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 Tata Power Solar Systems

Here are the PSI Ratings for modules from Tata Power Solar Systems, 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	Tata Power Solar Systems	TP310LBZ	Polycrystalline	310	7.97*	74
2	Tata Power Solar Systems	TP305LBZ	Polycrystalline	305	7.86*	69
3	Tata Power Solar Systems	TP300LBZ	Polycrystalline	300	7.73*	61
4	Tata Power Solar Systems	TP255MBZ	Polycrystalline	255	7.67*	58
5	Tata Power Solar Systems	TP295LBZ	Polycrystalline	295	7.60*	54
6	Tata Power Solar Systems	TP250MBZ	Polycrystalline	250	7.52*	49
7	Tata Power Solar Systems	TP150SBZ	Polycrystalline	150	7.49*	48
8	Tata Power Solar Systems	TP290LBZ	Polycrystalline	290	7.47*	46
9	Tata Power Solar Systems	TP245MBZ	Polycrystalline	245	7.37*	39
10	Tata Power Solar Systems	TP285LBZ	Polycrystalline	285	7.34*	38
11	Tata Power Solar Systems	TP145SBZ	Polycrystalline	145	7.25*	33
12	Tata Power Solar Systems	TP240MBZ	Polycrystalline	240	7.23*	32
13	Tata Power Solar Systems	TP280LBZ	Polycrystalline	280	7.20*	31
14	Tata Power Solar Systems	TP235MBZ	Polycrystalline	235	7.09*	25
15	Tata Power Solar Systems	TP140SBZ	Polycrystalline	140	6.99*	21
16	Tata Power Solar Systems	TP275LBZ	Polycrystalline	275	6.94*	18
17	Tata Power Solar Systems	TP270LBZ	Polycrystalline	270	6.81*	14
18	Tata Power Solar Systems	TP265LBZ	Polycrystalline	265	6.68*	11

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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.