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 Vikram Solar

Here are the PSI Ratings for modules from Vikram Solar, 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	Vikram Solar	Eldora VSP.72.325.03	Polycrystalline	325	8.64*	93
2	Vikram Solar	Eldora VSP.60.270.03	Polycrystalline	270	8.56*	92
3	Vikram Solar	Eldora VSP.72.320.03	Polycrystalline	320	8.50*	91
4	Vikram Solar	Eldora VSP.60.265.03	Polycrystalline	265	8.40*	89
5	Vikram Solar	Eldora VSP.72.315.03	Polycrystalline	315	8.37*	88
6	Vikram Solar	Eldora VSPB.60.265.03	Polycrystalline	265	8.32*	87
7	Vikram Solar	Eldora VSP.72.310.03	Polycrystalline	310	8.24*	84
8	Vikram Solar	Eldora VSP.60.260.03	Polycrystalline	260	8.24*	84
9	Vikram Solar	Eldora VSPB.60.260.03	Polycrystalline	260	8.17*	82
10	Vikram Solar	Eldora VSP.72.305.03	Polycrystalline	305	8.12*	80
11	Vikram Solar	Eldora VSP.60.255.03	Polycrystalline	255	8.09*	79
12	Vikram Solar	Eldora VSPB.60.255.03	Polycrystalline	255	8.01*	76
13	Vikram Solar	Eldora VSP.72.300.03	Polycrystalline	300	7.97*	74
14	Vikram Solar	Eldora VSP.60.250.03	Polycrystalline	250	7.94*	72
15	Vikram Solar	Eldora VSPB.60.250.03	Polycrystalline	250	7.86*	69
16	Vikram Solar	Eldora VSP.72.295.03	Polycrystalline	295	7.84*	67
17	Vikram Solar	Eldora VSP.60.245.03	Polycrystalline	245	7.79*	64
18	Vikram Solar	Eldora VSPB.60.245.03	Polycrystalline	245	7.71*	61
19	Vikram Solar	Eldora VSP.60.240.03	Polycrystalline	240	7.69*	59
20	Vikram Solar	ELDORA 270	Polycrystalline	270	7.04*	23

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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.