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 APOS Energy

Here are the PSI Ratings for modules from APOS Energy, 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
1APOS EnergyAS240Monocrystalline2407.48*47
2APOS EnergyAP 240MPolycrystalline2407.44*44
3APOS EnergyAP 235MPolycrystalline2357.35*39
4APOS EnergyAS190Monocrystalline1907.34*38
5APOS EnergyAS235Monocrystalline2357.33*38
6APOS EnergyAS215Monocrystalline2157.31*36
7APOS EnergyAS145Monocrystalline1457.31*36
8APOS EnergyAS230Monocrystalline2307.21*31
9APOS EnergyAS185Monocrystalline1857.21*31
10APOS EnergyAS210Monocrystalline2107.18*29
11APOS EnergyAP 230MPolycrystalline2307.15*28
12APOS EnergyAP230Polycrystalline2307.13*27
13APOS EnergyAS140Monocrystalline1407.10*26
14APOS EnergyAS225Monocrystalline2257.06*24
15APOS EnergyAS205Monocrystalline2057.05*24
16APOS EnergyAP185Polycrystalline1857.05*23
17APOS EnergyAS180Monocrystalline1807.00*21
18APOS EnergyAP205Polycrystalline2056.98*20
19APOS EnergyAP 225MPolycrystalline2256.98*21
20APOS EnergyAP140Polycrystalline1406.96*19
21APOS EnergyAP225Polycrystalline2256.94*19
22APOS EnergyAS220Monocrystalline2206.94*19
23APOS EnergyAS135Monocrystalline1356.90*17
24APOS EnergyAP180Polycrystalline1806.87*16
25APOS EnergyAS200Monocrystalline2006.85*16
26APOS EnergyAP200Polycrystalline2006.81*14
27APOS EnergyAP 220MPolycrystalline2206.81*14
28APOS EnergyAP220Polycrystalline2206.76*13
29APOS EnergyAP 215MPolycrystalline2156.69*11
30APOS EnergyAP175Polycrystalline1756.69*11
31APOS EnergyAS195Monocrystalline1956.68*11
32APOS EnergyAP135Polycrystalline1356.68*11
33APOS EnergyAP215Polycrystalline2156.67*11
34APOS EnergyAP195Polycrystalline1956.63*10
35APOS EnergyAP 210MPolycrystalline2106.53*8
36APOS EnergyAP 205MPolycrystalline2056.52*8
37APOS EnergyAP130Polycrystalline1306.52*8
38APOS EnergyAP210Polycrystalline2106.51*8
39APOS EnergyAP 200MPolycrystalline2006.50*8
40APOS EnergyAP190Polycrystalline1906.47*7

* 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.