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 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
1	Solar Semiconductor	SSI-3M6-235	Polycrystalline	235	7.33*	38
2	Solar Semiconductor	SSI-M6-235	Polycrystalline	235	7.21*	31
3	Solar Semiconductor	SSI-3M6-230	Polycrystalline	230	7.18*	29
4	Solar Semiconductor	SSI-S6-210	Monocrystalline	210	7.15*	28
5	Solar Semiconductor	SSI-S6-145	Monocrystalline	145	7.10*	26
6	Solar Semiconductor	SSI-S6-235	Monocrystalline	235	7.09*	25
7	Solar Semiconductor	SSI-M6-230	Polycrystalline	230	7.06*	24
8	Solar Semiconductor	SSI-3M6-225	Polycrystalline	225	7.03*	22
9	Solar Semiconductor	SSI-S6-205	Monocrystalline	205	6.98*	20
10	Solar Semiconductor	SSI-S6-280	Monocrystalline	280	6.95*	19
11	Solar Semiconductor	SSI-S6-230	Monocrystalline	230	6.94*	19
12	Solar Semiconductor	SSI-M6-225	Polycrystalline	225	6.91*	18
13	Solar Semiconductor	SSI-S6-185	Monocrystalline	185	6.89*	17
14	Solar Semiconductor	SSI-3M6-220	Polycrystalline	220	6.87*	16
15	Solar Semiconductor	SSI-S6-140	Monocrystalline	140	6.86*	16
16	Solar Semiconductor	SSI-S6-275	Monocrystalline	275	6.83*	15
17	Solar Semiconductor	SSI-S6-200	Monocrystalline	200	6.81*	14
18	Solar Semiconductor	SSI-S6-225	Monocrystalline	225	6.79*	14
19	Solar Semiconductor	SSI-M6-220	Polycrystalline	220	6.75*	13
20	Solar Semiconductor	SSI-S6-180	Monocrystalline	180	6.71*	12
21	Solar Semiconductor	SSI-S6-270	Monocrystalline	270	6.71*	12
22	Solar Semiconductor	SSI-3M6-215	Polycrystalline	215	6.71*	12
23	Solar Semiconductor	SSI-S6-195	Monocrystalline	195	6.64*	10
24	Solar Semiconductor	SSI-S6-220	Monocrystalline	220	6.63*	10
25	Solar Semiconductor	SSI-S6-135	Monocrystalline	135	6.61*	9
26	Solar Semiconductor	SSI-M6-215	Polycrystalline	215	6.60*	9
27	Solar Semiconductor	SSI-S6-265	Monocrystalline	265	6.58*	9
28	Solar Semiconductor	SSI-S6-175	Monocrystalline	175	6.53*	8
29	Solar Semiconductor	SSI-S6-215	Monocrystalline	215	6.49*	7
30	Solar Semiconductor	SSI-S6-190	Monocrystalline	190	6.47*	7
31	Solar Semiconductor	SSI-S6-260	Monocrystalline	260	6.47*	7
32	Solar Semiconductor	SSI-S6-170	Monocrystalline	170	6.29*	5
33	Solar Semiconductor	SSI-S6-130	Monocrystalline	130	5.72*	2
34	Solar Semiconductor	SSI-S6-125	Monocrystalline	125	5.50*	2

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* 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.