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 Aleo Solar

Here are the PSI Ratings for modules from Aleo 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	Aleo Solar	S19H270	Monocrystalline	270	8.52*	91
2	Aleo Solar	S79U270	Monocrystalline	270	8.38*	89
3	Aleo Solar	S19H265	Monocrystalline	265	8.37*	88
4	Aleo Solar	S18U260	Polycrystalline	260	8.25*	85
5	Aleo Solar	S79U265	Monocrystalline	265	8.23*	84
6	Aleo Solar	S19H260	Monocrystalline	260	8.21*	84
7	Aleo Solar	S18U255	Polycrystalline	255	8.09*	79
8	Aleo Solar	S79U260	Monocrystalline	260	8.08*	79
9	Aleo Solar	S19H255	Monocrystalline	255	8.05*	78
10	Aleo Solar	S79U255	Monocrystalline	255	7.93*	72
11	Aleo Solar	S18U250	Polycrystalline	250	7.93*	72
12	Aleo Solar	S19H250	Monocrystalline	250	7.89*	70
13	Aleo Solar	S18U245	Polycrystalline	245	7.77*	64
14	Aleo Solar	S79U250	Monocrystalline	250	7.77*	64
15	Aleo Solar	S19U255 ulr	Monocrystalline	255	7.76*	63
16	Aleo Solar	S18U245 ulr	Polycrystalline	245	7.69*	59
17	Aleo Solar	A18U245 ulr	Polycrystalline	245	7.69*	59
18	Aleo Solar	S79.250	Monocrystalline	250	7.66*	57
19	Aleo Solar	A79.250	Monocrystalline	250	7.66*	57
20	Aleo Solar	S79U250 ulr	Monocrystalline	250	7.65*	57
21	Aleo Solar	A79U250 ulr	Monocrystalline	250	7.65*	57
22	Aleo Solar	S19U250 ulr	Monocrystalline	250	7.62*	55
23	Aleo Solar	S18U240	Polycrystalline	240	7.61*	54
24	Aleo Solar	S18.245	Polycrystalline	245	7.58*	52
25	Aleo Solar	A18.245	Polycrystalline	245	7.58*	53
26	Aleo Solar	S19U245 ulr	Monocrystalline	245	7.53*	49
27	Aleo Solar	S18U240 ulr	Polycrystalline	240	7.53*	50
28	Aleo Solar	A18U240 ulr	Polycrystalline	240	7.53*	50
29	Aleo Solar	A79.245	Monocrystalline	245	7.49*	47
30	Aleo Solar	S79.245	Monocrystalline	245	7.49*	47
31	Aleo Solar	S79U245 ulr	Monocrystalline	245	7.48*	47
32	Aleo Solar	A79U245 ulr	Monocrystalline	245	7.48*	47
33	Aleo Solar	S18.240	Polycrystalline	240	7.42*	43
34	Aleo Solar	A18.240	Polycrystalline	240	7.42*	43
35	Aleo Solar	A18U235 ulr	Polycrystalline	235	7.39*	41
36	Aleo Solar	S18U235 ulr	Polycrystalline	235	7.39*	41
37	Aleo Solar	A79U240 ulr	Monocrystalline	240	7.36*	39
38	Aleo Solar	S79U240 ulr	Monocrystalline	240	7.36*	39
39	Aleo Solar	S19U240 ulr	Monocrystalline	240	7.32*	37
40	Aleo Solar	A18.235	Polycrystalline	235	7.23*	32
41	Aleo Solar	S18.235	Polycrystalline	235	7.23*	32
42	Aleo Solar	A79.235	Monocrystalline	235	7.21*	31
43	Aleo Solar	S79.235	Monocrystalline	235	7.21*	31
44	Aleo Solar	A18U230 ulr	Polycrystalline	230	7.20*	30
45	Aleo Solar	S18U230 ulr	Polycrystalline	230	7.20*	30
46	Aleo Solar	A79U235 ulr	Monocrystalline	235	7.20*	31
47	Aleo Solar	S79U235 ulr	Monocrystalline	235	7.20*	31
48	Aleo Solar	S19U235 ulr	Monocrystalline	235	7.16*	28
49	Aleo Solar	A18.230	Polycrystalline	230	7.15*	28
50	Aleo Solar	S79.230	Monocrystalline	230	7.05*	24
51	Aleo Solar	A79.230	Monocrystalline	230	7.05*	23
52	Aleo Solar	S79U230 ulr	Monocrystalline	230	7.04*	23
53	Aleo Solar	A79U230 ulr	Monocrystalline	230	7.04*	23
54	Aleo Solar	S18U225 ulr	Polycrystalline	225	7.04*	23
55	Aleo Solar	A18U225 ulr	Polycrystalline	225	7.04*	23
56	Aleo Solar	A18.225	Polycrystalline	225	6.99*	21
57	Aleo Solar	S18U220 ulr	Polycrystalline	220	6.86*	16
58	Aleo Solar	A18U220 ulr	Polycrystalline	220	6.86*	16
59	Aleo Solar	A18.220	Polycrystalline	220	6.83*	15
60	Aleo Solar	A18U215 ulr	Polycrystalline	215	6.69*	11
61	Aleo Solar	S18U215 ulr	Polycrystalline	215	6.69*	11
62	Aleo Solar	A18.215	Polycrystalline	215	6.67*	11
63	Aleo Solar	S18U210 ulr	Polycrystalline	210	6.54*	8
64	Aleo Solar	A18U210 ulr	Polycrystalline	210	6.54*	8
65	Aleo Solar	A18.210	Polycrystalline	210	6.51*	8

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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.