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 Sova Power

Here are the PSI Ratings for modules from Sova Power, 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	Sova Power	SOLARSOVA 220P	Polycrystalline	220	6.86*	16
2	Sova Power	SOLARSOVA 215P	Polycrystalline	215	6.72*	12
3	Sova Power	SOLARSOVA 260P	Polycrystalline	260	6.71*	12
4	Sova Power	SOLARSOVA 210P	Polycrystalline	210	6.60*	9
5	Sova Power	SOLARSOVA 255P	Polycrystalline	255	6.54*	8
6	Sova Power	SOLARSOVA 205P	Polycrystalline	205	6.39*	6
7	Sova Power	SOLARSOVA 250P	Polycrystalline	250	6.38*	6
8	Sova Power	SOLARSOVA 245P	Polycrystalline	245	6.28*	5
9	Sova Power	SOLARSOVA 200P	Polycrystalline	200	6.22*	4
10	Sova Power	SOLARSOVA 240P	Polycrystalline	240	6.17*	4
11	Sova Power	SOLARSOVA 235P	Polycrystalline	235	5.99*	3

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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.