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 Solaria

Here are the PSI Ratings for modules from Solaria, 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	Solaria	Solaria 280	Monocrystalline	280	6.92*	18
2	Solaria	Solaria 225 Frameless	Monocrystalline	225	6.87*	16
3	Solaria	Solaria 225	Monocrystalline	225	6.87*	16
4	Solaria	Solaria 260	Monocrystalline	260	6.83*	15
5	Solaria	Solaria 230	Monocrystalline	230	6.81*	14
6	Solaria	Solaria 230 Frameless	Monocrystalline	230	6.81*	14
7	Solaria	Solaria 275	Monocrystalline	275	6.78*	14
8	Solaria	Solaria 255	Monocrystalline	255	6.69*	11
9	Solaria	Solaria 270	Monocrystalline	270	6.67*	11
10	Solaria	Solaria 250	Monocrystalline	250	6.56*	9
11	Solaria	Solaria 265	Monocrystalline	265	6.55*	8
12	Solaria	Solaria 220 Frameless	Monocrystalline	220	6.53*	8
13	Solaria	Solaria 220	Monocrystalline	220	6.53*	8
14	Solaria	Solaria 245	Monocrystalline	245	6.42*	6
15	Solaria	Solaria 210 Frameless	Monocrystalline	210	6.29*	5
16	Solaria	Solaria 210	Monocrystalline	210	6.29*	5
17	Solaria	Solaria 240	Monocrystalline	240	6.29*	5

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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.