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 Canadian Solar

Here are the PSI Ratings for modules from Canadian 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	Canadian Solar	CS6P-285M	Monocrystalline	285	9.44*	98
2	Canadian Solar	CS6P-285MX	Monocrystalline	285	9.44*	98
3	Canadian Solar	CS6X-310P	Polycrystalline	310	9.36	98
4	Canadian Solar	CS6P-265MM	Monocrystalline	265	9.29	97
5	Canadian Solar	CS6P-280MX	Monocrystalline	280	9.29*	97
6	Canadian Solar	CS6P-280M	Monocrystalline	280	9.29*	97
7	Canadian Solar	CS6X-305P	Polycrystalline	305	9.21	97
8	Canadian Solar	CS6P-260MM	Monocrystalline	260	9.14	97
9	Canadian Solar	CS6P-275M	Monocrystalline	275	9.14*	97
10	Canadian Solar	CS6P-275MX	Monocrystalline	275	9.14*	97
11	Canadian Solar	CS6X-300P	Polycrystalline	300	9.05	97
12	Canadian Solar	CS6P-250PX	Polycrystalline	250	9.03	97
13	Canadian Solar	CS6P-250P	Polycrystalline	250	9.03	97
14	Canadian Solar	CS6K-285M	Monocrystalline	285	9.02*	97
15	Canadian Solar	CS6X-300M	Monocrystalline	300	8.98	96
16	Canadian Solar	CS6P-270M	Monocrystalline	270	8.95*	96
17	Canadian Solar	CS6P-270MX	Monocrystalline	270	8.95*	96
18	Canadian Solar	CS6P-255MM	Monocrystalline	255	8.94	96
19	Canadian Solar	CS6A-210MM	Monocrystalline	210	8.94	96
20	Canadian Solar	CS6P-265PX	Polycrystalline	265	8.93*	96
21	Canadian Solar	CS6P-265P	Polycrystalline	265	8.93*	96
22	Canadian Solar	CS6X-295P	Polycrystalline	295	8.89	96
23	Canadian Solar	CS6P-255PM	Polycrystalline	255	8.88	96
24	Canadian Solar	CS6K-280M	Monocrystalline	280	8.87*	96
25	Canadian Solar	CS6X-315P	Polycrystalline	315	8.86*	95
26	Canadian Solar	CS6P-245P	Polycrystalline	245	8.86	95
27	Canadian Solar	CS6P-245PX	Polycrystalline	245	8.86	95
28	Canadian Solar	CS6X-295M	Monocrystalline	295	8.84	95
29	Canadian Solar	CS6P-250M	Monocrystalline	250	8.78	95
30	Canadian Solar	CS6P-260P	Polycrystalline	260	8.77*	95
31	Canadian Solar	CS6P-260PX	Polycrystalline	260	8.77*	95
32	Canadian Solar	CS6P-260P-EA	Polycrystalline	260	8.77*	95
33	Canadian Solar	CS6P-250MM	Monocrystalline	250	8.77	95
34	Canadian Solar	CS6P-250PT	Polycrystalline	250	8.75	95
35	Canadian Solar	CS6X-290P	Polycrystalline	290	8.75	94
36	Canadian Solar	CS6K-275M	Monocrystalline	275	8.74*	94
37	Canadian Solar	CS6P-250MX	Monocrystalline	250	8.73	94
38	Canadian Solar	CS6A-205MM	Monocrystalline	205	8.73	94
39	Canadian Solar	CS6P-250PM	Polycrystalline	250	8.71	94
40	Canadian Solar	CS6X-290M	Monocrystalline	290	8.69	94
41	Canadian Solar	CS6P-265M	Monocrystalline	265	8.69*	94
42	Canadian Solar	CS6P-265MX	Monocrystalline	265	8.64*	93
43	Canadian Solar	CS6X-310M	Monocrystalline	310	8.63*	93
44	Canadian Solar	CS6P-245M	Monocrystalline	245	8.62	93
45	Canadian Solar	CS6P-245MM	Monocrystalline	245	8.61	93
46	Canadian Solar	CS6X-285P	Polycrystalline	285	8.60	92
47	Canadian Solar	CS6P-245PT	Polycrystalline	245	8.59	92
48	Canadian Solar	CS5A-200M	Monocrystalline	200	8.57	92
49	Canadian Solar	CS6P-245MX	Monocrystalline	245	8.57	92
50	Canadian Solar	CS6P-255P	Polycrystalline	255	8.57*	92
51	Canadian Solar	CS6P-255PX	Polycrystalline	255	8.57*	92
52	Canadian Solar	CS6P-255P-EA	Polycrystalline	255	8.57*	92
53	Canadian Solar	CS6P-245PM	Polycrystalline	245	8.55	92
54	Canadian Solar	CS6K-270M	Monocrystalline	270	8.55*	92
55	Canadian Solar	CS6K-265P	Polycrystalline	265	8.53*	92
56	Canadian Solar	CS6X-285M	Monocrystalline	285	8.52	91
57	Canadian Solar	CS6K-265P-PG	Polycrystalline	265	8.51*	91
58	Canadian Solar	CS5P-255M	Monocrystalline	255	8.51	91
59	Canadian Solar	CS6P-260M	Monocrystalline	260	8.51*	91
60	Canadian Solar	CS6X-305M	Monocrystalline	305	8.50*	91
61	Canadian Solar	CS6P-240PX	Polycrystalline	240	8.49	91
62	Canadian Solar	CS6P-240P	Polycrystalline	240	8.49	91
63	Canadian Solar	CS6A-200MM	Monocrystalline	200	8.49	91
64	Canadian Solar	CS6P-260M-EA	Monocrystalline	260	8.48*	91
65	Canadian Solar	CS6P-240M	Monocrystalline	240	8.48	91
66	Canadian Solar	CS6P-260MX	Monocrystalline	260	8.45*	90
67	Canadian Solar	CS6K-265M	Monocrystalline	265	8.44*	90
68	Canadian Solar	CS6P-240PT	Polycrystalline	240	8.42	89
69	Canadian Solar	CS6P-250P-EA	Polycrystalline	250	8.41*	89
70	Canadian Solar	CS6K-260P	Polycrystalline	260	8.38*	88
71	Canadian Solar	CS6X-280M	Monocrystalline	280	8.38	89
72	Canadian Solar	CS6K-265P-FG	Polycrystalline	265	8.37*	88
73	Canadian Solar	CS6P-240PM	Polycrystalline	240	8.37	88
74	Canadian Solar	CS5P-250M	Monocrystalline	250	8.36	88
75	Canadian Solar	CS6K-260P-PG	Polycrystalline	260	8.35*	88
76	Canadian Solar	CS5A-195MX	Monocrystalline	195	8.35	88
77	Canadian Solar	CS5A-195M	Monocrystalline	195	8.35	88
78	Canadian Solar	CS6P-255M-EA	Monocrystalline	255	8.33*	87
79	Canadian Solar	CS6P-255M	Monocrystalline	255	8.33*	87
80	Canadian Solar	CS6P-235P	Polycrystalline	235	8.32	87
81	Canadian Solar	CS6P-235M	Monocrystalline	235	8.32	87
82	Canadian Solar	CS6P-240MX	Monocrystalline	240	8.29	86
83	Canadian Solar	CS6P-255MX	Monocrystalline	255	8.27*	86
84	Canadian Solar	CS6A-195MM	Monocrystalline	195	8.27	86
85	Canadian Solar	CS6P-245P-EA	Polycrystalline	245	8.26*	85
86	Canadian Solar	CS6P-235PT	Polycrystalline	235	8.25	85
87	Canadian Solar	CS6K-260M	Monocrystalline	260	8.25*	85
88	Canadian Solar	CS5P-245M	Monocrystalline	245	8.24	85
89	Canadian Solar	CS6K-260P-FG	Polycrystalline	260	8.22*	84
90	Canadian Solar	CS6P-235PM	Polycrystalline	235	8.21	84
91	Canadian Solar	CS6K-255P-PG	Polycrystalline	255	8.19*	83
92	Canadian Solar	CS6K-255P	Polycrystalline	255	8.19*	83
93	Canadian Solar	CS6P-235PX	Polycrystalline	235	8.17	82
94	Canadian Solar	CS6P-250M-EA	Monocrystalline	250	8.16*	82
95	Canadian Solar	CS6P-230M	Monocrystalline	230	8.14	81
96	Canadian Solar	CS6P-235MX	Monocrystalline	235	8.13	81
97	Canadian Solar	CS5A-190MX	Monocrystalline	190	8.12	80
98	Canadian Solar	CS5A-190M	Monocrystalline	190	8.12	80
99	Canadian Solar	CS6K-255M	Monocrystalline	255	8.08*	79
100	Canadian Solar	CS6X-280P	Polycrystalline	280	8.08	79
101	Canadian Solar	CS6P-230PT	Polycrystalline	230	8.07	79
102	Canadian Solar	CS6K-245P	Polycrystalline	245	8.07*	79
103	Canadian Solar	CS6A-190MM	Monocrystalline	190	8.06	78
104	Canadian Solar	CS6P-230PE	Polycrystalline	230	8.05	77
105	Canadian Solar	CS6K-255P-FG	Polycrystalline	255	8.05*	78
106	Canadian Solar	CS6K-250P	Polycrystalline	250	8.04*	77
107	Canadian Solar	CS6X-275M	Monocrystalline	275	8.03	77
108	Canadian Solar	CS6K-250P-PG	Polycrystalline	250	8.02*	77
109	Canadian Solar	CS6P-245M-EA	Monocrystalline	245	8.01*	76
110	Canadian Solar	CS6P-230PX	Polycrystalline	230	7.97	74
111	Canadian Solar	CS6P-230P	Polycrystalline	230	7.97	74
112	Canadian Solar	CS6P-230MX	Monocrystalline	230	7.95	73
113	Canadian Solar	CS6X-275P	Polycrystalline	275	7.93	72
114	Canadian Solar	CS6K-250M	Monocrystalline	250	7.93*	72
115	Canadian Solar	CS5A-185MX	Monocrystalline	185	7.93	72
116	Canadian Solar	CS5A-185M	Monocrystalline	185	7.93	72
117	Canadian Solar	CS6K-250P-FG	Polycrystalline	250	7.89*	70
118	Canadian Solar	CS6X-270M	Monocrystalline	270	7.88	70
119	Canadian Solar	CS6K-245P-PG	Polycrystalline	245	7.87*	69
120	Canadian Solar	CS5P-240P	Polycrystalline	240	7.85	68
121	Canadian Solar	CS6P-225PE	Polycrystalline	225	7.85	68
122	Canadian Solar	CS6P-225PX	Polycrystalline	225	7.81	66
123	Canadian Solar	CS6P-225P	Polycrystalline	225	7.81	66
124	Canadian Solar	CS6P-220M	Monocrystalline	220	7.80	66
125	Canadian Solar	CS5P-240M	Monocrystalline	240	7.78	64
126	Canadian Solar	CS6X-270P	Polycrystalline	270	7.77	64
127	Canadian Solar	CS6A-190P	Polycrystalline	190	7.74	62
128	Canadian Solar	CS6K-245P-FG	Polycrystalline	245	7.74*	62
129	Canadian Solar	CS6X-265M	Monocrystalline	265	7.73	62
130	Canadian Solar	CS5P-235P	Polycrystalline	235	7.68	58
131	Canadian Solar	CS6P-220PE	Polycrystalline	220	7.66	58
132	Canadian Solar	CS6P-220PX	Polycrystalline	220	7.65	57
133	Canadian Solar	CS6P-220P	Polycrystalline	220	7.65	57
134	Canadian Solar	CS5A-180MX	Monocrystalline	180	7.64	56
135	Canadian Solar	CS5A-180M	Monocrystalline	180	7.64	56
136	Canadian Solar	CS6P-215M	Monocrystalline	215	7.63	56
137	Canadian Solar	CS6X-265P	Polycrystalline	265	7.62	55
138	Canadian Solar	CS6X-260M	Monocrystalline	260	7.59	53
139	Canadian Solar	CS6A-185P	Polycrystalline	185	7.54	50
140	Canadian Solar	CS6C-145P	Polycrystalline	145	7.53*	49
141	Canadian Solar	CS5P-230P	Polycrystalline	230	7.52	49
142	Canadian Solar	CS5P-235M	Monocrystalline	235	7.51	49
143	Canadian Solar	CS6X-260P	Polycrystalline	260	7.48	47
144	Canadian Solar	CS6P-215PX	Polycrystalline	215	7.48	47
145	Canadian Solar	CS6P-215P	Polycrystalline	215	7.48	47
146	Canadian Solar	CS6P-215PE	Polycrystalline	215	7.48	47
147	Canadian Solar	CS6A-175P	Polycrystalline	175	7.47	46
148	Canadian Solar	CS6P-210M	Monocrystalline	210	7.46	45
149	Canadian Solar	CS6X-255M	Monocrystalline	255	7.45	45
150	Canadian Solar	CS6A-180P	Polycrystalline	180	7.41	42
151	Canadian Solar	CS5C-90M	Monocrystalline	90	7.39	41
152	Canadian Solar	CS5A-175MX	Monocrystalline	175	7.37	40
153	Canadian Solar	CS5A-175M	Monocrystalline	175	7.37	40
154	Canadian Solar	CS5P-225P	Polycrystalline	225	7.35	38
155	Canadian Solar	CS5P-230M	Monocrystalline	230	7.34	38
156	Canadian Solar	CS6X-255P	Polycrystalline	255	7.34	38
157	Canadian Solar	CS6P-210PE	Polycrystalline	210	7.33	38
158	Canadian Solar	CS6P-210PX	Polycrystalline	210	7.32	37
159	Canadian Solar	CS6P-210P	Polycrystalline	210	7.32	37
160	Canadian Solar	CS6C-140P	Polycrystalline	140	7.30*	36
161	Canadian Solar	CS6P-205M	Monocrystalline	205	7.28	35
162	Canadian Solar	CS5P-220P	Polycrystalline	220	7.21	31
163	Canadian Solar	CS5P-225M	Monocrystalline	225	7.18	29
164	Canadian Solar	CS5A-170M	Monocrystalline	170	7.17	29
165	Canadian Solar	CS5A-170MX	Monocrystalline	170	7.17	29
166	Canadian Solar	CS6P-205PX	Polycrystalline	205	7.16	28
167	Canadian Solar	CS6P-205P	Polycrystalline	205	7.16	28
168	Canadian Solar	CS5P-220M	Monocrystalline	220	7.03	22
169	Canadian Solar	CS6P-205PE	Polycrystalline	205	7.02	22
170	Canadian Solar	CS6P-200P	Polycrystalline	200	6.98	20
171	Canadian Solar	CS6P-200PX	Polycrystalline	200	6.98	20
172	Canadian Solar	CS5A-165M	Monocrystalline	165	6.96	19
173	Canadian Solar	CS5A-165MX	Monocrystalline	165	6.96	19
174	Canadian Solar	CS5P-215M	Monocrystalline	215	6.95	19
175	Canadian Solar	CS6A-170P	Polycrystalline	170	6.92	18
176	Canadian Solar	CS5P-210M	Monocrystalline	210	6.80	14
177	Canadian Solar	CS5A-160M	Monocrystalline	160	6.76	13
178	Canadian Solar	CS6A-165P	Polycrystalline	165	6.71	12
179	Canadian Solar	CS5P-205M	Monocrystalline	205	6.63	10
180	Canadian Solar	CS6P-200PE	Polycrystalline	200	6.61	9
181	Canadian Solar	CS5A-160MX	Monocrystalline	160	6.59	9
182	Canadian Solar	CS6A-160PE	Polycrystalline	160	6.58	9
183	Canadian Solar	CS5C-80M	Monocrystalline	80	6.57	9
184	Canadian Solar	CS5P-200M	Monocrystalline	200	6.47	7
185	Canadian Solar	CS6P-195PE	Polycrystalline	195	6.42	6
186	Canadian Solar	CS6A-155PE	Polycrystalline	155	6.38	6
187	Canadian Solar	CS5A-150M	Monocrystalline	150	6.36	6
188	Canadian Solar	CS6A-160P	Polycrystalline	160	6.36	6
189	Canadian Solar	CS6P-195P	Polycrystalline	195	6.35	6
190	Canadian Solar	CS5P-195M	Monocrystalline	195	6.30	5
191	Canadian Solar	CS6P-190PE	Polycrystalline	190	6.27	5
192	Canadian Solar	CS6P-190P	Polycrystalline	190	6.19	4
193	Canadian Solar	CS6A-150PE	Polycrystalline	150	6.17	4
194	Canadian Solar	CS6A-155P	Polycrystalline	155	6.16	4
195	Canadian Solar	CS6P-185PE	Polycrystalline	185	6.15	4
196	Canadian Solar	CS5A-155M	Monocrystalline	155	6.09	4
197	Canadian Solar	CS6P-185P	Polycrystalline	185	6.04	3
198	Canadian Solar	CS6A-150P	Polycrystalline	150	5.98	3
199	Canadian Solar	CS6P-180PE	Polycrystalline	180	5.97	3
200	Canadian Solar	CS6P-180P	Polycrystalline	180	5.95	3
201	Canadian Solar	CS6P-175PE	Polycrystalline	175	5.81	3
202	Canadian Solar	CS6P-170PE	Polycrystalline	170	5.63	2
203	Canadian Solar	CS6P-165PE	Polycrystalline	165	5.47	2
204	Canadian Solar	CS6P-160PE	Polycrystalline	160	5.29	2
205	Canadian Solar	CS5T-150M	Monocrystalline	150	5.17	2
206	Canadian Solar	CS5T-145M	Monocrystalline	145	5.00	2
207	Canadian Solar	CS5T-140M	Monocrystalline	140	4.87	1
208	Canadian Solar	CS5T-135M	Monocrystalline	135	4.70	1
209	Canadian Solar	CS5T-130M	Monocrystalline	130	4.54	1

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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.