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 Innotech Solar

Here are the PSI Ratings for modules from Innotech 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	Innotech Solar	x265	Polycrystalline	265	8.14*	81
2	Innotech Solar	x260	Polycrystalline	260	7.97*	74
3	Innotech Solar	x255	Polycrystalline	255	7.89*	70
4	Innotech Solar	x250	Polycrystalline	250	7.72*	61
5	Innotech Solar	x245	Polycrystalline	245	7.67*	58
6	Innotech Solar	x240	Polycrystalline	240	7.52*	49
7	Innotech Solar	x235	Polycrystalline	235	7.36*	39
8	Innotech Solar	ITS220Fyz4	Polycrystalline	230	7.23*	32
9	Innotech Solar	ITS230XXXX	Polycrystalline	230	7.23*	32
10	Innotech Solar	ITS220Eyz4	Polycrystalline	230	7.23*	32
11	Innotech Solar	ITS220Nxy4	Monocrystalline	230	7.21*	31
12	Innotech Solar	ITS220Mxy4	Monocrystalline	230	7.21*	31
13	Innotech Solar	ITS270Fyz3	Polycrystalline	270	7.17*	29
14	Innotech Solar	ITS270Eyz3	Polycrystalline	270	7.17*	29
15	Innotech Solar	x230	Polycrystalline	230	7.10*	26
16	Innotech Solar	ITS225XXXX	Polycrystalline	225	7.07*	24
17	Innotech Solar	x225	Polycrystalline	225	6.94*	19
18	Innotech Solar	ITS270Fyz2	Polycrystalline	260	6.92*	18
19	Innotech Solar	ITS270Eyz2	Polycrystalline	260	6.92*	18
20	Innotech Solar	ITS270Myz3	Monocrystalline	270	6.91*	18
21	Innotech Solar	ITS270Nyz3	Monocrystalline	270	6.91*	18
22	Innotech Solar	ITS220Fyz3	Polycrystalline	220	6.91*	18
23	Innotech Solar	ITS220Eyz3	Polycrystalline	220	6.91*	18
24	Innotech Solar	ITS220Nyz3	Monocrystalline	220	6.88*	17
25	Innotech Solar	ITS220Myz3	Monocrystalline	220	6.88*	17
26	Innotech Solar	x220	Polycrystalline	220	6.84*	16
27	Innotech Solar	ITS215XXXX	Polycrystalline	215	6.75*	13
28	Innotech Solar	ITS270Fyz1	Polycrystalline	250	6.66*	11
29	Innotech Solar	ITS270Eyz1	Polycrystalline	250	6.66*	11
30	Innotech Solar	ITS270Myz2	Monocrystalline	260	6.64*	10
31	Innotech Solar	ITS270Nyz2	Monocrystalline	260	6.64*	10
32	Innotech Solar	ITS220Eyz2	Polycrystalline	210	6.61*	9
33	Innotech Solar	ITS220Fyz2	Polycrystalline	210	6.61*	9
34	Innotech Solar	ITS210XXXX	Polycrystalline	210	6.61*	9
35	Innotech Solar	ITS220Nyz2	Monocrystalline	210	6.58*	9
36	Innotech Solar	ITS220Myz2	Monocrystalline	210	6.58*	9
37	Innotech Solar	ITS270Myz1	Monocrystalline	250	6.39*	6
38	Innotech Solar	ITS270Nyz1	Monocrystalline	250	6.39*	6

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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.