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 Perlight Solar

Here are the PSI Ratings for modules from Perlight 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	Perlight Solar	PLM-290P-72	Polycrystalline	290	7.53*	50
2	Perlight Solar	PLM-305M-72	Monocrystalline	305	7.48*	46
3	Perlight Solar	PLM-240P-60	Polycrystalline	240	7.46*	46
4	Perlight Solar	PLM-300M-72	Monocrystalline	300	7.46*	46
5	Perlight Solar	PLM-250M-60	Monocrystalline	250	7.43*	43
6	Perlight Solar	PLM-295M-72	Monocrystalline	295	7.43*	43
7	Perlight Solar	PLM-290M-72	Monocrystalline	290	7.43*	43
8	Perlight Solar	PLM-245M-60	Monocrystalline	245	7.43*	44
9	Perlight Solar	PLM-285P-72	Polycrystalline	285	7.40*	42
10	Perlight Solar	PLM-280P-72	Polycrystalline	280	7.37*	40
11	Perlight Solar	PLM-235P-60	Polycrystalline	235	7.35*	38
12	Perlight Solar	PLM-255M-60	Monocrystalline	255	7.35*	39
13	Perlight Solar	PLM-270P-72	Polycrystalline	270	7.28*	35
14	Perlight Solar	PLM-185M-72	Monocrystalline	185	7.26*	34
15	Perlight Solar	PLM-275P-72	Polycrystalline	275	7.23*	32
16	Perlight Solar	PLM-230P-60	Polycrystalline	230	7.23*	32
17	Perlight Solar	PLM-240M-60	Monocrystalline	240	7.16*	28
18	Perlight Solar	PLM-225P-60	Polycrystalline	225	6.93*	18
19	Perlight Solar	PLM-220P-60	Polycrystalline	220	6.70*	12
20	Perlight Solar	PLM-175M-72	Monocrystalline	175	6.69*	11
21	Perlight Solar	PLM-215P-60	Polycrystalline	215	6.53*	8
22	Perlight Solar	PLM-210P-60	Polycrystalline	210	6.38*	6
23	Perlight Solar	PLM-205P-60	Polycrystalline	205	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.