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 KD Solar

Here are the PSI Ratings for modules from KD 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	KD Solar	KD-24012A2	Polycrystalline	240	7.46*	45
2	KD Solar	KD-21512A2	Polycrystalline	215	7.32*	37
3	KD Solar	KD-23512A2	Polycrystalline	235	7.32*	37
4	KD Solar	KD-21513A2	Polycrystalline	215	7.31*	37
5	KD Solar	KD-21012A2	Polycrystalline	210	7.15*	27
6	KD Solar	KD-23012A2	Polycrystalline	230	7.12*	26
7	KD Solar	KD-21013A2	Polycrystalline	210	7.08*	25
8	KD Solar	KD-23013A2	Polycrystalline	230	7.04*	23
9	KD Solar	KD-22512A2	Polycrystalline	225	6.98*	20
10	KD Solar	KD-20512A2	Polycrystalline	205	6.98*	20
11	KD Solar	KD-20513A2	Polycrystalline	205	6.91*	18
12	KD Solar	KD-22513A2	Polycrystalline	225	6.84*	16
13	KD Solar	KD-22012A2	Polycrystalline	220	6.82*	15
14	KD Solar	KD-20012A2	Polycrystalline	200	6.82*	15
15	KD Solar	KD-20013A2	Polycrystalline	200	6.74*	12
16	KD Solar	KD-22013A2	Polycrystalline	220	6.69*	11

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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.