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 Tata Power Solar Systems

Here are the PSI Ratings for modules from Tata Power Solar Systems, 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
1Tata Power Solar SystemsTP310LBZPolycrystalline3107.97*74
2Tata Power Solar SystemsTP305LBZPolycrystalline3057.86*69
3Tata Power Solar SystemsTP300LBZPolycrystalline3007.73*61
4Tata Power Solar SystemsTP255MBZPolycrystalline2557.67*58
5Tata Power Solar SystemsTP295LBZPolycrystalline2957.60*54
6Tata Power Solar SystemsTP250MBZPolycrystalline2507.52*49
7Tata Power Solar SystemsTP150SBZPolycrystalline1507.49*48
8Tata Power Solar SystemsTP290LBZPolycrystalline2907.47*46
9Tata Power Solar SystemsTP245MBZPolycrystalline2457.37*39
10Tata Power Solar SystemsTP285LBZPolycrystalline2857.34*38
11Tata Power Solar SystemsTP145SBZPolycrystalline1457.25*33
12Tata Power Solar SystemsTP240MBZPolycrystalline2407.23*32
13Tata Power Solar SystemsTP280LBZPolycrystalline2807.20*31
14Tata Power Solar SystemsTP235MBZPolycrystalline2357.09*25
15Tata Power Solar SystemsTP140SBZPolycrystalline1406.99*21
16Tata Power Solar SystemsTP275LBZPolycrystalline2756.94*18
17Tata Power Solar SystemsTP270LBZPolycrystalline2706.81*14
18Tata Power Solar SystemsTP265LBZPolycrystalline2656.68*11

* 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.