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 CSG PVTech

Here are the PSI Ratings for modules from CSG PVTech, 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	CSG PVTech	CSG265S2	Monocrystalline	265	8.22*	84
2	CSG PVTech	CSG260S2	Monocrystalline	260	8.10*	80
3	CSG PVTech	CSG305S2	Monocrystalline	305	8.03*	77
4	CSG PVTech	CSG255S2	Monocrystalline	255	7.93*	72
5	CSG PVTech	CSG300S2	Monocrystalline	300	7.92*	72
6	CSG PVTech	CSG300M2	Polycrystalline	300	7.85*	68
7	CSG PVTech	CSG295S2	Monocrystalline	295	7.80*	65
8	CSG PVTech	CSG250S2	Monocrystalline	250	7.75*	63
9	CSG PVTech	CSG295M2	Polycrystalline	295	7.72*	61
10	CSG PVTech	CSG195S1	Monocrystalline	195	7.71*	60
11	CSG PVTech	CSG290S2	Monocrystalline	290	7.69*	59
12	CSG PVTech	CSG245M2	Polycrystalline	245	7.65*	57
13	CSG PVTech	CSG245S2	Monocrystalline	245	7.63*	56
14	CSG PVTech	CSG290M2	Polycrystalline	290	7.59*	53
15	CSG PVTech	CSG285S2	Monocrystalline	285	7.56*	52
16	CSG PVTech	CSG240S2	Monocrystalline	240	7.51*	48
17	CSG PVTech	CSG190S1	Monocrystalline	190	7.51*	49
18	CSG PVTech	CSG240M2	Polycrystalline	240	7.49*	47
19	CSG PVTech	CSG285M2	Polycrystalline	285	7.45*	45
20	CSG PVTech	CSG280M2-36	Polycrystalline	280	7.42*	42
21	CSG PVTech	CSG235S2	Monocrystalline	235	7.36*	39
22	CSG PVTech	CSG235M2	Polycrystalline	235	7.34*	38
23	CSG PVTech	CSG185S1	Monocrystalline	185	7.29*	35
24	CSG PVTech	CSG275M2-36	Polycrystalline	275	7.28*	35
25	CSG PVTech	CSG180S1-36	Monocrystalline	180	7.20*	30
26	CSG PVTech	CSG230M2-30	Polycrystalline	230	7.19*	30
27	CSG PVTech	CSG205M2-27	Polycrystalline	205	7.17*	29
28	CSG PVTech	CSG270M2-36	Polycrystalline	270	7.15*	28
29	CSG PVTech	CSG180M2-24	Polycrystalline	180	7.05*	23
30	CSG PVTech	CSG225M2-30	Polycrystalline	225	7.03*	22
31	CSG PVTech	CSG265M2-35	Polycrystalline	265	7.00*	21
32	CSG PVTech	CSG175S1-36	Monocrystalline	175	6.99*	21
33	CSG PVTech	CSG200M2-27	Polycrystalline	200	6.99*	21
34	CSG PVTech	CSG220M2-30	Polycrystalline	220	6.87*	16
35	CSG PVTech	CSG175M2-24	Polycrystalline	175	6.86*	16
36	CSG PVTech	CSG260M2-35	Polycrystalline	260	6.86*	16
37	CSG PVTech	CSG195M2-27	Polycrystalline	195	6.82*	15
38	CSG PVTech	CSG255M2-35	Polycrystalline	255	6.73*	12
39	CSG PVTech	CSG170M2-24	Polycrystalline	170	6.67*	11
40	CSG PVTech	CSG190M2-27	Polycrystalline	190	6.65*	10
41	CSG PVTech	CSG250M2-35	Polycrystalline	250	6.60*	9
42	CSG PVTech	CSG165M2-24	Polycrystalline	165	6.40*	6
43	CSG PVTech	CSG160M2-24	Polycrystalline	160	6.21*	4

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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.