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 DJ Solar

Here are the PSI Ratings for modules from DJ 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
1DJ SolarDJS-T300P672PTPolycrystalline3008.01*76
2DJ SolarDJS-T305S6STMonocrystalline3057.99*75
3DJ SolarDJS-T275S666STMonocrystalline2757.86*68
4DJ SolarDJS-T300S6STMonocrystalline3007.85*68
5DJ SolarDJS-T295P672PTPolycrystalline2957.83*67
6DJ SolarDJS-T200S648STMonocrystalline2007.83*67
7DJ SolarDJS-T250STMonocrystalline2507.82*67
8DJ SolarDJS-T225S654STMonocrystalline2257.81*66
9DJ SolarDJS-T250P660PTPolycrystalline2507.79*65
10DJ SolarDJS-T290P672PTPolycrystalline2907.74*62
11DJ SolarDJS-T295S6STMonocrystalline2957.73*62
12DJ SolarDJS-T270S666STMonocrystalline2707.72*61
13DJ SolarDJS-T270P666PTPolycrystalline2707.71*61
14DJ SolarDJS-T245S6STMonocrystalline2457.67*58
15DJ SolarDJS-T245P660PTPolycrystalline2457.67*58
16DJ SolarDJS195S125M-72Monocrystalline1957.64*56
17DJ SolarDJS-T195S648STMonocrystalline1957.64*56
18DJ SolarDJS-T220S6STMonocrystalline2207.64*56
19DJ SolarDJS-T290S6STMonocrystalline2907.59*53
20DJ SolarDJS-T265S666STMonocrystalline2657.58*53
21DJ SolarDJS-T265P666PTPolycrystalline2657.54*50
22DJ SolarDJS-T285P6PTPolycrystalline2857.53*49
23DJ SolarDJS-T240PTPolycrystalline2407.51*48
24DJ SolarDJS-T240S6STMonocrystalline2407.49*47
25DJ SolarDJS-T215S6STMonocrystalline2157.47*46
26DJ SolarDJS-T285S6STMonocrystalline2857.46*46
27DJ SolarDJS-T260P666PTPolycrystalline2607.45*45
28DJ SolarDJS190S125M-72Monocrystalline1907.44*44
29DJ SolarDJS-T260S6STMonocrystalline2607.44*44
30DJ SolarDJS-T190S6STMonocrystalline1907.43*44
31DJ SolarDJS240S156P-60Polycrystalline2407.40*41
32DJ SolarDJS-T235S6STMonocrystalline2357.33*38
33DJ SolarDJS-T280S6STMonocrystalline2807.33*38
34DJ SolarDJS-TU235PTPolycrystalline2357.32*37
35DJ SolarDJS-T255P666PTPolycrystalline2557.32*37
36DJ SolarDJS-T280P6PTPolycrystalline2807.31*36
37DJ SolarDJS235S156P-60Polycrystalline2357.26*33
38DJ SolarDJS185S125M-72Monocrystalline1857.25*33
39DJ SolarDJS-T185S6STMonocrystalline1857.22*32
40DJ SolarDJS-T210S6STMonocrystalline2107.19*30
41DJ SolarDJS225S156P-60Polycrystalline2257.19*30
42DJ SolarDJS-T275P6PTPolycrystalline2757.18*29
43DJ SolarDJS180S125M-72Monocrystalline1807.17*29
44DJ SolarDJS-T230P6PTPolycrystalline2307.14*27
45DJ SolarDJS-T250P6PTPolycrystalline2407.14*27
46DJ SolarDJS230S156P-60Polycrystalline2307.09*25
47DJ SolarDJS-T270P6PTPolycrystalline2707.04*23
48DJ SolarDJS220S156P-60Polycrystalline2207.03*22
49DJ SolarDJS-T180S6STMonocrystalline1807.02*22
50DJ SolarDJS-T205S6STMonocrystalline2057.01*22
51DJ SolarDJS-T245P6PTPolycrystalline2457.00*21
52DJ SolarDJS215S156P-60Polycrystalline2156.99*21
53DJ SolarDJS-T225P6PTPolycrystalline2256.98*20
54DJ SolarDJS175S125M-72Monocrystalline1756.98*20
55DJ SolarDJS-T265P6PTPolycrystalline2656.90*17
56DJ SolarDJS-T240P6PTPolycrystalline2406.85*16
57DJ SolarDJS-T220P6PTPolycrystalline2206.82*15
58DJ SolarDJS210S156P-60Polycrystalline2106.82*15
59DJ SolarDJS-T260P6PTPolycrystalline2606.77*13
60DJ SolarDJS-T215P6PTPolycrystalline2156.66*11
61DJ SolarDJS-T255P6PTPolycrystalline2556.64*10
62DJ SolarDJS-T210P6PTPolycrystalline2106.52*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.