Principal Solar Institute

A community for development and installation professionals in the solar industry

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 Changzhou Nesl Solartech

Here are the PSI Ratings for modules from Changzhou Nesl Solartech, 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
1Changzhou Nesl SolartechDJ-310D/CMonocrystalline3108.24*85
2Changzhou Nesl SolartechDJ-305D/CMonocrystalline3058.12*80
3Changzhou Nesl SolartechDJ-255D/CMonocrystalline2558.06*78
4Changzhou Nesl SolartechDJ-255D/C-ST15Monocrystalline2558.06*78
5Changzhou Nesl SolartechDJ-300PPolycrystalline3007.99*75
6Changzhou Nesl SolartechDJ-200DMonocrystalline2007.99*75
7Changzhou Nesl SolartechDJ-300D/CMonocrystalline3007.98*74
8Changzhou Nesl SolartechDJ-250DA/C-ST15Monocrystalline2507.90*70
9Changzhou Nesl SolartechDJ-250DA/CMonocrystalline2507.90*71
10Changzhou Nesl SolartechDJ-295PPolycrystalline2957.85*68
11Changzhou Nesl SolartechDJ-295D/CMonocrystalline2957.84*68
12Changzhou Nesl SolartechDJ-195DMonocrystalline1957.80*66
13Changzhou Nesl SolartechDJ-245DA/C-ST15Monocrystalline2457.74*62
14Changzhou Nesl SolartechDJ-245DA/CMonocrystalline2457.74*62
15Changzhou Nesl SolartechDJ-290D/CMonocrystalline2907.72*61
16Changzhou Nesl SolartechDJ-290PPolycrystalline2907.72*61
17Changzhou Nesl SolartechDJ-190DMonocrystalline1907.64*56
18Changzhou Nesl SolartechDJ-280PPolycrystalline2807.61*55
19Changzhou Nesl SolartechDJ-240DA/C-ST15Monocrystalline2407.58*53
20Changzhou Nesl SolartechDJ-285PPolycrystalline2857.58*53
21Changzhou Nesl SolartechDJ-240DA/CMonocrystalline2407.58*53
22Changzhou Nesl SolartechDJ-240PAPolycrystalline2407.54*50
23Changzhou Nesl SolartechDJ-230P-ST15Polycrystalline2307.44*44
24Changzhou Nesl SolartechDJ-230PPolycrystalline2307.44*44
25Changzhou Nesl SolartechDJ-185DMonocrystalline1857.43*44
26Changzhou Nesl SolartechDJ-270PPolycrystalline2707.40*41
27Changzhou Nesl SolartechDJ-235PPolycrystalline2357.38*40
28Changzhou Nesl SolartechDJ-235P-ST15Polycrystalline2357.38*40
29Changzhou Nesl SolartechDJ-180DMonocrystalline1807.17*28
30Changzhou Nesl SolartechDJ-175DMonocrystalline1756.97*20
31Changzhou Nesl SolartechDJ-260PPolycrystalline2606.83*15
32Changzhou Nesl SolartechDJ-220PPolycrystalline2206.81*15
33Changzhou Nesl SolartechDJ-170DMonocrystalline1706.63*10
34Changzhou Nesl SolartechDJ-250PPolycrystalline2506.62*10
35Changzhou Nesl SolartechDJ-165DMonocrystalline1656.53*8
36Changzhou Nesl SolartechDJ-210PPolycrystalline2106.50*8
37Changzhou Nesl SolartechDJ-240PPolycrystalline2406.50*8
38Changzhou Nesl SolartechDJ-240P-ST15Polycrystalline2406.50*8
39Changzhou Nesl SolartechDJ-200PPolycrystalline2006.19*4

* 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.