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 Centrosolar Canada

Here are the PSI Ratings for modules from Centrosolar Canada, 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	Centrosolar Canada	SP6 255SW	Polycrystalline	255	7.67*	58
2	Centrosolar Canada	SP6 250SW	Polycrystalline	250	7.53*	50
3	Centrosolar Canada	SP6 245SW	Polycrystalline	245	7.38*	40
4	Centrosolar Canada	SP6 240SW	Polycrystalline	240	7.23*	32
5	Centrosolar Canada	SP7 285SW	Polycrystalline	285	7.15*	28
6	Centrosolar Canada	SP6 235SW	Polycrystalline	235	7.08*	24
7	Centrosolar Canada	SP7 280SW	Polycrystalline	280	7.04*	23
8	Centrosolar Canada	SP6 230SW	Polycrystalline	230	6.92*	18
9	Centrosolar Canada	SP7 275SW	Polycrystalline	275	6.91*	18
10	Centrosolar Canada	SP7 270SW	Polycrystalline	270	6.78*	14
11	Centrosolar Canada	SP6 225SW	Polycrystalline	225	6.77*	13
12	Centrosolar Canada	SP7 265SW	Polycrystalline	265	6.65*	10
13	Centrosolar Canada	SP6 220SW	Polycrystalline	220	6.64*	10

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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.