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 Aleo Solar

Here are the PSI Ratings for modules from Aleo Solar, 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
1Aleo SolarS19H270Monocrystalline2708.52*91
2Aleo SolarS79U270Monocrystalline2708.38*89
3Aleo SolarS19H265Monocrystalline2658.37*88
4Aleo SolarS18U260Polycrystalline2608.25*85
5Aleo SolarS79U265Monocrystalline2658.23*84
6Aleo SolarS19H260Monocrystalline2608.21*84
7Aleo SolarS18U255Polycrystalline2558.09*79
8Aleo SolarS79U260Monocrystalline2608.08*79
9Aleo SolarS19H255Monocrystalline2558.05*78
10Aleo SolarS79U255Monocrystalline2557.93*72
11Aleo SolarS18U250Polycrystalline2507.93*72
12Aleo SolarS19H250Monocrystalline2507.89*70
13Aleo SolarS18U245Polycrystalline2457.77*64
14Aleo SolarS79U250Monocrystalline2507.77*64
15Aleo SolarS19U255 ulrMonocrystalline2557.76*63
16Aleo SolarS18U245 ulrPolycrystalline2457.69*59
17Aleo SolarA18U245 ulrPolycrystalline2457.69*59
18Aleo SolarS79.250Monocrystalline2507.66*57
19Aleo SolarA79.250Monocrystalline2507.66*57
20Aleo SolarS79U250 ulrMonocrystalline2507.65*57
21Aleo SolarA79U250 ulrMonocrystalline2507.65*57
22Aleo SolarS19U250 ulrMonocrystalline2507.62*55
23Aleo SolarS18U240Polycrystalline2407.61*54
24Aleo SolarS18.245Polycrystalline2457.58*52
25Aleo SolarA18.245Polycrystalline2457.58*53
26Aleo SolarS19U245 ulrMonocrystalline2457.53*49
27Aleo SolarS18U240 ulrPolycrystalline2407.53*50
28Aleo SolarA18U240 ulrPolycrystalline2407.53*50
29Aleo SolarA79.245Monocrystalline2457.49*47
30Aleo SolarS79.245Monocrystalline2457.49*47
31Aleo SolarS79U245 ulrMonocrystalline2457.48*47
32Aleo SolarA79U245 ulrMonocrystalline2457.48*47
33Aleo SolarS18.240Polycrystalline2407.42*43
34Aleo SolarA18.240Polycrystalline2407.42*43
35Aleo SolarA18U235 ulrPolycrystalline2357.39*41
36Aleo SolarS18U235 ulrPolycrystalline2357.39*41
37Aleo SolarA79U240 ulrMonocrystalline2407.36*39
38Aleo SolarS79U240 ulrMonocrystalline2407.36*39
39Aleo SolarS19U240 ulrMonocrystalline2407.32*37
40Aleo SolarA18.235Polycrystalline2357.23*32
41Aleo SolarS18.235Polycrystalline2357.23*32
42Aleo SolarA79.235Monocrystalline2357.21*31
43Aleo SolarS79.235Monocrystalline2357.21*31
44Aleo SolarA18U230 ulrPolycrystalline2307.20*30
45Aleo SolarS18U230 ulrPolycrystalline2307.20*30
46Aleo SolarA79U235 ulrMonocrystalline2357.20*31
47Aleo SolarS79U235 ulrMonocrystalline2357.20*31
48Aleo SolarS19U235 ulrMonocrystalline2357.16*28
49Aleo SolarA18.230Polycrystalline2307.15*28
50Aleo SolarS79.230Monocrystalline2307.05*24
51Aleo SolarA79.230Monocrystalline2307.05*23
52Aleo SolarS79U230 ulrMonocrystalline2307.04*23
53Aleo SolarA79U230 ulrMonocrystalline2307.04*23
54Aleo SolarS18U225 ulrPolycrystalline2257.04*23
55Aleo SolarA18U225 ulrPolycrystalline2257.04*23
56Aleo SolarA18.225Polycrystalline2256.99*21
57Aleo SolarS18U220 ulrPolycrystalline2206.86*16
58Aleo SolarA18U220 ulrPolycrystalline2206.86*16
59Aleo SolarA18.220Polycrystalline2206.83*15
60Aleo SolarA18U215 ulrPolycrystalline2156.69*11
61Aleo SolarS18U215 ulrPolycrystalline2156.69*11
62Aleo SolarA18.215Polycrystalline2156.67*11
63Aleo SolarS18U210 ulrPolycrystalline2106.54*8
64Aleo SolarA18U210 ulrPolycrystalline2106.54*8
65Aleo SolarA18.210Polycrystalline2106.51*8

* 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.