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 ENN Solar Energy

Here are the PSI Ratings for modules from ENN Solar Energy, 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	ENN Solar Energy	EST-120	Thin Film	120	4.56*	1
2	ENN Solar Energy	EST-240V	Thin Film	240	4.53*	1
3	ENN Solar Energy	EST-240H	Thin Film	240	4.53*	1
4	ENN Solar Energy	EST-480	Thin Film	480	4.51*	1
5	ENN Solar Energy	EST-228HA	Thin Film	229	4.41*	1
6	ENN Solar Energy	EST-460A	Thin Film	458	4.39*	1
7	ENN Solar Energy	EST-460	Thin Film	458	4.39*	1
8	ENN Solar Energy	EST-115	Thin Film	115	4.36*	1
9	ENN Solar Energy	EST-230H	Thin Film	230	4.34*	1
10	ENN Solar Energy	EST-230V	Thin Film	230	4.33*	1
11	ENN Solar Energy	EST-115A	Thin Film	114	4.32*	1
12	ENN Solar Energy	EST-228VA	Thin Film	229	4.31*	1
13	ENN Solar Energy	EST-220H	Thin Film	220	4.16*	1
14	ENN Solar Energy	EST-220V	Thin Film	220	4.15*	1
15	ENN Solar Energy	EST-440	Thin Film	440	4.14*	1
16	ENN Solar Energy	EST-110	Thin Film	110	4.11*	1

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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.