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 Solaria

Here are the PSI Ratings for modules from Solaria, 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
1SolariaSolaria 280Monocrystalline2806.92*18
2SolariaSolaria 225 FramelessMonocrystalline2256.87*16
3SolariaSolaria 225Monocrystalline2256.87*16
4SolariaSolaria 260Monocrystalline2606.83*15
5SolariaSolaria 230Monocrystalline2306.81*14
6SolariaSolaria 230 FramelessMonocrystalline2306.81*14
7SolariaSolaria 275Monocrystalline2756.78*14
8SolariaSolaria 255Monocrystalline2556.69*11
9SolariaSolaria 270Monocrystalline2706.67*11
10SolariaSolaria 250Monocrystalline2506.56*9
11SolariaSolaria 265Monocrystalline2656.55*8
12SolariaSolaria 220 FramelessMonocrystalline2206.53*8
13SolariaSolaria 220Monocrystalline2206.53*8
14SolariaSolaria 245Monocrystalline2456.42*6
15SolariaSolaria 210 FramelessMonocrystalline2106.29*5
16SolariaSolaria 210Monocrystalline2106.29*5
17SolariaSolaria 240Monocrystalline2406.29*5

* 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.