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 Solar Power (SPI)

Here are the PSI Ratings for modules from Solar Power (SPI), 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
1Solar Power (SPI)ES260PAFBPolycrystalline2608.23*84
2Solar Power (SPI)ES260PAFWPolycrystalline2608.23*84
3Solar Power (SPI)ES260PABBPolycrystalline2608.14*81
4Solar Power (SPI)ES260PABWPolycrystalline2608.14*81
5Solar Power (SPI)ES255PAFBPolycrystalline2558.05*78
6Solar Power (SPI)ES255PAFWPolycrystalline2558.05*78
7Solar Power (SPI)ES255PABBPolycrystalline2557.98*74
8Solar Power (SPI)ES255PABWPolycrystalline2557.98*74
9Solar Power (SPI)ES250PAFBPolycrystalline2507.90*71
10Solar Power (SPI)ES250PAFWPolycrystalline2507.90*71
11Solar Power (SPI)ES250PABWPolycrystalline2507.83*67
12Solar Power (SPI)ES250PABBPolycrystalline2507.83*67
13Solar Power (SPI)ES245PAFBPolycrystalline2457.74*62
14Solar Power (SPI)ES245PAFWPolycrystalline2457.74*62
15Solar Power (SPI)ES245PABBPolycrystalline2457.66*58
16Solar Power (SPI)ES245PABWPolycrystalline2457.66*58
17Solar Power (SPI)SP245FPB2-01Polycrystalline2457.49*47
18Solar Power (SPI)SP240FPC2Polycrystalline2407.48*47
19Solar Power (SPI)SP210FP42Polycrystalline2107.44*44
20Solar Power (SPI)SP210FP52Polycrystalline2107.40*41
21Solar Power (SPI)SP210FPA2Polycrystalline2107.38*40
22Solar Power (SPI)SP210FP12Polycrystalline2107.37*40
23Solar Power (SPI)SP230FP82Polycrystalline2307.35*39
24Solar Power (SPI)SP240FPB2-01Polycrystalline2407.35*39
25Solar Power (SPI)SP210FM12Monocrystalline2107.35*39
26Solar Power (SPI)SP210FM52Monocrystalline2107.34*38
27Solar Power (SPI)SP235FPC2Polycrystalline2357.33*37
28Solar Power (SPI)SP230FP52Polycrystalline2307.33*38
29Solar Power (SPI)SP210FP82Polycrystalline2107.31*37
30Solar Power (SPI)SP230FPA2Polycrystalline2307.29*35
31Solar Power (SPI)SP235FPA2-02Polycrystalline2357.29*35
32Solar Power (SPI)SP230FP12Polycrystalline2307.27*34
33Solar Power (SPI)SP205FP42Polycrystalline2057.27*34
34Solar Power (SPI)SP205FP52Polycrystalline2057.23*32
35Solar Power (SPI)SP205FPA2Polycrystalline2057.21*31
36Solar Power (SPI)SP205FP12Polycrystalline2057.21*31
37Solar Power (SPI)SP235FPB2-01Polycrystalline2357.19*30
38Solar Power (SPI)SP205FM12Monocrystalline2057.18*29
39Solar Power (SPI)SP225FP82Polycrystalline2257.18*29
40Solar Power (SPI)SP225FP52Polycrystalline2257.17*29
41Solar Power (SPI)SP180FM12Monocrystalline1807.17*29
42Solar Power (SPI)SP205FM52Monocrystalline2057.17*29
43Solar Power (SPI)SP230FPC2Polycrystalline2307.17*29
44Solar Power (SPI)SP230FPA2-02Polycrystalline2307.14*27
45Solar Power (SPI)SP205FP82Polycrystalline2057.14*27
46Solar Power (SPI)SP225FPA2Polycrystalline2257.13*27
47Solar Power (SPI)SP225FP12Polycrystalline2257.10*26
48Solar Power (SPI)SP210FPB2-01Polycrystalline2107.09*25
49Solar Power (SPI)SP200FP42Polycrystalline2007.09*25
50Solar Power (SPI)SP200FP52Polycrystalline2007.05*24
51Solar Power (SPI)SP230FPB2-0Polycrystalline2307.04*23
52Solar Power (SPI)SP220FP82Polycrystalline2207.03*22
53Solar Power (SPI)SP200FPA2Polycrystalline2007.03*22
54Solar Power (SPI)SP200FP12Polycrystalline2007.02*22
55Solar Power (SPI)SP220FP52Polycrystalline2207.01*22
56Solar Power (SPI)SP200FM12Monocrystalline2007.00*21
57Solar Power (SPI)SP200FM52Monocrystalline2006.99*21
58Solar Power (SPI)SP225FPA2-02Polycrystalline2256.98*20
59Solar Power (SPI)SP175FM12Monocrystalline1756.98*21
60Solar Power (SPI)SP200FP82Polycrystalline2006.97*20
61Solar Power (SPI)SP220FPA2Polycrystalline2206.97*20
62Solar Power (SPI)SP220FP12Polycrystalline2206.95*19
63Solar Power (SPI)SP180FM52Monocrystalline1806.93*18
64Solar Power (SPI)SP205FPB2-01Polycrystalline2056.93*18
65Solar Power (SPI)SP195FP42Polycrystalline1956.91*18
66Solar Power (SPI)SP225FPB2-01Polycrystalline2256.89*17
67Solar Power (SPI)SP195FP52Polycrystalline1956.89*17
68Solar Power (SPI)SP195FP12Polycrystalline1956.86*16
69Solar Power (SPI)SP195FM12Monocrystalline1956.84*16
70Solar Power (SPI)SP195FM52Monocrystalline1956.82*15
71Solar Power (SPI)SP195FP82Polycrystalline1956.81*14
72Solar Power (SPI)SP220FPA2-02Polycrystalline2206.81*15
73Solar Power (SPI)SP220FPB2-01Polycrystalline2206.79*14
74Solar Power (SPI)SP170FM12Monocrystalline1706.79*14
75Solar Power (SPI)SP175FM52Monocrystalline1756.75*13
76Solar Power (SPI)SP200FPB2-01Polycrystalline2006.74*12
77Solar Power (SPI)SP190FP52Polycrystalline1906.73*12
78Solar Power (SPI)SP190FP12Polycrystalline1906.70*12
79Solar Power (SPI)SP190FM52Monocrystalline1906.67*11
80Solar Power (SPI)SP170FM52Monocrystalline1706.55*8
81Solar Power (SPI)SP165FM52Monocrystalline1656.36*6
82Solar Power (SPI)SP170FM22Monocrystalline1706.25*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.