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 Zebra Energy

Here are the PSI Ratings for modules from Zebra 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
1Zebra EnergyZBR-310MMonocrystalline3108.24*85
2Zebra EnergyZBR-305MMonocrystalline3058.12*80
3Zebra EnergyZBR-255MMonocrystalline2558.06*78
4Zebra EnergyZBR-200M5Monocrystalline2007.99*75
5Zebra EnergyZBR-300PPolycrystalline3007.99*75
6Zebra EnergyZBR-300MMonocrystalline3007.98*74
7Zebra EnergyZBR-250MAMonocrystalline2507.90*70
8Zebra EnergyZBR-295PPolycrystalline2957.85*68
9Zebra EnergyZBR-295MMonocrystalline2957.84*68
10Zebra EnergyZBR-195M5Monocrystalline1957.80*66
11Zebra EnergyZBR-245MAMonocrystalline2457.74*62
12Zebra EnergyZBR-290MMonocrystalline2907.72*61
13Zebra EnergyZBR-290PPolycrystalline2907.72*61
14Zebra EnergyZBR-190M5Monocrystalline1907.64*56
15Zebra EnergyZBR-280PPolycrystalline2807.61*55
16Zebra EnergyZBR-285PPolycrystalline2857.58*53
17Zebra EnergyZBR-240MAMonocrystalline2407.58*53
18Zebra EnergyZBR-240PAPolycrystalline2407.54*50
19Zebra EnergyZBR-230PPolycrystalline2307.44*44
20Zebra EnergyZBR-185M5Monocrystalline1857.43*44
21Zebra EnergyZBR-270PPolycrystalline2707.40*41
22Zebra EnergyZBR-235PPolycrystalline2357.38*40
23Zebra EnergyZBR-260PPolycrystalline2606.83*15
24Zebra EnergyZBR-220PPolycrystalline2206.81*14
25Zebra EnergyZBR-250PPolycrystalline2506.62*10
26Zebra EnergyZBR-210PPolycrystalline2106.50*8
27Zebra EnergyZBR-200PPolycrystalline2006.19*4

* 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.