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:
These ratings allow you to make comparisons when analyzing PV modules and help you select the optimal PV module.
Before using the PSI Ratings, you should subscribe to our email list to receive important updates from the Principal Solar Institute.
Here are the PSI Ratings for modules from Isofoton, 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 | Isofoton | ISFP-270 White | Polycrystalline | 270 | 8.52* | 91 |
2 | Isofoton | ISFP-270 Black | Polycrystalline | 270 | 8.48* | 91 |
3 | Isofoton | ISFP-265 White | Polycrystalline | 265 | 8.36* | 88 |
4 | Isofoton | ISFP-265 Black | Polycrystalline | 265 | 8.32* | 87 |
5 | Isofoton | ISFT-255 | Monocrystalline | 255 | 8.30* | 87 |
6 | Isofoton | ISFP-260 White | Polycrystalline | 260 | 8.20* | 84 |
7 | Isofoton | ISFP-260 Black | Polycrystalline | 260 | 8.17* | 82 |
8 | Isofoton | ISF-255 | Monocrystalline | 255 | 8.13* | 81 |
9 | Isofoton | ISFT-250 | Monocrystalline | 250 | 8.12* | 80 |
10 | Isofoton | ISFP-255 White | Polycrystalline | 255 | 8.06* | 78 |
11 | Isofoton | ISF-255 Black | Monocrystalline | 255 | 8.05* | 78 |
12 | Isofoton | ISFP-255 Black | Polycrystalline | 255 | 8.01* | 76 |
13 | Isofoton | ISFT-245 | Monocrystalline | 245 | 7.96* | 73 |
14 | Isofoton | ISF-250 | Monocrystalline | 250 | 7.95* | 73 |
15 | Isofoton | ISF-250 Black | Monocrystalline | 250 | 7.88* | 70 |
16 | Isofoton | ISFP-250 White | Polycrystalline | 250 | 7.88* | 70 |
17 | Isofoton | ISFP-250 Black | Polycrystalline | 250 | 7.85* | 68 |
18 | Isofoton | ISF-245 | Monocrystalline | 245 | 7.82* | 67 |
19 | Isofoton | ISF-245 Black | Monocrystalline | 245 | 7.73* | 62 |
20 | Isofoton | ISF-255 Clear | Monocrystalline | 255 | 7.66* | 57 |
21 | Isofoton | ISF-240 | Monocrystalline | 240 | 7.66* | 57 |
22 | Isofoton | ISF-235 | Monocrystalline | 235 | 7.52* | 49 |
23 | Isofoton | ISFP-245 Black | Polycrystalline | 245 | 7.50* | 48 |
24 | Isofoton | ISF-250 Clear | Monocrystalline | 250 | 7.49* | 47 |
25 | Isofoton | ISFP-245 White | Polycrystalline | 245 | 7.44* | 44 |
26 | Isofoton | ISFP-240 Black | Polycrystalline | 240 | 7.35* | 39 |
27 | Isofoton | ISF-245 Clear | Monocrystalline | 245 | 7.34* | 38 |
28 | Isofoton | ISFP-240 White | Polycrystalline | 240 | 7.30* | 36 |
29 | Isofoton | IS-220/32 | Monocrystalline | 220 | 6.55* | 8 |
30 | Isofoton | IS-215/32 | Monocrystalline | 215 | 6.39* | 6 |
31 | Isofoton | IS-210/32 | Monocrystalline | 210 | 6.25* | 5 |
* 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.