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 KISCO

Here are the PSI Ratings for modules from KISCO, 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	KISCO	GETWATT 262M-A1U	Monocrystalline	262	8.16*	82
2	KISCO	GETWATT 261M-A1U	Monocrystalline	261	8.13*	81
3	KISCO	GETWATT 260M-A1U	Monocrystalline	260	8.10*	79
4	KISCO	GETWATT 255M-C1U	Monocrystalline	255	8.08*	79
5	KISCO	GETWATT 259M-A1U	Monocrystalline	259	8.07*	79
6	KISCO	GETWATT 258M-A1U	Monocrystalline	258	8.04*	77
7	KISCO	GETWATT 257M-A1U	Monocrystalline	257	8.01*	76
8	KISCO	GETWATT 256M-A1U	Monocrystalline	256	7.98*	74
9	KISCO	GETWATT 255M-A1U	Monocrystalline	255	7.95*	73
10	KISCO	GETWATT 254M-A1U	Monocrystalline	254	7.92*	71
11	KISCO	GETWATT 253M-A1U	Monocrystalline	253	7.89*	70
12	KISCO	GETWATT 252M-A1U	Monocrystalline	252	7.85*	68
13	KISCO	GETWATT 251M-A1U	Monocrystalline	251	7.82*	66
14	KISCO	GETWATT 250M-A1U	Monocrystalline	250	7.78*	64
15	KISCO	GETWATT 249M-A1U	Monocrystalline	249	7.75*	63
16	KISCO	GETWATT 248M-A1U	Monocrystalline	248	7.73*	61
17	KISCO	GETWATT 245P-A1U	Polycrystalline	245	7.71*	61
18	KISCO	GETWATT 247M-A1U	Monocrystalline	247	7.69*	59
19	KISCO	GETWATT 244P-A1U	Polycrystalline	244	7.68*	59
20	KISCO	GETWATT 246M-A1U	Monocrystalline	246	7.67*	58
21	KISCO	GETWATT 243P-A1U	Polycrystalline	243	7.65*	57
22	KISCO	GETWATT 245M-A1U	Monocrystalline	245	7.63*	56
23	KISCO	GETWATT 242P-A1U	Polycrystalline	242	7.62*	55
24	KISCO	GETWATT 244M-A1U	Monocrystalline	244	7.60*	54
25	KISCO	GETWATT 254M-C1U	Monocrystalline	254	7.59*	53
26	KISCO	GETWATT 241P-A1U	Polycrystalline	241	7.59*	53
27	KISCO	GETWATT 243M-A1U	Monocrystalline	243	7.57*	52
28	KISCO	GETWATT 253M-C1U	Monocrystalline	253	7.56*	52
29	KISCO	GETWATT 240P-A1U	Polycrystalline	240	7.55*	51
30	KISCO	GETWATT 252M-C1U	Monocrystalline	252	7.53*	49
31	KISCO	GETWATT 242M-A1U	Monocrystalline	242	7.53*	50
32	KISCO	GETWATT 239P-A1U	Polycrystalline	239	7.52*	49
33	KISCO	GETWATT 251M-C1U	Monocrystalline	251	7.50*	48
34	KISCO	GETWATT 241M-A1U	Monocrystalline	241	7.50*	48
35	KISCO	GETWATT 238P-A1U	Polycrystalline	238	7.48*	47
36	KISCO	GETWATT 250M-C1U	Monocrystalline	250	7.47*	46
37	KISCO	GETWATT 237P-A1U	Polycrystalline	237	7.46*	45
38	KISCO	GETWATT 240M-A1U	Monocrystalline	240	7.46*	46
39	KISCO	GETWATT 239M-A1U	Monocrystalline	239	7.44*	44
40	KISCO	GETWATT 249M-C1U	Monocrystalline	249	7.44*	44
41	KISCO	GETWATT 236P-A1U	Polycrystalline	236	7.43*	43
42	KISCO	GETWATT 248M-C1U	Monocrystalline	248	7.41*	42
43	KISCO	GETWATT 238M-A1U	Monocrystalline	238	7.41*	42
44	KISCO	GETWATT 235P-A1U	Polycrystalline	235	7.39*	41
45	KISCO	GETWATT 247M-C1U	Monocrystalline	247	7.38*	40
46	KISCO	GETWATT 234P-A1U	Polycrystalline	234	7.36*	39
47	KISCO	GETWATT 246M-C1U	Monocrystalline	246	7.35*	39
48	KISCO	GETWATT 245M-C1U	Monocrystalline	245	7.33*	37
49	KISCO	GETWATT 233P-A1U	Polycrystalline	233	7.32*	37
50	KISCO	GETWATT 244M-C1U	Monocrystalline	244	7.29*	35
51	KISCO	GETWATT 232P-A1U	Polycrystalline	232	7.29*	35
52	KISCO	GETWATT 231P-A1U	Polycrystalline	231	7.27*	34
53	KISCO	GETWATT 243M-C1U	Monocrystalline	243	7.27*	34
54	KISCO	GETWATT 242M-C1U	Monocrystalline	242	7.24*	32
55	KISCO	GETWATT 230P-A1U	Polycrystalline	230	7.24*	33
56	KISCO	GETWATT 229P-A1U	Polycrystalline	229	7.21*	31
57	KISCO	GETWATT 241M-C1U	Monocrystalline	241	7.21*	31
58	KISCO	GETWATT 240M-C1U	Monocrystalline	240	7.18*	29
59	KISCO	GETWATT 228P-A1U	Polycrystalline	228	7.17*	29
60	KISCO	GETWATT 227P-A1U	Polycrystalline	227	7.14*	27
61	KISCO	GETWATT 226P-A1U	Polycrystalline	226	7.11*	26
62	KISCO	GETWATT 225P-A1U	Polycrystalline	225	7.08*	25
63	KISCO	GETWATT 224P-A1U	Polycrystalline	224	7.04*	23
64	KISCO	S101E	Thin Film	101	3.79*	1
65	KISCO	S100E	Thin Film	100	3.74*	1
66	KISCO	S99E	Thin Film	99	3.72*	1
67	KISCO	S98E	Thin Film	98	3.67*	1
68	KISCO	S97E	Thin Film	97	3.64*	1
69	KISCO	S96E	Thin Film	96	3.62*	0
70	KISCO	S95E	Thin Film	95	3.57*	0
71	KISCO	S94E	Thin Film	94	3.55*	0
72	KISCO	S93E	Thin Film	93	3.49*	0
73	KISCO	S92E	Thin Film	92	3.47*	0
74	KISCO	S91E	Thin Film	91	3.40*	0

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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.