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 Zhejiang Sunflower Light Energy Science & Technology

Here are the PSI Ratings for modules from Zhejiang Sunflower Light Energy Science & Technology, 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
1Zhejiang Sunflower Light Energy Science & TechnologySF125x125-72-M-185WMonocrystalline1857.29*35
2Zhejiang Sunflower Light Energy Science & TechnologySF156x156-60-M-240WMonocrystalline2407.11*26
3Zhejiang Sunflower Light Energy Science & TechnologySF125x125-72-M-180WMonocrystalline1807.07*24
4Zhejiang Sunflower Light Energy Science & TechnologySF156x156-60-M-235WMonocrystalline2357.01*22
5Zhejiang Sunflower Light Energy Science & TechnologySF156x156-60-P-230WPolycrystalline2306.95*19
6Zhejiang Sunflower Light Energy Science & TechnologySF156x156-60-M-230WMonocrystalline2306.89*17
7Zhejiang Sunflower Light Energy Science & TechnologySF125x125-72-M-175WMonocrystalline1756.87*17
8Zhejiang Sunflower Light Energy Science & TechnologySF156x156-60-P-225WPolycrystalline2256.80*14
9Zhejiang Sunflower Light Energy Science & TechnologySF156x156-60-M-225WMonocrystalline2256.74*13
10Zhejiang Sunflower Light Energy Science & TechnologySF125x125-72-M-170WMonocrystalline1706.71*12
11Zhejiang Sunflower Light Energy Science & TechnologySF156x156-60-P-220WPolycrystalline2206.65*10
12Zhejiang Sunflower Light Energy Science & TechnologySF156x156-60-M-220WMonocrystalline2206.59*9
13Zhejiang Sunflower Light Energy Science & TechnologySF125x125-72-M-165WMonocrystalline1656.53*8
14Zhejiang Sunflower Light Energy Science & TechnologySF156x156-60-M-215WMonocrystalline2156.48*7
15Zhejiang Sunflower Light Energy Science & TechnologySF156x156-60-P-215WPolycrystalline2156.48*7
16Zhejiang Sunflower Light Energy Science & TechnologySF156x156-60-M-210WMonocrystalline2106.34*5
17Zhejiang Sunflower Light Energy Science & TechnologySF156x156-60-P-210WPolycrystalline2106.34*5
18Zhejiang Sunflower Light Energy Science & TechnologySF125x125-72-M-160WMonocrystalline1606.23*4
19Zhejiang Sunflower Light Energy Science & TechnologySF156x156-60-P-205WPolycrystalline2056.18*4
20Zhejiang Sunflower Light Energy Science & TechnologySF156x156-60-M-205WMonocrystalline2056.18*4
21Zhejiang Sunflower Light Energy Science & TechnologySF125x125-72-M-155WMonocrystalline1556.04*3
22Zhejiang Sunflower Light Energy Science & TechnologySF156x156-60-P-200WPolycrystalline2006.04*3
23Zhejiang Sunflower Light Energy Science & TechnologySF156x156-60-M-200WMonocrystalline2006.04*3
24Zhejiang Sunflower Light Energy Science & TechnologySF125x125-72-M-150WMonocrystalline1505.87*3

* 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.