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.

Subscribe to our email list

Before using the PSI Ratings, you should subscribe to our email list to receive important updates from the Principal Solar Institute.

PSI Ratings – PV Solar Modules from Solar Semiconductor

Here are the PSI Ratings for modules from Solar Semiconductor, 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 SemiconductorSSI-3M6-235Polycrystalline2357.33*38
2Solar SemiconductorSSI-M6-235Polycrystalline2357.21*31
3Solar SemiconductorSSI-3M6-230Polycrystalline2307.18*29
4Solar SemiconductorSSI-S6-210Monocrystalline2107.15*28
5Solar SemiconductorSSI-S6-145Monocrystalline1457.10*26
6Solar SemiconductorSSI-S6-235Monocrystalline2357.09*25
7Solar SemiconductorSSI-M6-230Polycrystalline2307.06*24
8Solar SemiconductorSSI-3M6-225Polycrystalline2257.03*22
9Solar SemiconductorSSI-S6-205Monocrystalline2056.98*20
10Solar SemiconductorSSI-S6-280Monocrystalline2806.95*19
11Solar SemiconductorSSI-S6-230Monocrystalline2306.94*19
12Solar SemiconductorSSI-M6-225Polycrystalline2256.91*18
13Solar SemiconductorSSI-S6-185Monocrystalline1856.89*17
14Solar SemiconductorSSI-3M6-220Polycrystalline2206.87*16
15Solar SemiconductorSSI-S6-140Monocrystalline1406.86*16
16Solar SemiconductorSSI-S6-275Monocrystalline2756.83*15
17Solar SemiconductorSSI-S6-200Monocrystalline2006.81*14
18Solar SemiconductorSSI-S6-225Monocrystalline2256.79*14
19Solar SemiconductorSSI-M6-220Polycrystalline2206.75*13
20Solar SemiconductorSSI-S6-180Monocrystalline1806.71*12
21Solar SemiconductorSSI-S6-270Monocrystalline2706.71*12
22Solar SemiconductorSSI-3M6-215Polycrystalline2156.71*12
23Solar SemiconductorSSI-S6-195Monocrystalline1956.64*10
24Solar SemiconductorSSI-S6-220Monocrystalline2206.63*10
25Solar SemiconductorSSI-S6-135Monocrystalline1356.61*9
26Solar SemiconductorSSI-M6-215Polycrystalline2156.60*9
27Solar SemiconductorSSI-S6-265Monocrystalline2656.58*9
28Solar SemiconductorSSI-S6-175Monocrystalline1756.53*8
29Solar SemiconductorSSI-S6-215Monocrystalline2156.49*7
30Solar SemiconductorSSI-S6-190Monocrystalline1906.47*7
31Solar SemiconductorSSI-S6-260Monocrystalline2606.47*7
32Solar SemiconductorSSI-S6-170Monocrystalline1706.29*5
33Solar SemiconductorSSI-S6-130Monocrystalline1305.72*2
34Solar SemiconductorSSI-S6-125Monocrystalline1255.50*2

* 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.