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 American Solar Wholesale

Here are the PSI Ratings for modules from American Solar Wholesale, 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	American Solar Wholesale	ASW-245M	Monocrystalline	245	8.34*	88
2	American Solar Wholesale	ASW-240M-60	Monocrystalline	240	8.17*	82
3	American Solar Wholesale	ASW-280M	Monocrystalline	280	8.08*	79
4	American Solar Wholesale	ASW-235P	Polycrystalline	235	8.07*	78
5	American Solar Wholesale	ASW-235M	Monocrystalline	235	8.00*	75
6	American Solar Wholesale	ASW-275M	Monocrystalline	275	7.92*	72
7	American Solar Wholesale	ASW-230P	Polycrystalline	230	7.89*	70
8	American Solar Wholesale	ASW-230M	Monocrystalline	230	7.84*	67
9	American Solar Wholesale	ASW-300P	Polycrystalline	300	7.75*	63
10	American Solar Wholesale	ASW-225P	Polycrystalline	225	7.71*	61
11	American Solar Wholesale	ASW-300M	Monocrystalline	300	7.70*	60
12	American Solar Wholesale	ASW-225M	Monocrystalline	225	7.66*	58
13	American Solar Wholesale	ASW-295P	Polycrystalline	295	7.62*	55
14	American Solar Wholesale	ASW-265M	Monocrystalline	265	7.62*	55
15	American Solar Wholesale	ASW-250M	Monocrystalline	250	7.61*	55
16	American Solar Wholesale	ASW-295M	Monocrystalline	295	7.58*	53
17	American Solar Wholesale	ASW-270M	Monocrystalline	270	7.56*	51
18	American Solar Wholesale	ASW-220P	Polycrystalline	220	7.54*	50
19	American Solar Wholesale	ASW-245P	Polycrystalline	245	7.52*	49
20	American Solar Wholesale	ASW-290P	Polycrystalline	290	7.49*	47
21	American Solar Wholesale	ASW-260M	Monocrystalline	260	7.46*	45
22	American Solar Wholesale	ASW-290M	Monocrystalline	290	7.44*	44
23	American Solar Wholesale	ASW-215P	Polycrystalline	215	7.37*	40
24	American Solar Wholesale	ASW-240P	Polycrystalline	240	7.37*	39
25	American Solar Wholesale	ASW-285P	Polycrystalline	285	7.36*	39
26	American Solar Wholesale	ASW-285M	Monocrystalline	285	7.32*	37
27	American Solar Wholesale	ASW-270P	Polycrystalline	270	7.24*	33
28	American Solar Wholesale	ASW-185M	Monocrystalline	185	7.24*	33
29	American Solar Wholesale	ASW-280P	Polycrystalline	280	7.22*	32
30	American Solar Wholesale	ASW-180M	Monocrystalline	180	7.04*	23
31	American Solar Wholesale	ASW-260P	Polycrystalline	260	6.97*	20
32	American Solar Wholesale	ASW-175M	Monocrystalline	175	6.85*	16
33	American Solar Wholesale	ASW-250P	Polycrystalline	250	6.70*	12

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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.