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 CertainTeed

Here are the PSI Ratings for modules from CertainTeed, 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	CertainTeed	CT285M10-01	Monocrystalline	285	9.12*	97
2	CertainTeed	CT260P00-01	Polycrystalline	260	8.32*	87
3	CertainTeed	CT260P10-01	Polycrystalline	260	8.32*	87
4	CertainTeed	CT270M11-01	Monocrystalline	270	8.30*	86
5	CertainTeed	CT265M11-01	Monocrystalline	265	8.15*	81
6	CertainTeed	Apollo II-57	Monocrystalline	57	6.29*	5
7	CertainTeed	Apollo II-56	Monocrystalline	56	6.18*	4
8	CertainTeed	Apollo II-55	Monocrystalline	55	6.07*	3
9	CertainTeed	Apollo II-54	Monocrystalline	54	6.00*	3
10	CertainTeed	Apollo II-63	Monocrystalline	63	5.83*	3
11	CertainTeed	Apollo Tile II-63	Monocrystalline	63	5.82*	3
12	CertainTeed	Apollo II-62	Monocrystalline	62	5.73*	2
13	CertainTeed	Apollo Tile II-62	Monocrystalline	62	5.72*	2
14	CertainTeed	Apollo II-61	Monocrystalline	61	5.65*	2
15	CertainTeed	Apollo Tile II-61	Monocrystalline	61	5.64*	2
16	CertainTeed	Apollo II-60	Monocrystalline	60	5.53*	2
17	CertainTeed	Apollo Tile II-60	Monocrystalline	60	5.52*	2
18	CertainTeed	Apollo II-59	Monocrystalline	59	5.46*	2
19	CertainTeed	Apollo Tile II-59	Monocrystalline	59	5.45*	2
20	CertainTeed	Apollo Tile II-58	Monocrystalline	58	5.36*	2
21	CertainTeed	Apollo II-58	Monocrystalline	58	5.36*	2
22	CertainTeed	Apollo Tile II-57	Monocrystalline	57	5.02*	2
23	CertainTeed	Apollo Tile II-56	Monocrystalline	56	4.93*	1
24	CertainTeed	Apollo Tile II-55	Monocrystalline	55	4.85*	1
25	CertainTeed	Apollo Tile II-54	Monocrystalline	54	4.79*	1
26	CertainTeed	APOLLO TILE-B	Polycrystalline	52	4.63*	1
27	CertainTeed	APOLLO TILE-G	Polycrystalline	52	4.63*	1
28	CertainTeed	Apollo	Polycrystalline	52	4.59*	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.