalline2705.64*2
33Schott SolarASE-300-DGF/50-260Polycrystalline2605.39*2
34Schott SolarASE-300-DGF/50-250Polycrystalline2505.29*2
35Schott SolarASE-300-DGF/42-240Polycrystalline2405.27*2
36Schott SolarASE-300-DGF/34-195Polycrystalline1994.28*1
37Schott SolarASE-300-DGF/25-145Polycrystalline1473.24*0

* 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.