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 |
|---|---|---|---|---|---|---|
| 1 | SolarWorld | Protect SW 280 Mono | Monocrystalline | 280 | 9.72 | 99 |
| 2 | SolarWorld | Protect SW 270 Mono | Monocrystalline | 270 | 9.67 | 98 |
| 3 | SolarWorld | Protect SW 275 Mono | Monocrystalline | 275 | 9.53 | 98 |
| 4 | SolarWorld | Protect SW 265 Mono | Monocrystalline | 265 | 9.51 | 98 |
| 5 | SolarWorld | Protect SW 275 Mono Black | Monocrystalline | 275 | 9.44 | 98 |
| 6 | SolarWorld | Protect SW 260 Mono | Monocrystalline | 260 | 9.33 | 98 |
| 7 | SolarWorld | SW 280 Mono | Monocrystalline | 280 | 9.29 | 98 |
| 8 | SolarWorld | Protect SW 270 Mono Black | Monocrystalline | 270 | 9.28 | 97 |
| 9 | SolarWorld | Protect SW 260 Mono Black | Monocrystalline | 260 | 9.22 | 97 |
| 10 | SolarWorld | SW 300 Mono | Monocrystalline | 300 | 9.22* | 97 |
| 11 | SolarWorld | SW270 Mono Black | Monocrystalline | 270 | 9.21 | 97 |
| 12 | SolarWorld | Protect SW 265 Mono Black | Monocrystalline | 265 | 9.12 | 97 |
| 13 | SolarWorld | SW 295 Mono | Monocrystalline | 295 | 9.08* | 97 |
| 14 | SolarWorld | Protect SW 255 Mono Black | Monocrystalline | 255 | 9.04 | 97 |
| 15 | SolarWorld | Protect SW 255 Mono | Monocrystalline | 255 | 9.04 | 97 |
| 16 | SolarWorld | SW265 Mono Black | Monocrystalline | 265 | 8.97 | 96 |
| 17 | SolarWorld | SW 290 Mono | Monocrystalline | 290 | 8.96* | 96 |
| 18 | SolarWorld | SW265 Mono | Monocrystalline | 265 | 8.93 | 96 |
| 19 | SolarWorld | Protect SW 290 Mono | Monocrystalline | 290 | 8.93* | 96 |
| 20 | SolarWorld | SW 335 XL mono | Monocrystalline | 335 | 8.85* | 95 |
| 21 | SolarWorld | SW260 Mono | Monocrystalline | 260 | 8.84 | 95 |
| 22 | SolarWorld | SW 285 Mono | Monocrystalline | 285 | 8.81* | 95 |
| 23 | SolarWorld | Protect SW 285 Mono | Monocrystalline | 285 | 8.78* | 95 |
| 24 | SolarWorld | SW 285 Mono Black | Monocrystalline | 285 | 8.72* | 94 |
| 25 | SolarWorld | SW255 Mono | Monocrystalline | 255 | 8.69 | 94 |
| 26 | SolarWorld | SW260 Mono Black | Monocrystalline | 260 | 8.66 | 93 |
| 27 | SolarWorld | SW 315 XL mono | Monocrystalline | 315 | 8.62 | 93 |
| 28 | SolarWorld | SW 325 XL mono | Monocrystalline | 325 | 8.57* | 92 |
| 29 | SolarWorld | SW 280 Mono Black | Monocrystalline | 280 | 8.56* | 92 |
| 30 | SolarWorld | SW250 Poly | Polycrystalline | 250 | 8.52 | 91 |
| 31 | SolarWorld | SW255 Mono Black | Monocrystalline | 255 | 8.51 | 91 |
| 32 | SolarWorld | SW 310 XL mono | Monocrystalline | 310 | 8.49 | 91 |
| 33 | SolarWorld | SW 275 Mono | Monocrystalline | 275 | 8.48* | 91 |
| 34 | SolarWorld | SW 320 XL mono | Monocrystalline | 320 | 8.45* | 90 |
| 35 | SolarWorld | SW255 Poly | Polycrystalline | 255 | 8.43 | 90 |
| 36 | SolarWorld | SW250 Mono Black | Monocrystalline | 250 | 8.42 | 89 |
| 37 | SolarWorld | SW240 mono black | Monocrystalline | 240 | 8.36 | 88 |
| 38 | SolarWorld | SW250 Mono | Monocrystalline | 250 | 8.35 | 88 |
| 39 | SolarWorld | SW245 Poly | Polycrystalline | 245 | 8.34 | 88 |
| 40 | SolarWorld | SW 270 Mono | Monocrystalline | 270 | 8.30* | 87 |
| 41 | SolarWorld | SW245 Mono Black | Monocrystalline | 245 | 8.25 | 85 |
| 42 | SolarWorld | SW 275 Mono Black | Monocrystalline | 275 | 8.18 | 83 |
| 43 | SolarWorld | SW235 mono black | Monocrystalline | 235 | 8.03 | 77 |
| 44 | SolarWorld | SW 265 Poly | Polycrystalline | 265 | 8.03* | 77 |
| 45 | SolarWorld | SW240 Poly | Polycrystalline | 240 | 8.03 | 77 |
| 46 | SolarWorld | SW245 mono | Monocrystalline | 245 | 8.01 | 76 |
| 47 | SolarWorld | SW240 mono | Monocrystalline | 240 | 7.93 | 72 |
| 48 | SolarWorld | SW 260 Poly | Polycrystalline | 260 | 7.88* | 70 |
| 49 | SolarWorld | SW235 Poly | Polycrystalline | 235 | 7.87 | 69 |
| 50 | SolarWorld | SW 305 XL mono | Monocrystalline | 305 | 7.78* | 64 |
| 51 | SolarWorld | SW235 mono | Monocrystalline | 235 | 7.73 | 62 |
| 52 | SolarWorld | SW230 Poly | Polycrystalline | 230 | 7.69 | 60 |
| 53 | SolarWorld | SW230 mono | Monocrystalline | 230 | 7.56 | 52 |
| 54 | SolarWorld | SW230 mono black | Monocrystalline | 230 | 7.54 | 50 |
| 55 | SolarWorld | SW225 Poly | Polycrystalline | 225 | 7.53 | 49 |
| 56 | SolarWorld | SW225 mono | Monocrystalline | 225 | 7.41 | 42 |
| 57 | SolarWorld | SW220 Poly | Polycrystalline | 220 | 7.40 | 41 |
| 58 | SolarWorld | SW225 mono black | Monocrystalline | 225 | 7.38 | 40 |
| 59 | SolarWorld | SW220 mono black | Monocrystalline | 220 | 7.22 | 32 |
| 60 | SolarWorld | SW175 mono | Monocrystalline | 175 | 7.22 | 31 |
| 61 | SolarWorld | SW220 mono | Monocrystalline | 220 | 7.08 | 25 |
| 62 | SolarWorld | SW165 mono | Monocrystalline | 165 | 6.79 | 14 |
* 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.