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
1	Zhejiang Sunflower Light Energy Science & Technology	SF125x125-72-M-185W	Monocrystalline	185	7.29*	35
2	Zhejiang Sunflower Light Energy Science & Technology	SF156x156-60-M-240W	Monocrystalline	240	7.11*	26
3	Zhejiang Sunflower Light Energy Science & Technology	SF125x125-72-M-180W	Monocrystalline	180	7.07*	24
4	Zhejiang Sunflower Light Energy Science & Technology	SF156x156-60-M-235W	Monocrystalline	235	7.01*	22
5	Zhejiang Sunflower Light Energy Science & Technology	SF156x156-60-P-230W	Polycrystalline	230	6.95*	19
6	Zhejiang Sunflower Light Energy Science & Technology	SF156x156-60-M-230W	Monocrystalline	230	6.89*	17
7	Zhejiang Sunflower Light Energy Science & Technology	SF125x125-72-M-175W	Monocrystalline	175	6.87*	17
8	Zhejiang Sunflower Light Energy Science & Technology	SF156x156-60-P-225W	Polycrystalline	225	6.80*	14
9	Zhejiang Sunflower Light Energy Science & Technology	SF156x156-60-M-225W	Monocrystalline	225	6.74*	13
10	Zhejiang Sunflower Light Energy Science & Technology	SF125x125-72-M-170W	Monocrystalline	170	6.71*	12
11	Zhejiang Sunflower Light Energy Science & Technology	SF156x156-60-P-220W	Polycrystalline	220	6.65*	10
12	Zhejiang Sunflower Light Energy Science & Technology	SF156x156-60-M-220W	Monocrystalline	220	6.59*	9
13	Zhejiang Sunflower Light Energy Science & Technology	SF125x125-72-M-165W	Monocrystalline	165	6.53*	8
14	Zhejiang Sunflower Light Energy Science & Technology	SF156x156-60-M-215W	Monocrystalline	215	6.48*	7
15	Zhejiang Sunflower Light Energy Science & Technology	SF156x156-60-P-215W	Polycrystalline	215	6.48*	7
16	Zhejiang Sunflower Light Energy Science & Technology	SF156x156-60-M-210W	Monocrystalline	210	6.34*	5
17	Zhejiang Sunflower Light Energy Science & Technology	SF156x156-60-P-210W	Polycrystalline	210	6.34*	5
18	Zhejiang Sunflower Light Energy Science & Technology	SF125x125-72-M-160W	Monocrystalline	160	6.23*	4
19	Zhejiang Sunflower Light Energy Science & Technology	SF156x156-60-P-205W	Polycrystalline	205	6.18*	4
20	Zhejiang Sunflower Light Energy Science & Technology	SF156x156-60-M-205W	Monocrystalline	205	6.18*	4
21	Zhejiang Sunflower Light Energy Science & Technology	SF125x125-72-M-155W	Monocrystalline	155	6.04*	3
22	Zhejiang Sunflower Light Energy Science & Technology	SF156x156-60-P-200W	Polycrystalline	200	6.04*	3
23	Zhejiang Sunflower Light Energy Science & Technology	SF156x156-60-M-200W	Monocrystalline	200	6.04*	3
24	Zhejiang Sunflower Light Energy Science & Technology	SF125x125-72-M-150W	Monocrystalline	150	5.87*	3

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* 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.