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 Zebra Energy

Here are the PSI Ratings for modules from Zebra 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	Zebra Energy	ZBR-310M	Monocrystalline	310	8.24*	85
2	Zebra Energy	ZBR-305M	Monocrystalline	305	8.12*	80
3	Zebra Energy	ZBR-255M	Monocrystalline	255	8.06*	78
4	Zebra Energy	ZBR-200M5	Monocrystalline	200	7.99*	75
5	Zebra Energy	ZBR-300P	Polycrystalline	300	7.99*	75
6	Zebra Energy	ZBR-300M	Monocrystalline	300	7.98*	74
7	Zebra Energy	ZBR-250MA	Monocrystalline	250	7.90*	70
8	Zebra Energy	ZBR-295P	Polycrystalline	295	7.85*	68
9	Zebra Energy	ZBR-295M	Monocrystalline	295	7.84*	68
10	Zebra Energy	ZBR-195M5	Monocrystalline	195	7.80*	66
11	Zebra Energy	ZBR-245MA	Monocrystalline	245	7.74*	62
12	Zebra Energy	ZBR-290M	Monocrystalline	290	7.72*	61
13	Zebra Energy	ZBR-290P	Polycrystalline	290	7.72*	61
14	Zebra Energy	ZBR-190M5	Monocrystalline	190	7.64*	56
15	Zebra Energy	ZBR-280P	Polycrystalline	280	7.61*	55
16	Zebra Energy	ZBR-285P	Polycrystalline	285	7.58*	53
17	Zebra Energy	ZBR-240MA	Monocrystalline	240	7.58*	53
18	Zebra Energy	ZBR-240PA	Polycrystalline	240	7.54*	50
19	Zebra Energy	ZBR-230P	Polycrystalline	230	7.44*	44
20	Zebra Energy	ZBR-185M5	Monocrystalline	185	7.43*	44
21	Zebra Energy	ZBR-270P	Polycrystalline	270	7.40*	41
22	Zebra Energy	ZBR-235P	Polycrystalline	235	7.38*	40
23	Zebra Energy	ZBR-260P	Polycrystalline	260	6.83*	15
24	Zebra Energy	ZBR-220P	Polycrystalline	220	6.81*	14
25	Zebra Energy	ZBR-250P	Polycrystalline	250	6.62*	10
26	Zebra Energy	ZBR-210P	Polycrystalline	210	6.50*	8
27	Zebra Energy	ZBR-200P	Polycrystalline	200	6.19*	4

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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.