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 Shanghai Si-Solar Technologies

Here are the PSI Ratings for modules from Shanghai Si-Solar Technologies, 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
1Shanghai Si-Solar TechnologiesSTPV190Monocrystalline1907.52*49
2Shanghai Si-Solar TechnologiesSTPV285Polycrystalline2857.44*44
3Shanghai Si-Solar TechnologiesSTPV240Polycrystalline2407.42*42
4Shanghai Si-Solar TechnologiesSTPV185Monocrystalline1857.34*38
5Shanghai Si-Solar TechnologiesSTPV280Polycrystalline2807.30*36
6Shanghai Si-Solar TechnologiesSTPV235Polycrystalline2357.27*34
7Shanghai Si-Solar TechnologiesSTPV275Polycrystalline2757.18*29
8Shanghai Si-Solar TechnologiesSTPV180Monocrystalline1807.12*26
9Shanghai Si-Solar TechnologiesSTPV230Polycrystalline2307.11*26
10Shanghai Si-Solar TechnologiesSTPV270Polycrystalline2707.05*23
11Shanghai Si-Solar TechnologiesSTPV225Polycrystalline2256.96*20
12Shanghai Si-Solar TechnologiesSTPV265Polycrystalline2656.91*18
13Shanghai Si-Solar TechnologiesSTPV220Polycrystalline2206.81*14

* 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.