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 First Solar

Here are the PSI Ratings for modules from First 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
1	First Solar	FS-4112-2	Thin Film	113	8.58*	92
2	First Solar	FS-4112A-2	Thin Film	113	8.58*	92
3	First Solar	FS-4110A-2	Thin Film	110	8.44*	90
4	First Solar	FS-4110-2	Thin Film	110	8.44*	90
5	First Solar	FS-4107A-2	Thin Film	108	8.25*	85
6	First Solar	FS-4107-2	Thin Film	108	8.25*	85
7	First Solar	FS-4105-2	Thin Film	105	8.03*	77
8	First Solar	FS-4105A-2	Thin Film	105	8.03*	77
9	First Solar	FS-4102-2	Thin Film	103	7.85*	68
10	First Solar	FS-4102A-2	Thin Film	103	7.85*	68
11	First Solar	FS-3100-Plus	Thin Film	100	7.82*	67
12	First Solar	FS-4117-2	Thin Film	118	7.80*	66
13	First Solar	FS-4117A-2	Thin Film	118	7.80*	66
14	First Solar	FS-4100-2	Thin Film	100	7.67*	58
15	First Solar	FS-4100A-2	Thin Film	100	7.67*	58
16	First Solar	FS-397-Plus	Thin Film	98	7.65*	57
17	First Solar	FS-4115A-2	Thin Film	115	7.59*	54
18	First Solar	FS-4115-2	Thin Film	115	7.59*	54
19	First Solar	FS-395	Thin Film	95	7.56*	52
20	First Solar	FS-395-Plus	Thin Film	95	7.44*	44
21	First Solar	FS-392	Thin Film	93	7.36*	39
22	First Solar	FS-4105A	Thin Film	105	7.27*	34
23	First Solar	FS-4105	Thin Film	105	7.27*	34
24	First Solar	FS-392-Plus	Thin Film	93	7.26*	34
25	First Solar	FS-4102	Thin Film	103	7.14*	27
26	First Solar	FS-4102A	Thin Film	103	7.14*	27
27	First Solar	FS-390-Plus	Thin Film	90	7.05*	24
28	First Solar	FS-4100	Thin Film	100	6.90*	17
29	First Solar	FS-4100A	Thin Film	100	6.90*	17
30	First Solar	FS-387-Plus	Thin Film	88	6.87*	16
31	First Solar	FS-497A	Thin Film	98	6.74*	12
32	First Solar	FS-497	Thin Film	98	6.74*	12
33	First Solar	FS-390	Thin Film	90	6.71	12
34	First Solar	FS-495A	Thin Film	95	6.57*	9
35	First Solar	FS-495	Thin Film	95	6.57*	9
36	First Solar	FS-387	Thin Film	88	6.53	8
37	First Solar	FS-492	Thin Film	93	6.40*	6
38	First Solar	Fs-492A	Thin Film	93	6.40*	6
39	First Solar	FS-385	Thin Film	85	6.35	6
40	First Solar	FS-280	Thin Film	80	6.35*	6
41	First Solar	FS-380	Thin Film	80	6.28*	5
42	First Solar	FS-490	Thin Film	90	6.26*	5
43	First Solar	FS-490A	Thin Film	90	6.26*	5
44	First Solar	FS-277	Thin Film	78	6.14*	4
45	First Solar	FS-382	Thin Film	83	6.13	4
46	First Solar	FS-377	Thin Film	77	6.11*	4
47	First Solar	FS-275	Thin Film	75	5.97*	3
48	First Solar	FS-375	Thin Film	75	5.89*	3
49	First Solar	FS-270	Thin Film	70	5.85*	3
50	First Solar	FS-272	Thin Film	73	5.79*	3
51	First Solar	FS-372	Thin Film	73	5.66*	2
52	First Solar	FS-370	Thin Film	70	5.46*	2
53	First Solar	FS-267	Thin Film	68	5.44*	2
54	First Solar	FS-367	Thin Film	68	5.24*	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.