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.

Subscribe to our email list

Before using the PSI Ratings, you should subscribe to our email list to receive important updates from the Principal Solar Institute.

PSI Ratings – PV Solar Modules from Conergy Holding

Here are the PSI Ratings for modules from Conergy Holding, 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
1Conergy HoldingCONERGY ON 255-60Polycrystalline2557.67*58
2Conergy HoldingCONERGY ON 250-60Polycrystalline2507.53*50
3Conergy HoldingCONERGY ON 245-60Polycrystalline2457.38*40
4Conergy HoldingCONERGY ON 240-60Polycrystalline2407.23*32
5Conergy HoldingCONERGY ON 285P-72Polycrystalline2857.15*28
6Conergy HoldingCONERGY ON 235-60Polycrystalline2357.08*24
7Conergy HoldingCONERGY ON 280P-72Polycrystalline2807.04*23
8Conergy HoldingCONERGY ON 230-60Polycrystalline2306.92*18
9Conergy HoldingCONERGY ON 275P-72Polycrystalline2756.91*18
10Conergy HoldingCONERGY ON 270P-72Polycrystalline2706.78*14
11Conergy HoldingCONERGY ON 225-60Polycrystalline2256.77*13
12Conergy HoldingCONERGY ON 265P-72Polycrystalline2656.65*10
13Conergy HoldingCONERGY ON 220-60Polycrystalline2206.64*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.