Principal Solar Institute

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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 Helios Energy Europe

Here are the PSI Ratings for modules from Helios Energy Europe, 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
1Helios Energy Europe60M290Monocrystalline2909.57*98
2Helios Energy Europe72M345Monocrystalline3459.46*98
3Helios Energy Europe60M285Monocrystalline2859.44*98
4Helios Energy Europe72M340Monocrystalline3409.32*98
5Helios Energy Europe60M280Monocrystalline2809.28*97
6Helios Energy Europe72M335Monocrystalline3359.18*97
7Helios Energy Europe60M275Monocrystalline2759.11*97
8Helios Energy Europe72M330Monocrystalline3309.06*97
9Helios Energy Europe60M270Monocrystalline2708.95*96
10Helios Energy Europe72M325Monocrystalline3258.92*96
11Helios Energy Europe72P320Polycrystalline3208.85*95
12Helios Energy Europe72M320Monocrystalline3208.79*95
13Helios Energy Europe72P315Polycrystalline3158.67*94
14Helios Energy Europe72M315Monocrystalline3158.64*93
15Helios Energy Europe72P310Polycrystalline3108.54*92
16Helios Energy Europe72P305Polycrystalline3058.39*89
17Helios Energy Europe72P290Polycrystalline2908.36*88
18Helios Energy Europe72P300Polycrystalline3008.25*85
19Helios Energy Europe72P285Polycrystalline2858.25*85
20Helios Energy Europe96M420Monocrystalline4208.23*84
21Helios Energy Europe96M415Monocrystalline4158.13*81
22Helios Energy Europe96M410Monocrystalline4108.03*77
23Helios Energy Europe60M265Monocrystalline2657.97*74
24Helios Energy Europe96M405Monocrystalline4057.94*72
25Helios Energy Europe60M260Monocrystalline2607.93*72
26Helios Energy Europe72M310Monocrystalline3107.89*70
27Helios Energy Europe60P255Polycrystalline2557.84*68
28Helios Energy Europe96M400Monocrystalline4007.84*68
29Helios Energy EuropeHEE300MA78Monocrystalline3007.79*65
30Helios Energy Europe72M305Monocrystalline3057.77*64
31Helios Energy Europe60M255Monocrystalline2557.77*64
32Helios Energy Europe96M395Monocrystalline3957.74*62
33Helios Energy Europe60P250Polycrystalline2507.72*61
34Helios Energy EuropeHEE300MA77Monocrystalline2957.67*58
35Helios Energy Europe96M390Monocrystalline3907.64*56
36Helios Energy EuropeHEE215MA68Monocrystalline2507.62*55
37Helios Energy EuropeHEE215MMonocrystalline2407.60*54
38Helios Energy Europe60M250Monocrystalline2507.59*54
39Helios Energy Europe60P245Polycrystalline2457.57*52
40Helios Energy EuropeHEE300MA76Monocrystalline2907.54*50
41Helios Energy EuropeHEE300MMonocrystalline2907.54*50
42Helios Energy EuropeHEE215MA67Monocrystalline2457.52*49
43Helios Energy EuropeHEE300MA75Monocrystalline2857.42*42
44Helios Energy Europe60P240Polycrystalline2407.42*43
45Helios Energy EuropeHEE215MA66Monocrystalline2407.35*39
46Helios Energy EuropeHEE300MA74Monocrystalline2807.28*35
47Helios Energy EuropeHEE215MA65Monocrystalline2357.19*30
48Helios Energy EuropeHEE275AU75Polycrystalline2757.11*26
49Helios Energy EuropeHEE275UPolycrystalline2707.08*24
50Helios Energy EuropeHEE215MA64Monocrystalline2307.04*23
51Helios Energy EuropeHEE210UA65Polycrystalline2307.03*22
52Helios Energy EuropeHEE275AU74Polycrystalline2706.97*20
53Helios Energy EuropeHEE210UPolycrystalline2256.90*17
54Helios Energy EuropeHEE210UA64Polycrystalline2256.90*17
55Helios Energy EuropeHEE275AU73Polycrystalline2656.84*16
56Helios Energy EuropeHEE210UA63Polycrystalline2206.78*14
57Helios Energy EuropeHEE275AU72Polycrystalline2606.72*12
58Helios Energy EuropeHEE210UA62Polycrystalline2156.64*10

* 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.