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 CSG PVTech

Here are the PSI Ratings for modules from CSG PVTech, 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
1CSG PVTechCSG265S2Monocrystalline2658.22*84
2CSG PVTechCSG260S2Monocrystalline2608.10*80
3CSG PVTechCSG305S2Monocrystalline3058.03*77
4CSG PVTechCSG255S2Monocrystalline2557.93*72
5CSG PVTechCSG300S2Monocrystalline3007.92*72
6CSG PVTechCSG300M2Polycrystalline3007.85*68
7CSG PVTechCSG295S2Monocrystalline2957.80*65
8CSG PVTechCSG250S2Monocrystalline2507.75*63
9CSG PVTechCSG295M2Polycrystalline2957.72*61
10CSG PVTechCSG195S1Monocrystalline1957.71*60
11CSG PVTechCSG290S2Monocrystalline2907.69*59
12CSG PVTechCSG245M2Polycrystalline2457.65*57
13CSG PVTechCSG245S2Monocrystalline2457.63*56
14CSG PVTechCSG290M2Polycrystalline2907.59*53
15CSG PVTechCSG285S2Monocrystalline2857.56*52
16CSG PVTechCSG240S2Monocrystalline2407.51*48
17CSG PVTechCSG190S1Monocrystalline1907.51*49
18CSG PVTechCSG240M2Polycrystalline2407.49*47
19CSG PVTechCSG285M2Polycrystalline2857.45*45
20CSG PVTechCSG280M2-36Polycrystalline2807.42*42
21CSG PVTechCSG235S2Monocrystalline2357.36*39
22CSG PVTechCSG235M2Polycrystalline2357.34*38
23CSG PVTechCSG185S1Monocrystalline1857.29*35
24CSG PVTechCSG275M2-36Polycrystalline2757.28*35
25CSG PVTechCSG180S1-36Monocrystalline1807.20*30
26CSG PVTechCSG230M2-30Polycrystalline2307.19*30
27CSG PVTechCSG205M2-27Polycrystalline2057.17*29
28CSG PVTechCSG270M2-36Polycrystalline2707.15*28
29CSG PVTechCSG180M2-24Polycrystalline1807.05*23
30CSG PVTechCSG225M2-30Polycrystalline2257.03*22
31CSG PVTechCSG265M2-35Polycrystalline2657.00*21
32CSG PVTechCSG175S1-36Monocrystalline1756.99*21
33CSG PVTechCSG200M2-27Polycrystalline2006.99*21
34CSG PVTechCSG220M2-30Polycrystalline2206.87*16
35CSG PVTechCSG175M2-24Polycrystalline1756.86*16
36CSG PVTechCSG260M2-35Polycrystalline2606.86*16
37CSG PVTechCSG195M2-27Polycrystalline1956.82*15
38CSG PVTechCSG255M2-35Polycrystalline2556.73*12
39CSG PVTechCSG170M2-24Polycrystalline1706.67*11
40CSG PVTechCSG190M2-27Polycrystalline1906.65*10
41CSG PVTechCSG250M2-35Polycrystalline2506.60*9
42CSG PVTechCSG165M2-24Polycrystalline1656.40*6
43CSG PVTechCSG160M2-24Polycrystalline1606.21*4

* 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.