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 Ningbo Qixin Solar Electrical Appliance

Here are the PSI Ratings for modules from Ningbo Qixin Solar Electrical Appliance, 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
1Ningbo Qixin Solar Electrical ApplianceSL235UL-30PPolycrystalline2357.37*39
2Ningbo Qixin Solar Electrical ApplianceSL250UL-48MMonocrystalline2507.32*37
3Ningbo Qixin Solar Electrical ApplianceSL185UL-36MMonocrystalline1857.29*35
4Ningbo Qixin Solar Electrical ApplianceSL230UL-30PPolycrystalline2307.21*31
5Ningbo Qixin Solar Electrical ApplianceSL280UL-36MMonocrystalline2807.19*30
6Ningbo Qixin Solar Electrical ApplianceSL245UL-48MMonocrystalline2457.17*29
7Ningbo Qixin Solar Electrical ApplianceSL275UL-36MMonocrystalline2757.07*24
8Ningbo Qixin Solar Electrical ApplianceSL225UL-30PPolycrystalline2257.06*24
9Ningbo Qixin Solar Electrical ApplianceSL240UL-48MMonocrystalline2407.02*22
10Ningbo Qixin Solar Electrical ApplianceSL180UL-36MMonocrystalline1806.99*21
11Ningbo Qixin Solar Electrical ApplianceSL270UL-36MMonocrystalline2706.90*17
12Ningbo Qixin Solar Electrical ApplianceSL220UL-30PPolycrystalline2206.88*17
13Ningbo Qixin Solar Electrical ApplianceSL235UL-48MMonocrystalline2356.83*15
14Ningbo Qixin Solar Electrical ApplianceSL265UL-36MMonocrystalline2656.77*13
15Ningbo Qixin Solar Electrical ApplianceSL215UL-30PPolycrystalline2156.72*12
16Ningbo Qixin Solar Electrical ApplianceSL230UL-48MMonocrystalline2306.68*11
17Ningbo Qixin Solar Electrical ApplianceSL260UL-36MMonocrystalline2606.64*10
18Ningbo Qixin Solar Electrical ApplianceSL170UL-36MMonocrystalline1706.62*10
19Ningbo Qixin Solar Electrical ApplianceSL210UL-30PPolycrystalline2106.56*9
20Ningbo Qixin Solar Electrical ApplianceSL225UL-48MMonocrystalline2256.54*8
21Ningbo Qixin Solar Electrical ApplianceSL255UL-36MMonocrystalline2556.51*8
22Ningbo Qixin Solar Electrical ApplianceSL165UL-36MMonocrystalline1656.44*7
23Ningbo Qixin Solar Electrical ApplianceSL220UL-48MMonocrystalline2206.39*6
24Ningbo Qixin Solar Electrical ApplianceSL250UL-36MMonocrystalline2506.38*6
25Ningbo Qixin Solar Electrical ApplianceSL160UL-36MMonocrystalline1606.23*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.