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 Hunan Sunzone Optoelectronics Energy

Here are the PSI Ratings for modules from Hunan Sunzone Optoelectronics Energy, 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	Hunan Sunzone Optoelectronics Energy	SZ190M-36	Monocrystalline	190	7.78*	64
2	Hunan Sunzone Optoelectronics Energy	SZ290P-35	Polycrystalline	290	7.70*	60
3	Hunan Sunzone Optoelectronics Energy	SZ240P-29	Polycrystalline	240	7.63*	56
4	Hunan Sunzone Optoelectronics Energy	SZ185M-36	Monocrystalline	185	7.58*	52
5	Hunan Sunzone Optoelectronics Energy	SZ285P-35	Polycrystalline	285	7.58*	53
6	Hunan Sunzone Optoelectronics Energy	SZ235P-29	Polycrystalline	235	7.48*	47
7	Hunan Sunzone Optoelectronics Energy	SZ280P-35	Polycrystalline	280	7.44*	44
8	Hunan Sunzone Optoelectronics Energy	SZ180M-36	Monocrystalline	180	7.35*	38
9	Hunan Sunzone Optoelectronics Energy	SZ275P-35	Polycrystalline	275	7.31*	36
10	Hunan Sunzone Optoelectronics Energy	SZ230P-29	Polycrystalline	230	7.31*	36
11	Hunan Sunzone Optoelectronics Energy	SZ225P-29	Polycrystalline	225	7.16*	28
12	Hunan Sunzone Optoelectronics Energy	SZ220P-29	Polycrystalline	220	7.00*	21

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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.