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 SolarWorld

Here are the PSI Ratings for modules from SolarWorld, 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
1SolarWorldProtect SW 280 MonoMonocrystalline2809.7299
2SolarWorldProtect SW 270 MonoMonocrystalline2709.6798
3SolarWorldProtect SW 275 MonoMonocrystalline2759.5398
4SolarWorldProtect SW 265 MonoMonocrystalline2659.5198
5SolarWorldProtect SW 275 Mono BlackMonocrystalline2759.4498
6SolarWorldProtect SW 260 MonoMonocrystalline2609.3398
7SolarWorldSW 280 MonoMonocrystalline2809.2998
8SolarWorldProtect SW 270 Mono BlackMonocrystalline2709.2897
9SolarWorldProtect SW 260 Mono BlackMonocrystalline2609.2297
10SolarWorldSW 300 MonoMonocrystalline3009.22*97
11SolarWorldSW270 Mono BlackMonocrystalline2709.2197
12SolarWorldProtect SW 265 Mono BlackMonocrystalline2659.1297
13SolarWorldSW 295 MonoMonocrystalline2959.08*97
14SolarWorldProtect SW 255 Mono BlackMonocrystalline2559.0497
15SolarWorldProtect SW 255 MonoMonocrystalline2559.0497
16SolarWorldSW265 Mono BlackMonocrystalline2658.9796
17SolarWorldSW 290 MonoMonocrystalline2908.96*96
18SolarWorldSW265 MonoMonocrystalline2658.9396
19SolarWorldProtect SW 290 MonoMonocrystalline2908.93*96
20SolarWorldSW 335 XL monoMonocrystalline3358.85*95
21SolarWorldSW260 MonoMonocrystalline2608.8495
22SolarWorldSW 285 MonoMonocrystalline2858.81*95
23SolarWorldProtect SW 285 MonoMonocrystalline2858.78*95
24SolarWorldSW 285 Mono BlackMonocrystalline2858.72*94
25SolarWorldSW255 MonoMonocrystalline2558.6994
26SolarWorldSW260 Mono BlackMonocrystalline2608.6693
27SolarWorldSW 315 XL monoMonocrystalline3158.6293
28SolarWorldSW 325 XL monoMonocrystalline3258.57*92
29SolarWorldSW 280 Mono BlackMonocrystalline2808.56*92
30SolarWorldSW250 PolyPolycrystalline2508.5291
31SolarWorldSW255 Mono BlackMonocrystalline2558.5191
32SolarWorldSW 310 XL monoMonocrystalline3108.4991
33SolarWorldSW 275 MonoMonocrystalline2758.48*91
34SolarWorldSW 320 XL monoMonocrystalline3208.45*90
35SolarWorldSW255 PolyPolycrystalline2558.4390
36SolarWorldSW250 Mono BlackMonocrystalline2508.4289
37SolarWorldSW240 mono blackMonocrystalline2408.3688
38SolarWorldSW250 MonoMonocrystalline2508.3588
39SolarWorldSW245 PolyPolycrystalline2458.3488
40SolarWorldSW 270 MonoMonocrystalline2708.30*87
41SolarWorldSW245 Mono BlackMonocrystalline2458.2585
42SolarWorldSW 275 Mono BlackMonocrystalline2758.1883
43SolarWorldSW235 mono blackMonocrystalline2358.0377
44SolarWorldSW 265 PolyPolycrystalline2658.03*77
45SolarWorldSW240 PolyPolycrystalline2408.0377
46SolarWorldSW245 monoMonocrystalline2458.0176
47SolarWorldSW240 monoMonocrystalline2407.9372
48SolarWorldSW 260 PolyPolycrystalline2607.88*70
49SolarWorldSW235 PolyPolycrystalline2357.8769
50SolarWorldSW 305 XL monoMonocrystalline3057.78*64
51SolarWorldSW235 monoMonocrystalline2357.7362
52SolarWorldSW230 PolyPolycrystalline2307.6960
53SolarWorldSW230 monoMonocrystalline2307.5652
54SolarWorldSW230 mono blackMonocrystalline2307.5450
55SolarWorldSW225 PolyPolycrystalline2257.5349
56SolarWorldSW225 monoMonocrystalline2257.4142
57SolarWorldSW220 PolyPolycrystalline2207.4041
58SolarWorldSW225 mono blackMonocrystalline2257.3840
59SolarWorldSW220 mono blackMonocrystalline2207.2232
60SolarWorldSW175 monoMonocrystalline1757.2231
61SolarWorldSW220 monoMonocrystalline2207.0825
62SolarWorldSW165 monoMonocrystalline1656.7914

* 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.