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 Ligitek Photovoltaic

Here are the PSI Ratings for modules from Ligitek Photovoltaic, 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	Ligitek Photovoltaic	LM285BB02	Polycrystalline	285	7.55*	51
2	Ligitek Photovoltaic	LM240BB00	Polycrystalline	240	7.51*	48
3	Ligitek Photovoltaic	LM280BB02	Polycrystalline	280	7.45*	45
4	Ligitek Photovoltaic	LM185AA00	Monocrystalline	185	7.45*	45
5	Ligitek Photovoltaic	LM235BB00	Polycrystalline	235	7.36*	39
6	Ligitek Photovoltaic	LM185BB00	Polycrystalline	185	7.34*	38
7	Ligitek Photovoltaic	LM275BB02	Polycrystalline	275	7.34*	38
8	Ligitek Photovoltaic	LM180AA00	Monocrystalline	180	7.29*	35
9	Ligitek Photovoltaic	LM270BB02	Polycrystalline	270	7.24*	32
10	Ligitek Photovoltaic	LM230BB00	Polycrystalline	230	7.20*	30
11	Ligitek Photovoltaic	LM180BB00	Polycrystalline	180	7.18*	29
12	Ligitek Photovoltaic	LM265BB02	Polycrystalline	265	7.13*	27
13	Ligitek Photovoltaic	LM175AA00	Monocrystalline	175	7.11*	26
14	Ligitek Photovoltaic	LM225BB00	Polycrystalline	225	7.04*	23
15	Ligitek Photovoltaic	LM175BB00	Polycrystalline	175	7.02*	22
16	Ligitek Photovoltaic	LM220BB00	Polycrystalline	220	6.89*	17
17	Ligitek Photovoltaic	LM215BB00	Polycrystalline	215	6.71*	12
18	Ligitek Photovoltaic	LM210BB00	Polycrystalline	210	6.56*	9
19	Ligitek Photovoltaic	LG052BB00	Polycrystalline	52	6.15*	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.