Principal Solar Institute

A community for development and installation professionals in the solar industry

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
1Centrosolar CanadaSP6 255SWPolycrystalline2557.67*58
2Centrosolar CanadaSP6 250SWPolycrystalline2507.53*50
3Centrosolar CanadaSP6 245SWPolycrystalline2457.38*40
4Centrosolar CanadaSP6 240SWPolycrystalline2407.23*32
5Centrosolar CanadaSP7 285SWPolycrystalline2857.15*28
6Centrosolar CanadaSP6 235SWPolycrystalline2357.08*24
7Centrosolar CanadaSP7 280SWPolycrystalline2807.04*23
8Centrosolar CanadaSP6 230SWPolycrystalline2306.92*18
9Centrosolar CanadaSP7 275SWPolycrystalline2756.91*18
10Centrosolar CanadaSP7 270SWPolycrystalline2706.78*14
11Centrosolar CanadaSP6 225SWPolycrystalline2256.77*13
12Centrosolar CanadaSP7 265SWPolycrystalline2656.65*10
13Centrosolar CanadaSP6 220SWPolycrystalline2206.64*10

* 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.