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 Philadelphia Solar

Here are the PSI Ratings for modules from Philadelphia 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	Philadelphia Solar	PS-P60-250	Polycrystalline	250	7.72*	61
2	Philadelphia Solar	PS-P54-225	Polycrystalline	225	7.70*	60
3	Philadelphia Solar	PS-P60-245	Polycrystalline	245	7.56*	51
4	Philadelphia Solar	PS-P72-290	Polycrystalline	290	7.54*	50
5	Philadelphia Solar	PS-P54-220	Polycrystalline	220	7.51*	49
6	Philadelphia Solar	PS-M72S-190	Monocrystalline	190	7.42*	43
7	Philadelphia Solar	PS-P72-285	Polycrystalline	285	7.42*	43
8	Philadelphia Solar	PS-P60-240	Polycrystalline	240	7.39*	41
9	Philadelphia Solar	PS-P54-215	Polycrystalline	215	7.34*	38
10	Philadelphia Solar	PS-P36-145	Polycrystalline	145	7.33*	37
11	Philadelphia Solar	PS-P72-280	Polycrystalline	280	7.28*	35
12	Philadelphia Solar	PS-P60-235	Polycrystalline	235	7.25*	33
13	Philadelphia Solar	PS-M72S-185	Monocrystalline	185	7.22*	31
14	Philadelphia Solar	PS-M36S-95	Monocrystalline	95	7.20*	31
15	Philadelphia Solar	PS-P54-210	Polycrystalline	210	7.17*	29
16	Philadelphia Solar	PS-P72-275	Polycrystalline	275	7.16*	28
17	Philadelphia Solar	PS-P36-140	Polycrystalline	140	7.10*	25
18	Philadelphia Solar	PS-P60-230	Polycrystalline	230	7.09*	25
19	Philadelphia Solar	PS-M72S-180	Monocrystalline	180	7.03*	22
20	Philadelphia Solar	PS-P72-270	Polycrystalline	270	7.03*	22
21	Philadelphia Solar	PS-P54-205	Polycrystalline	205	7.00*	22
22	Philadelphia Solar	PS-M36S-90	Monocrystalline	90	6.91*	18
23	Philadelphia Solar	PS-P36-135	Polycrystalline	135	6.83*	15
24	Philadelphia Solar	PS-P60-220	Polycrystalline	220	6.78*	14
25	Philadelphia Solar	PS-P36-130	Polycrystalline	130	6.58*	9

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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.