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 Gloria Solar

Here are the PSI Ratings for modules from Gloria Solar, 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	Gloria Solar	GSM6-240D-E1	Polycrystalline	240	7.40*	41
2	Gloria Solar	GSM6-235D-E1	Polycrystalline	235	7.26*	34
3	Gloria Solar	GSM6-230D-E1	Polycrystalline	230	7.09*	25
4	Gloria Solar	GSS5-180A-E1	Monocrystalline	180	7.01*	22
5	Gloria Solar	GSM6-225D-E1	Polycrystalline	225	6.96*	19
6	Gloria Solar	GSS5-175A-E1	Monocrystalline	175	6.82*	15
7	Gloria Solar	GSS5-170A-E1	Monocrystalline	170	6.69*	11
8	Gloria Solar	GSM6-220D-E1	Polycrystalline	220	6.59*	9
9	Gloria Solar	GSS5-165A-E1	Monocrystalline	165	6.47*	7
10	Gloria Solar	GSM6-215D-E1	Polycrystalline	215	6.45*	7
11	Gloria Solar	GSM6-210D-E1	Polycrystalline	210	6.27*	5
12	Gloria Solar	GSS5-160A-E1	Monocrystalline	160	6.26*	5
13	Gloria Solar	GSM6-205D-E1	Polycrystalline	205	6.13*	4
14	Gloria Solar	GSM6-200D-E1	Polycrystalline	200	6.00*	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.