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 Solar Liberty, 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 | Solar Liberty | SLX 330 USC | Polycrystalline | 330 | 8.60* | 92 |
2 | Solar Liberty | SLX 330 USMD | Monocrystalline | 330 | 8.55* | 92 |
3 | Solar Liberty | SLX 330 USMC | Monocrystalline | 330 | 8.55* | 92 |
4 | Solar Liberty | SLX 325 USC | Polycrystalline | 325 | 8.47* | 90 |
5 | Solar Liberty | SLX 325 USMC | Monocrystalline | 325 | 8.43* | 90 |
6 | Solar Liberty | SLX 325 USMD | Monocrystalline | 325 | 8.43* | 90 |
7 | Solar Liberty | SLX 270 USMC | Monocrystalline | 270 | 8.38* | 88 |
8 | Solar Liberty | SLX 270 USMD | Monocrystalline | 270 | 8.38* | 88 |
9 | Solar Liberty | SLX 320 USC | Polycrystalline | 320 | 8.34* | 88 |
10 | Solar Liberty | SLX 320 USMC | Monocrystalline | 320 | 8.29* | 86 |
11 | Solar Liberty | SLX 320 USMD | Monocrystalline | 320 | 8.29* | 86 |
12 | Solar Liberty | SLX 270 USB | Polycrystalline | 270 | 8.27* | 86 |
13 | Solar Liberty | SLX 270 USC | Polycrystalline | 270 | 8.22* | 84 |
14 | Solar Liberty | SLX 270 USD | Polycrystalline | 270 | 8.22* | 84 |
15 | Solar Liberty | SLX 265 USMD | Monocrystalline | 265 | 8.21* | 84 |
16 | Solar Liberty | SLX 265 USMC | Monocrystalline | 265 | 8.21* | 84 |
17 | Solar Liberty | SLX 265 USB | Polycrystalline | 265 | 8.11* | 80 |
18 | Solar Liberty | SLX 265 USMB | Monocrystalline | 265 | 8.11* | 80 |
19 | Solar Liberty | SLX 315 USMC | Monocrystalline | 315 | 8.09* | 79 |
20 | Solar Liberty | SLX 315 USMD | Monocrystalline | 315 | 8.09* | 79 |
21 | Solar Liberty | SLX 265 USD | Polycrystalline | 265 | 8.07* | 79 |
22 | Solar Liberty | SLX 265 USC | Polycrystalline | 265 | 8.07* | 78 |
23 | Solar Liberty | SLX 310 USC | Polycrystalline | 310 | 8.01* | 76 |
24 | Solar Liberty | SLX 260 USB | Polycrystalline | 260 | 7.97* | 74 |
25 | Solar Liberty | SLX 310 USMD | Monocrystalline | 310 | 7.96* | 73 |
26 | Solar Liberty | SLX 310 USMC | Monocrystalline | 310 | 7.96* | 73 |
27 | Solar Liberty | SLX 260 USD | Polycrystalline | 260 | 7.91* | 71 |
28 | Solar Liberty | SLX 260 USC | Polycrystalline | 260 | 7.91* | 71 |
29 | Solar Liberty | SLX 245 USC | Polycrystalline | 245 | 7.83* | 67 |
30 | Solar Liberty | SLX 305 USMC | Monocrystalline | 305 | 7.83* | 67 |
31 | Solar Liberty | SLX 305 USMD | Monocrystalline | 305 | 7.83* | 67 |
32 | Solar Liberty | SLX 255 USB | Polycrystalline | 255 | 7.81* | 66 |
33 | Solar Liberty | SLX 255 USD | Polycrystalline | 255 | 7.76* | 63 |
34 | Solar Liberty | SLX 255 USC | Polycrystalline | 255 | 7.76* | 63 |
35 | Solar Liberty | SLX 240 USD | Polycrystalline | 240 | 7.71* | 60 |
36 | Solar Liberty | SLX 240 USC | Polycrystalline | 240 | 7.71* | 60 |
37 | Solar Liberty | SLX 300 USMC | Monocrystalline | 300 | 7.70* | 60 |
38 | Solar Liberty | SLX 300 USMD | Monocrystalline | 300 | 7.70* | 60 |
39 | Solar Liberty | SLX 250 USB | Polycrystalline | 250 | 7.65* | 57 |
40 | Solar Liberty | SLX 250 USC | Polycrystalline | 250 | 7.60* | 54 |
41 | Solar Liberty | SLX 250 USD | Polycrystalline | 250 | 7.60* | 54 |
42 | Solar Liberty | SLX 295 USMC | Monocrystalline | 295 | 7.57* | 52 |
43 | Solar Liberty | SLX 295 USMD | Monocrystalline | 295 | 7.57* | 52 |
44 | Solar Liberty | SLX 235 USC | Polycrystalline | 235 | 7.51* | 48 |
45 | Solar Liberty | SLX 235 USD | Polycrystalline | 235 | 7.51* | 48 |
46 | Solar Liberty | SLX 290 USMD | Monocrystalline | 290 | 7.45* | 45 |
47 | Solar Liberty | SLX 290 USMC | Monocrystalline | 290 | 7.45* | 45 |
48 | Solar Liberty | SLX 235 USB | Polycrystalline | 235 | 7.43* | 43 |
49 | Solar Liberty | SLX285P6-36 | Polycrystalline | 285 | 7.41* | 42 |
50 | Solar Liberty | SLX 245 USB | Polycrystalline | 245 | 7.39* | 41 |
51 | Solar Liberty | SLX 240 USB | Polycrystalline | 240 | 7.35* | 39 |
52 | Solar Liberty | SLX235P6-30 | Polycrystalline | 235 | 7.29* | 35 |
53 | Solar Liberty | SLX280P6-36 | Polycrystalline | 280 | 7.28* | 35 |
54 | Solar Liberty | SLX230P6-30 | Polycrystalline | 230 | 7.14* | 27 |
55 | Solar Liberty | SLX275P6-36 | Polycrystalline | 275 | 7.14* | 27 |
56 | Solar Liberty | SLX140P6-18 | Polycrystalline | 140 | 7.07* | 24 |
57 | Solar Liberty | SLX270P6-36 | Polycrystalline | 270 | 7.02* | 22 |
58 | Solar Liberty | SLX225P6-30 | Polycrystalline | 225 | 6.98* | 20 |
59 | Solar Liberty | SLX265P6-36 | Polycrystalline | 265 | 6.88* | 17 |
60 | Solar Liberty | SLX135P6-18 | Polycrystalline | 135 | 6.83* | 15 |
61 | Solar Liberty | SLX220P6-30 | Polycrystalline | 220 | 6.81* | 15 |
62 | Solar Liberty | SLX260P6-36 | Polycrystalline | 260 | 6.76* | 13 |
63 | Solar Liberty | SLX215P6-30 | Polycrystalline | 215 | 6.65* | 10 |
64 | Solar Liberty | SLX255P6-36 | Polycrystalline | 255 | 6.63* | 10 |
65 | Solar Liberty | SLX130P6-18 | Polycrystalline | 130 | 6.56* | 9 |
66 | Solar Liberty | SLX210P6-30 | Polycrystalline | 210 | 6.50* | 7 |
67 | Solar Liberty | SLX250P6-36 | Polycrystalline | 250 | 6.49* | 7 |
68 | Solar Liberty | SLX245P6-36 | Polycrystalline | 245 | 6.36* | 6 |
69 | Solar Liberty | SLX205P6-30 | Polycrystalline | 205 | 6.34* | 6 |
70 | Solar Liberty | SLX125P6-18 | Polycrystalline | 125 | 6.31* | 5 |
71 | Solar Liberty | SLX240P6-36 | Polycrystalline | 240 | 6.24* | 5 |
72 | Solar Liberty | SLX200P6-30 | Polycrystalline | 200 | 6.19* | 4 |
73 | Solar Liberty | SLX120P6-18 | Polycrystalline | 120 | 6.06* | 3 |
* 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.