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 ET Solar Industry

Here are the PSI Ratings for modules from ET Solar Industry, 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	ET Solar Industry	ET-M572185WWZ	Monocrystalline	185	8.39*	89
2	ET Solar Industry	ET-M572185WW	Monocrystalline	185	8.39*	89
3	ET Solar Industry	ET-P672280WW	Polycrystalline	280	8.28*	86
4	ET Solar Industry	ET-P672280WB	Polycrystalline	280	8.28*	86
5	ET Solar Industry	ET-P660260WWZ	Polycrystalline	260	8.26*	85
6	ET Solar Industry	ET-P660260WB	Polycrystalline	260	8.26*	85
7	ET Solar Industry	ET-P660260WWAC	Polycrystalline	260	8.26*	85
8	ET Solar Industry	ET-P660260WW	Polycrystalline	260	8.26*	85
9	ET Solar Industry	ET-P660260WWZAC	Polycrystalline	260	8.26*	85
10	ET Solar Industry	ET-P660260WBAC	Polycrystalline	260	8.26*	85
11	ET Solar Industry	ET-P660260WBZ	Polycrystalline	260	8.26*	85
12	ET Solar Industry	ET-P660260WBZAC	Polycrystalline	260	8.26*	85
13	ET Solar Industry	ET-A-M660265	Monocrystalline	265	8.22*	84
14	ET Solar Industry	ET-A-M660265B	Monocrystalline	265	8.22*	84
15	ET Solar Industry	ET-M572180WWZ	Monocrystalline	180	8.18*	83
16	ET Solar Industry	ET-M572180WW	Monocrystalline	180	8.18*	83
17	ET Solar Industry	ET-P672275WB	Polycrystalline	275	8.13*	81
18	ET Solar Industry	ET-P672275WW	Polycrystalline	275	8.13*	81
19	ET Solar Industry	ET-M660260BB	Monocrystalline	260	8.12*	80
20	ET Solar Industry	ET-P660255WB	Polycrystalline	255	8.10*	80
21	ET Solar Industry	ET-P660255WBZAC	Polycrystalline	255	8.10*	80
22	ET Solar Industry	ET-P660255WWZAC	Polycrystalline	255	8.10*	80
23	ET Solar Industry	ET-P660255WBZ	Polycrystalline	255	8.10*	80
24	ET Solar Industry	ET-P660255WW	Polycrystalline	255	8.10*	80
25	ET Solar Industry	ET-P660255WWZ	Polycrystalline	255	8.10*	80
26	ET Solar Industry	ET-P660255WBAC	Polycrystalline	255	8.10*	80
27	ET Solar Industry	ET-P660255WWAC	Polycrystalline	255	8.10*	80
28	ET Solar Industry	ET-M660260WW	Monocrystalline	260	8.10*	80
29	ET Solar Industry	ET-A-P672275B	Polycrystalline	275	8.09*	79
30	ET Solar Industry	ET-A-P672275	Polycrystalline	275	8.09*	79
31	ET Solar Industry	ET-P672305WWG	Polycrystalline	305	8.08*	79
32	ET Solar Industry	ET-A-M660260B	Monocrystalline	260	8.07*	79
33	ET Solar Industry	ET-A-M660260	Monocrystalline	260	8.07*	78
34	ET Solar Industry	ET-P672310WW	Polycrystalline	310	8.05*	78
35	ET Solar Industry	ET-P672310WB	Polycrystalline	310	8.05*	78
36	ET Solar Industry	ET-P660255BBZAC	Polycrystalline	255	8.04*	77
37	ET Solar Industry	ET-P660255BBZ	Polycrystalline	255	8.04*	77
38	ET Solar Industry	ET-P660255BBAC	Polycrystalline	255	8.04*	77
39	ET Solar Industry	ET-P660255BB	Polycrystalline	255	8.04*	77
40	ET Solar Industry	ET-P672305WBG	Polycrystalline	305	8.01*	76
41	ET Solar Industry	ET-A-M672305	Monocrystalline	305	7.99*	75
42	ET Solar Industry	ET-A-M672305B	Monocrystalline	305	7.99*	75
43	ET Solar Industry	ET-P672270WW	Polycrystalline	270	7.98*	74
44	ET Solar Industry	ET-P672270WB	Polycrystalline	270	7.98*	74
45	ET Solar Industry	ET-M660255WW	Monocrystalline	255	7.97*	74
46	ET Solar Industry	ET-M660255BB	Monocrystalline	255	7.97*	74
47	ET Solar Industry	ET-P672300WBG	Polycrystalline	300	7.95*	73
48	ET Solar Industry	ET-P672300WWG	Polycrystalline	300	7.95*	73
49	ET Solar Industry	ET-P672265WW	Polycrystalline	265	7.95*	73
50	ET Solar Industry	ET-P672265WB	Polycrystalline	265	7.95*	73
51	ET Solar Industry	ET-A-M660255	Monocrystalline	255	7.95*	73
52	ET Solar Industry	ET-A-M660255B	Monocrystalline	255	7.95*	73
53	ET Solar Industry	ET-P672305WW	Polycrystalline	305	7.92*	71
54	ET Solar Industry	ET-P672305WB	Polycrystalline	305	7.92*	71
55	ET Solar Industry	ET-P660250BB	Polycrystalline	250	7.89*	70
56	ET Solar Industry	ET-P660250BBZ	Polycrystalline	250	7.89*	70
57	ET Solar Industry	ET-P660250WW	Polycrystalline	250	7.86*	69
58	ET Solar Industry	ET-A-M672300	Monocrystalline	300	7.86*	69
59	ET Solar Industry	ET-A-M672300B	Monocrystalline	300	7.86*	69
60	ET Solar Industry	ET-P660250WWZ	Polycrystalline	250	7.86*	69
61	ET Solar Industry	ET-P660250WB	Polycrystalline	250	7.86*	69
62	ET Solar Industry	ET-P660250WBAC	Polycrystalline	250	7.86*	69
63	ET Solar Industry	ET-P660250WBZ	Polycrystalline	250	7.86*	69
64	ET Solar Industry	ET-M572175WWZ	Monocrystalline	175	7.85*	68
65	ET Solar Industry	ET-M572175WW	Monocrystalline	175	7.85*	68
66	ET Solar Industry	ET-P672295WWG	Polycrystalline	295	7.82*	66
67	ET Solar Industry	ET-M660250BB	Monocrystalline	250	7.82*	66
68	ET Solar Industry	ET-P672295WBG	Polycrystalline	295	7.82*	66
69	ET Solar Industry	ET-P672260WW	Polycrystalline	260	7.82*	66
70	ET Solar Industry	ET-P672260WB	Polycrystalline	260	7.82*	66
71	ET Solar Industry	ET-M660250WW	Monocrystalline	250	7.81*	66
72	ET Solar Industry	ET-P672300WW	Polycrystalline	300	7.79*	64
73	ET Solar Industry	ET-P672300WB	Polycrystalline	300	7.79*	64
74	ET Solar Industry	ET-A-M660250	Monocrystalline	250	7.79*	65
75	ET Solar Industry	ET-A-M660250B	Monocrystalline	250	7.79*	65
76	ET Solar Industry	ET-P660250BAC	Polycrystalline	250	7.78*	64
77	ET Solar Industry	ET-P660250WBZAC	Polycrystalline	250	7.78*	64
78	ET Solar Industry	ET-A-M672295	Monocrystalline	295	7.73*	62
79	ET Solar Industry	ET-A-M672295B	Monocrystalline	295	7.73*	62
80	ET Solar Industry	ET-P660245BBZ	Polycrystalline	245	7.72*	61
81	ET Solar Industry	ET-P660245BB	Polycrystalline	245	7.72*	61
82	ET Solar Industry	ET-P660245B	Polycrystalline	245	7.70*	60
83	ET Solar Industry	ET-P660245WB	Polycrystalline	245	7.70*	60
84	ET Solar Industry	ET-P660245WW	Polycrystalline	245	7.70*	60
85	ET Solar Industry	ET-P660245WWZ	Polycrystalline	245	7.70*	60
86	ET Solar Industry	ET-P660245WBZ	Polycrystalline	245	7.70*	60
87	ET Solar Industry	ET-A-P672295B	Polycrystalline	295	7.70*	60
88	ET Solar Industry	ET-A-P672295	Polycrystalline	295	7.70*	60
89	ET Solar Industry	ET-P672290WWG	Polycrystalline	290	7.69*	59
90	ET Solar Industry	ET-P672290WBG	Polycrystalline	290	7.69*	59
91	ET Solar Industry	ET-M660245BB	Monocrystalline	245	7.66*	57
92	ET Solar Industry	ET-M660245WW	Monocrystalline	245	7.65*	57
93	ET Solar Industry	ET-P672295WB	Polycrystalline	295	7.65*	57
94	ET Solar Industry	ET-P672295WW	Polycrystalline	295	7.65*	57
95	ET Solar Industry	ET-P672255	Polycrystalline	255	7.65*	57
96	ET Solar Industry	ET-A-M660245B	Monocrystalline	245	7.64*	56
97	ET Solar Industry	ET-A-M660245	Monocrystalline	245	7.64*	56
98	ET Solar Industry	ET-A-P660245	Polycrystalline	245	7.64*	56
99	ET Solar Industry	ET-A-P660240	Polycrystalline	240	7.64*	56
100	ET Solar Industry	ET-A-P660240B	Polycrystalline	240	7.64*	56
101	ET Solar Industry	ET-A-P660245B	Polycrystalline	245	7.64*	56
102	ET Solar Industry	ET-P660250BBAC	Polycrystalline	250	7.63*	55
103	ET Solar Industry	ET-P660250BBZAC	Polycrystalline	250	7.63*	55
104	ET Solar Industry	ET-M572170WWZ	Monocrystalline	170	7.63*	56
105	ET Solar Industry	ET-M572170WW	Monocrystalline	170	7.63*	56
106	ET Solar Industry	ET-P672290WW	Polycrystalline	290	7.62*	55
107	ET Solar Industry	ET-P672290WB	Polycrystalline	290	7.62*	55
108	ET Solar Industry	ET-P660245WBZAC	Polycrystalline	245	7.62*	55
109	ET Solar Industry	ET-P660245BAC	Polycrystalline	245	7.62*	55
110	ET Solar Industry	ET-P660240B	Polycrystalline	240	7.60*	54
111	ET Solar Industry	ET-P660240WW	Polycrystalline	240	7.60*	54
112	ET Solar Industry	ET-P660240WB	Polycrystalline	240	7.60*	54
113	ET Solar Industry	ET-P660240WBZ	Polycrystalline	240	7.60*	54
114	ET Solar Industry	ET-P660240WWZ	Polycrystalline	240	7.60*	54
115	ET Solar Industry	ET-A-M672290B	Monocrystalline	290	7.59*	54
116	ET Solar Industry	ET-A-M672290	Monocrystalline	290	7.59*	54
117	ET Solar Industry	ET-P660240BB	Polycrystalline	240	7.57*	52
118	ET Solar Industry	ET-P660240BBZ	Polycrystalline	240	7.57*	52
119	ET Solar Industry	ET-A-P672290B	Polycrystalline	290	7.56*	52
120	ET Solar Industry	ET-A-P672290	Polycrystalline	290	7.56*	52
121	ET Solar Industry	ET-P672285WBG	Polycrystalline	285	7.55*	51
122	ET Solar Industry	ET-P672285WWG	Polycrystalline	285	7.55*	51
123	ET Solar Industry	ET-P660235WWZ	Polycrystalline	235	7.53*	49
124	ET Solar Industry	ET-P660235WBZ	Polycrystalline	235	7.53*	49
125	ET Solar Industry	ET-P660235WW	Polycrystalline	235	7.53*	49
126	ET Solar Industry	ET-P660235WB	Polycrystalline	235	7.53*	49
127	ET Solar Industry	ET-P660235B	Polycrystalline	235	7.53*	49
128	ET Solar Industry	ET-M660240BB	Monocrystalline	240	7.52*	49
129	ET Solar Industry	ET-P672250	Polycrystalline	250	7.52*	49
130	ET Solar Industry	ET-M660240WW	Monocrystalline	240	7.50*	48
131	ET Solar Industry	ET-A-M660240	Monocrystalline	240	7.49*	47
132	ET Solar Industry	ET-A-M660240B	Monocrystalline	240	7.49*	47
133	ET Solar Industry	ET-A-P660235	Polycrystalline	235	7.48*	47
134	ET Solar Industry	ET-A-P660235B	Polycrystalline	235	7.48*	47
135	ET Solar Industry	ET-P672285WB	Polycrystalline	285	7.48*	47
136	ET Solar Industry	ET-P672285WW	Polycrystalline	285	7.48*	47
137	ET Solar Industry	ET-P660245BBAC	Polycrystalline	245	7.47*	46
138	ET Solar Industry	ET-A-M672285	Monocrystalline	285	7.47*	46
139	ET Solar Industry	ET-A-M672285B	Monocrystalline	285	7.47*	46
140	ET Solar Industry	ET-P660245BBZAC	Polycrystalline	245	7.47*	46
141	ET Solar Industry	ET-M572190WWZ	Monocrystalline	190	7.46*	46
142	ET Solar Industry	ET-M572190BBZ	Monocrystalline	190	7.46*	46
143	ET Solar Industry	ET-M572190WW	Monocrystalline	190	7.46*	46
144	ET Solar Industry	ET-M572190WB	Monocrystalline	190	7.46*	46
145	ET Solar Industry	ET-A-P672285B	Polycrystalline	285	7.44*	44
146	ET Solar Industry	ET-A-P672285	Polycrystalline	285	7.44*	44
147	ET Solar Industry	ET-P672280WWG	Polycrystalline	280	7.42*	43
148	ET Solar Industry	ET-P672280WBG	Polycrystalline	280	7.42*	43
149	ET Solar Industry	ET-P660235BBZ	Polycrystalline	235	7.41*	42
150	ET Solar Industry	ET-P660235BB	Polycrystalline	235	7.41*	42
151	ET Solar Industry	ET-M572165WW	Monocrystalline	165	7.38*	40
152	ET Solar Industry	ET-M572165WWZ	Monocrystalline	165	7.38*	40
153	ET Solar Industry	ET-M572185BB	Monocrystalline	185	7.38*	41
154	ET Solar Industry	ET-M572185BBZ	Monocrystalline	185	7.38*	41
155	ET Solar Industry	ET-P660230WBZ	Polycrystalline	230	7.37*	40
156	ET Solar Industry	ET-P660230WW	Polycrystalline	230	7.37*	40
157	ET Solar Industry	ET-P660230WWZ	Polycrystalline	230	7.37*	40
158	ET Solar Industry	ET-P660230WB	Polycrystalline	230	7.37*	40
159	ET Solar Industry	ET-P660230B	Polycrystalline	230	7.37*	40
160	ET Solar Industry	ET-A-P660230B	Polycrystalline	230	7.33*	37
161	ET Solar Industry	ET-A-P660230	Polycrystalline	230	7.33*	38
162	ET Solar Industry	ET-A-M660235	Monocrystalline	235	7.33*	37
163	ET Solar Industry	ET-A-M660235B	Monocrystalline	235	7.33*	37
164	ET Solar Industry	ET-A-P672280B	Polycrystalline	280	7.31*	36
165	ET Solar Industry	ET-A-P672280	Polycrystalline	280	7.31*	36
166	ET Solar Industry	ET-P660225WBZ	Polycrystalline	225	7.21*	31
167	ET Solar Industry	ET-P660225WW	Polycrystalline	225	7.21*	31
168	ET Solar Industry	ET-P660225WWZ	Polycrystalline	225	7.21*	31
169	ET Solar Industry	ET-P660225WB	Polycrystalline	225	7.21*	31
170	ET Solar Industry	ET-M572180BBZ	Monocrystalline	180	7.18*	29
171	ET Solar Industry	ET-M572180BB	Monocrystalline	180	7.18*	29
172	ET Solar Industry	ET-A-P660225	Polycrystalline	225	7.17*	29
173	ET Solar Industry	ET-A-P660225B	Polycrystalline	225	7.17*	29
174	ET Solar Industry	ET-P654210WW	Polycrystalline	210	7.17*	29
175	ET Solar Industry	ET-P654210WB	Polycrystalline	210	7.17*	29
176	ET Solar Industry	ET-P660220WWZ	Polycrystalline	220	7.05*	23
177	ET Solar Industry	ET-P660220WW	Polycrystalline	220	7.05*	23
178	ET Solar Industry	ET-P660220WB	Polycrystalline	220	7.05*	23
179	ET Solar Industry	ET-P660220WBZ	Polycrystalline	220	7.05*	23
180	ET Solar Industry	ET-P654205WW	Polycrystalline	205	6.98*	20
181	ET Solar Industry	ET-P654205WB	Polycrystalline	205	6.98*	20
182	ET Solar Industry	ET-M572175BB	Monocrystalline	175	6.97*	20
183	ET Solar Industry	ET-M572175BBZ	Monocrystalline	175	6.97*	20
184	ET Solar Industry	ET-P654200WB	Polycrystalline	200	6.83*	15
185	ET Solar Industry	ET-P654200WW	Polycrystalline	200	6.83*	15
186	ET Solar Industry	ET-P654195WB	Polycrystalline	195	6.65*	10
187	ET Solar Industry	ET-P654195WW	Polycrystalline	195	6.65*	10
188	ET Solar Industry	ET-P654190WB	Polycrystalline	190	6.48*	7
189	ET Solar Industry	ET-P654190WW	Polycrystalline	190	6.48*	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.