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 Tianwei New Energy (Chengdu) PV Module

Here are the PSI Ratings for modules from Tianwei New Energy (Chengdu) PV Module, 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	Tianwei New Energy (Chengdu) PV Module	TW185(35)D	Monocrystalline	185	7.25*	33
2	Tianwei New Energy (Chengdu) PV Module	TW235(28)P	Polycrystalline	235	7.14*	27
3	Tianwei New Energy (Chengdu) PV Module	TW180(35)D	Monocrystalline	180	7.05*	23
4	Tianwei New Energy (Chengdu) PV Module	TW230(28)P	Polycrystalline	230	6.99*	21
5	Tianwei New Energy (Chengdu) PV Module	TW225(28)P	Polycrystalline	225	6.83*	15
6	Tianwei New Energy (Chengdu) PV Module	TW175(35)D	Monocrystalline	175	6.82*	15
7	Tianwei New Energy (Chengdu) PV Module	TW220(28)P	Polycrystalline	220	6.69*	11
8	Tianwei New Energy (Chengdu) PV Module	TW170(35)D	Monocrystalline	170	6.62*	10
9	Tianwei New Energy (Chengdu) PV Module	TW215(28)P	Polycrystalline	215	6.54*	8
10	Tianwei New Energy (Chengdu) PV Module	TW210(28)P	Polycrystalline	210	6.44*	7
11	Tianwei New Energy (Chengdu) PV Module	TW165(35)D	Monocrystalline	165	6.42*	6
12	Tianwei New Energy (Chengdu) PV Module	TW205(28)P	Polycrystalline	205	6.29*	5
13	Tianwei New Energy (Chengdu) PV Module	TW160(35)D	Monocrystalline	160	6.23*	4
14	Tianwei New Energy (Chengdu) PV Module	TW200(28)P	Polycrystalline	200	6.12*	4
15	Tianwei New Energy (Chengdu) PV Module	TW155(35)D	Monocrystalline	155	6.03*	3
16	Tianwei New Energy (Chengdu) PV Module	TW195(28)P	Polycrystalline	195	5.97*	3
17	Tianwei New Energy (Chengdu) PV Module	TW190(28)P	Polycrystalline	190	5.83*	3
18	Tianwei New Energy (Chengdu) PV Module	TW185(28)P	Polycrystalline	185	5.61*	2
19	Tianwei New Energy (Chengdu) PV Module	TW180(28)P	Polycrystalline	180	5.47*	2

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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.