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 Siliken Modules

Here are the PSI Ratings for modules from Siliken Modules, 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
1Siliken ModulesSLK72P6L BLK/WHT 305WpPolycrystalline3057.94*73
2Siliken ModulesSLK72P6L SLV/WHT 305WpPolycrystalline3057.94*73
3Siliken ModulesSLK60P6L SLV/WHT 255WpPolycrystalline2557.89*70
4Siliken ModulesSLK60P6L BLK/WHT 255WpPolycrystalline2557.89*70
5Siliken ModulesSLK72P6L BLK/WHT 300WpPolycrystalline3007.82*67
6Siliken ModulesSLK72P6L SLV/WHT 300WpPolycrystalline3007.82*67
7Siliken ModulesSLK60P6L BLK/WHT 250WpPolycrystalline2507.79*65
8Siliken ModulesSLK60P6L SLV/WHT 250WpPolycrystalline2507.79*65
9Siliken ModulesSLK60P6L BLK/BLK 250WpPolycrystalline2507.74*62
10Siliken ModulesSLK72P6L BLK/WHT 295WpPolycrystalline2957.69*59
11Siliken ModulesSLK72P6L SLV/WHT 295WpPolycrystalline2957.69*59
12Siliken ModulesSLK60P6L BLK/WHT 245WpPolycrystalline2457.62*55
13Siliken ModulesSLK60P6L SLV/WHT 245WpPolycrystalline2457.62*55
14Siliken ModulesSLK60P6L BLK/BLK 245WpPolycrystalline2457.57*52
15Siliken ModulesSLK72P6L SLV/WHT 290WpPolycrystalline2907.56*52
16Siliken ModulesSLK72P6L BLK/WHT 290WpPolycrystalline2907.56*52
17Siliken ModulesSLK60P6L SLV/WHT 240WpPolycrystalline2407.48*47
18Siliken ModulesSLK60P6L BLK/WHT 240WpPolycrystalline2407.48*47
19Siliken ModulesSLK72P6L BLK/WHT 285WpPolycrystalline2857.43*43
20Siliken ModulesSLK72P6L SLV/WHT 285WpPolycrystalline2857.43*43
21Siliken ModulesSLK60P6L BLK/BLK 240WpPolycrystalline2407.43*43
22Siliken ModulesSLK72P6L SLV/WHT 280WpPolycrystalline2807.35*38
23Siliken ModulesSLK72P6L BLK/WHT 280WpPolycrystalline2807.35*38
24Siliken ModulesSLK60P6L BLK/WHT 235WpPolycrystalline2357.32*37
25Siliken ModulesSLK60P6L SLV/WHT 235WpPolycrystalline2357.32*37
26Siliken ModulesSLK60P6L BLK/BLK 235WpPolycrystalline2357.27*34
27Siliken ModulesSLK72P6L BLK/WHT 275WpPolycrystalline2757.21*31
28Siliken ModulesSLK72P6L SLV/WHT 275WpPolycrystalline2757.21*31
29Siliken ModulesSLK60P6L SLV/WHT 230WpPolycrystalline2307.15*28
30Siliken ModulesSLK60P6L BLK/WHT 230WpPolycrystalline2307.15*28
31Siliken ModulesSLK60P6L BLK/BLK 230WpPolycrystalline2307.10*26
32Siliken ModulesSLK60P6L BLK/WHT 225WpPolycrystalline2257.08*25
33Siliken ModulesSLK72P6L BLK/WHT 270WpPolycrystalline2707.07*24
34Siliken ModulesSLK72P6L SLV/WHT 270WpPolycrystalline2707.07*24
35Siliken ModulesSLK60P6L SLV/WHT 225WpPolycrystalline2257.03*22
36Siliken ModulesSLK60P6L BLK/BLK 225WpPolycrystalline2256.99*21
37Siliken ModulesSLK60P6L BLK/BLK 220WpPolycrystalline2206.93*18
38Siliken ModulesSLK60P6L BLK/WHT 220WpPolycrystalline2206.92*18
39Siliken ModulesSLK60P6L SLV/WHT 220WpPolycrystalline2206.89*17
40Siliken ModulesSLK60P6L BLK/WHT 215WpPolycrystalline2156.77*13
41Siliken ModulesSLK60P6L BLK/BLK 215WpPolycrystalline2156.76*13
42Siliken ModulesSLK60P6L SLV/WHT 215WpPolycrystalline2156.73*12
43Siliken ModulesSLK60P6L SLV/WHT 210WpPolycrystalline2106.63*10
44Siliken ModulesSLK60P6L BLK/WHT 210WpPolycrystalline2106.63*10
45Siliken ModulesSLK60P6L BLK/WHT 205WpPolycrystalline2056.45*7
46Siliken ModulesSLK60P6L SLV/WHT 205WpPolycrystalline2056.45*7

* 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.