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 Foxconn International

Here are the PSI Ratings for modules from Foxconn International, 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	Foxconn International	FSM250-D2C0	Polycrystalline	250	7.76*	63
2	Foxconn International	FSM225-D3C0	Polycrystalline	225	7.73*	62
3	Foxconn International	FSM295-D1E0	Polycrystalline	295	7.66*	57
4	Foxconn International	FSM245-D2C0	Polycrystalline	245	7.60*	54
5	Foxconn International	FSM295-D1F0	Polycrystalline	295	7.59*	53
6	Foxconn International	FSM220-D3C0	Polycrystalline	220	7.56*	51
7	Foxconn International	FSM290-D1E0	Polycrystalline	290	7.53*	50
8	Foxconn International	FSM195-D4C0	Polycrystalline	195	7.49*	47
9	Foxconn International	FSM290-D1F0	Polycrystalline	290	7.47*	46
10	Foxconn International	FSM240-D2C0	Polycrystalline	240	7.45*	45
11	Foxconn International	FSM285-D1E0	Polycrystalline	285	7.40*	42
12	Foxconn International	FSM215-D3C0	Polycrystalline	215	7.38*	40
13	Foxconn International	FSM285-D1F0	Polycrystalline	285	7.34*	38
14	Foxconn International	FSM190-D4C0	Polycrystalline	190	7.31*	36
15	Foxconn International	FSM235-D2C0	Polycrystalline	235	7.29*	35
16	Foxconn International	FSM280-D1E0	Polycrystalline	280	7.27*	34
17	Foxconn International	FSM280-D1F0	Polycrystalline	280	7.21*	31
18	Foxconn International	FSM210-D3C0	Polycrystalline	210	7.21*	31
19	Foxconn International	FSM275-D1E0	Polycrystalline	275	7.14*	27
20	Foxconn International	FSM230-D2C0	Polycrystalline	230	7.13*	27
21	Foxconn International	FSM185-D4C0	Polycrystalline	185	7.11*	26
22	Foxconn International	FSM275-D1F0	Polycrystalline	275	7.08*	25
23	Foxconn International	FSM205-D3C0	Polycrystalline	205	7.04*	23

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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.