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 Suntech Power

Here are the PSI Ratings for modules from Suntech Power, 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	Suntech Power	PLUTO210-Ade	Monocrystalline	210	8.61*	93
2	Suntech Power	PLUTO210-Ada	Monocrystalline	210	8.56*	92
3	Suntech Power	STP320-24/Ve	Polycrystalline	320	8.54*	92
4	Suntech Power	STP320-24/Vdx	Polycrystalline	320	8.54*	92
5	Suntech Power	STP320-24/Vd	Polycrystalline	320	8.54*	92
6	Suntech Power	PLUTO210-Adf	Monocrystalline	210	8.45*	90
7	Suntech Power	PLUTO210-Adb	Monocrystalline	210	8.45*	90
8	Suntech Power	PLUTO310-Vdx	Polycrystalline	310	8.44*	90
9	Suntech Power	STP315-24/Vd	Polycrystalline	315	8.41*	89
10	Suntech Power	STP315-24/Ver	Polycrystalline	315	8.41*	89
11	Suntech Power	STP315-24/Vdx	Polycrystalline	315	8.41*	89
12	Suntech Power	STP315-24/Ve	Polycrystalline	315	8.41*	89
13	Suntech Power	STP265-20/Wde	Polycrystalline	265	8.38*	88
14	Suntech Power	PLUTO205-Ade	Monocrystalline	205	8.38*	88
15	Suntech Power	STP265-20/Wd	Polycrystalline	265	8.38*	88
16	Suntech Power	PLUTO205-Ada	Monocrystalline	205	8.33*	87
17	Suntech Power	STP310-24/Vdx	Polycrystalline	310	8.33*	87
18	Suntech Power	STP260-20/Wdb	Polycrystalline	260	8.32*	87
19	Suntech Power	PLUTO305-Vdx	Polycrystalline	305	8.31*	87
20	Suntech Power	STP310-VRM-1	Polycrystalline	310	8.27*	86
21	Suntech Power	STP310-24/Ve	Polycrystalline	310	8.27*	86
22	Suntech Power	STP310-24/Vd	Polycrystalline	310	8.27*	86
23	Suntech Power	STP310-VRM-1.5	Polycrystalline	310	8.27*	86
24	Suntech Power	STP310-24/Ver	Polycrystalline	310	8.27*	86
25	Suntech Power	PLUTO310-Vdm	Polycrystalline	310	8.25*	85
26	Suntech Power	STP260S-20/Wde	Monocrystalline	260	8.25*	85
27	Suntech Power	STP260S-20/Wdb	Monocrystalline	260	8.25*	85
28	Suntech Power	PLUTO205-Adf	Monocrystalline	205	8.24*	84
29	Suntech Power	PLUTO205-Adb	Monocrystalline	205	8.24*	84
30	Suntech Power	STP260-20/Wd	Polycrystalline	260	8.23*	84
31	Suntech Power	STP260-20/Wde	Polycrystalline	260	8.23*	84
32	Suntech Power	STP255-20/Wdb	Polycrystalline	255	8.16*	82
33	Suntech Power	PLUTO300-Vdx	Polycrystalline	300	8.16*	82
34	Suntech Power	PLUTO230-Udm	Polycrystalline	230	8.12*	80
35	Suntech Power	PLUTO305-Vdm	Polycrystalline	305	8.11*	80
36	Suntech Power	STP305-24/Vdx	Polycrystalline	305	8.10*	80
37	Suntech Power	STP305-VRM-1.5	Polycrystalline	305	8.10*	80
38	Suntech Power	STP305-24/Ve	Polycrystalline	305	8.10*	80
39	Suntech Power	STP305-24/Vd	Polycrystalline	305	8.10*	80
40	Suntech Power	STP305-VRM-1	Polycrystalline	305	8.10*	80
41	Suntech Power	STP305-24/Ver	Polycrystalline	305	8.10*	80
42	Suntech Power	STP255S-20/Wde	Monocrystalline	255	8.09*	79
43	Suntech Power	PLUTO200-Ade	Monocrystalline	200	8.09*	79
44	Suntech Power	STP255S-20/Wdb	Monocrystalline	255	8.09*	79
45	Suntech Power	STP255-20/Wde	Polycrystalline	255	8.06*	78
46	Suntech Power	STP255-20/Wd	Polycrystalline	255	8.06*	78
47	Suntech Power	PLUTO295-Vdx	Polycrystalline	295	8.03*	77
48	Suntech Power	STP240-20/Wdb	Polycrystalline	240	8.01*	76
49	Suntech Power	STP250-20/Wdb	Polycrystalline	250	8.00*	76
50	Suntech Power	PLUTO200-Ada	Monocrystalline	200	7.99*	75
51	Suntech Power	STP300-VRM-1.5	Polycrystalline	300	7.98*	74
52	Suntech Power	STP300-24/Vdx	Polycrystalline	300	7.98*	74
53	Suntech Power	STP300-VRM-1	Polycrystalline	300	7.98*	74
54	Suntech Power	STP300-24/Ver	Polycrystalline	300	7.98*	74
55	Suntech Power	STP300-24/Vd	Polycrystalline	300	7.98*	74
56	Suntech Power	STP300-24/Ve	Polycrystalline	300	7.98*	74
57	Suntech Power	PLUTO300-Vdm	Polycrystalline	300	7.97*	74
58	Suntech Power	STP250S-20/Wde	Monocrystalline	250	7.95*	73
59	Suntech Power	STP250S-20/Wd	Monocrystalline	250	7.95*	73
60	Suntech Power	STP250S-20/Wdb	Monocrystalline	250	7.95*	73
61	Suntech Power	PLUTO225-Udm	Polycrystalline	225	7.94*	73
62	Suntech Power	PLUTO200-Adf	Monocrystalline	200	7.93*	72
63	Suntech Power	PLUTO200-Adb	Monocrystalline	200	7.93*	72
64	Suntech Power	STP250-20/Wde	Polycrystalline	250	7.90*	71
65	Suntech Power	STP250-20/Wd	Polycrystalline	250	7.90*	71
66	Suntech Power	PLUTO290-Vdx	Polycrystalline	290	7.89*	70
67	Suntech Power	PLUTO195-Ade	Monocrystalline	195	7.89*	70
68	Suntech Power	STP225-18/Ud	Polycrystalline	225	7.87*	69
69	Suntech Power	STP195S-24/Adb+	Monocrystalline	195	7.85*	68
70	Suntech Power	STP195S-24/Adb	Monocrystalline	195	7.85*	68
71	Suntech Power	STP245-20/Wdb	Polycrystalline	245	7.84*	67
72	Suntech Power	STP295-24/Ver	Polycrystalline	295	7.84*	68
73	Suntech Power	STP295-24/Vdx	Polycrystalline	295	7.84*	68
74	Suntech Power	STP295-VRM-1.5	Polycrystalline	295	7.84*	68
75	Suntech Power	STP295-24/Ve	Polycrystalline	295	7.84*	68
76	Suntech Power	STP295-VRM-1	Polycrystalline	295	7.84*	68
77	Suntech Power	PLUTO295-Vdm	Polycrystalline	295	7.84*	68
78	Suntech Power	STP295-24/Vd	Polycrystalline	295	7.84*	68
79	Suntech Power	STP195S-24/Ad	Monocrystalline	195	7.81*	66
80	Suntech Power	STP195S-24/Ad+	Monocrystalline	195	7.81*	66
81	Suntech Power	PLUTO195-Ada	Monocrystalline	195	7.80*	65
82	Suntech Power	STP245S-20/Wde	Monocrystalline	245	7.79*	65
83	Suntech Power	STP245S-20/Wdb	Monocrystalline	245	7.79*	65
84	Suntech Power	STP245S-20/Wd	Monocrystalline	245	7.79*	65
85	Suntech Power	PLUTO220-Udm	Polycrystalline	220	7.77*	64
86	Suntech Power	PLUTO285-Vdx	Polycrystalline	285	7.75*	63
87	Suntech Power	PLUTO190-Ade	Monocrystalline	190	7.75*	63
88	Suntech Power	STP245-20/Wde	Polycrystalline	245	7.74*	62
89	Suntech Power	STP245-20/Wd	Polycrystalline	245	7.74*	62
90	Suntech Power	PLUTO195-Adb	Monocrystalline	195	7.73*	62
91	Suntech Power	PLUTO195-Adf	Monocrystalline	195	7.73*	62
92	Suntech Power	PLUTO250-Wdm	Polycrystalline	250	7.72*	61
93	Suntech Power	PLUTO250-Wde	Polycrystalline	250	7.72*	61
94	Suntech Power	PLUTO250-Wdb	Polycrystalline	250	7.72*	61
95	Suntech Power	STP220-18/Ud	Polycrystalline	220	7.71*	60
96	Suntech Power	PLUTO290-Vdm	Polycrystalline	290	7.70*	60
97	Suntech Power	STP290-24/Ve	Polycrystalline	290	7.68*	59
98	Suntech Power	STP290-24/Vdx	Polycrystalline	290	7.68*	59
99	Suntech Power	STP290-VRM-1.5	Polycrystalline	290	7.68*	59
100	Suntech Power	STP290-24/Vd	Polycrystalline	290	7.68*	59
101	Suntech Power	STP290-VRM-1	Polycrystalline	290	7.68*	59
102	Suntech Power	STP290-24/Ver	Polycrystalline	290	7.68*	59
103	Suntech Power	PLUTO190-Ada	Monocrystalline	190	7.66*	57
104	Suntech Power	STP190S-24/Adb+	Monocrystalline	190	7.65*	57
105	Suntech Power	STP190S-24/Adb	Monocrystalline	190	7.65*	57
106	Suntech Power	STP240S-20/Wd	Monocrystalline	240	7.63*	56
107	Suntech Power	STP240S-20/Wde	Monocrystalline	240	7.63*	56
108	Suntech Power	STP240S-20/Wdb	Monocrystalline	240	7.63*	56
109	Suntech Power	STP190S-24/Ad	Monocrystalline	190	7.62*	55
110	Suntech Power	STP190S-24/Ad+	Monocrystalline	190	7.62*	55
111	Suntech Power	PLUTO280-Vdx	Polycrystalline	280	7.62*	55
112	Suntech Power	PLUTO215-Udm	Polycrystalline	215	7.59*	53
113	Suntech Power	PLUTO190-Adb	Monocrystalline	190	7.58*	52
114	Suntech Power	PLUTO190-Adf	Monocrystalline	190	7.58*	53
115	Suntech Power	PLUTO245-Wde	Polycrystalline	245	7.57*	52
116	Suntech Power	PLUTO245-Wdm	Polycrystalline	245	7.57*	52
117	Suntech Power	PLUTO285-Vdm	Polycrystalline	285	7.57*	52
118	Suntech Power	PLUTO245-Wdb	Polycrystalline	245	7.56*	52
119	Suntech Power	STP215-18/Ud	Polycrystalline	215	7.54*	50
120	Suntech Power	STP285-24/Vd	Polycrystalline	285	7.53*	50
121	Suntech Power	STP285-24/Vdx	Polycrystalline	285	7.53*	50
122	Suntech Power	STP285-24/Ve	Polycrystalline	285	7.53*	50
123	Suntech Power	STP285-24/Ver	Polycrystalline	285	7.53*	50
124	Suntech Power	STP285-VRM-1	Polycrystalline	285	7.53*	50
125	Suntech Power	STP285-VRM-1.5	Polycrystalline	285	7.53*	50
126	Suntech Power	STP240-20/Wde	Polycrystalline	240	7.49*	47
127	Suntech Power	STP240-20/Wd	Polycrystalline	240	7.49*	47
128	Suntech Power	STP240-20/Wdl	Polycrystalline	240	7.48*	47
129	Suntech Power	STP235S-20/Wdb	Monocrystalline	235	7.47*	46
130	Suntech Power	STP235S-20/Wd	Monocrystalline	235	7.47*	46
131	Suntech Power	STP235S-20/Wde	Monocrystalline	235	7.47*	46
132	Suntech Power	STP185S-24/Adb	Monocrystalline	185	7.45*	45
133	Suntech Power	STP185S-24/Adb+	Monocrystalline	185	7.45*	45
134	Suntech Power	PLUTO280-Vdm	Polycrystalline	280	7.45*	45
135	Suntech Power	STP210-18/Ud	Polycrystalline	210	7.44*	45
136	Suntech Power	STP210-18/UB-1	Polycrystalline	210	7.44*	45
137	Suntech Power	PLUTO210-Udm	Polycrystalline	210	7.42*	43
138	Suntech Power	STP280-VRM-1.5	Polycrystalline	280	7.41*	42
139	Suntech Power	STP280-24/Ve	Polycrystalline	280	7.41*	42
140	Suntech Power	STP280-24/Vdx	Polycrystalline	280	7.41*	42
141	Suntech Power	STP280-24/Vd	Polycrystalline	280	7.41*	42
142	Suntech Power	STP280-24/Vb-1	Polycrystalline	280	7.41*	42
143	Suntech Power	STP280-VRM-1	Polycrystalline	280	7.41*	42
144	Suntech Power	PLUTO240-Wdm	Polycrystalline	240	7.41*	42
145	Suntech Power	PLUTO240-Wde	Polycrystalline	240	7.41*	42
146	Suntech Power	PLUTO240-Wdb	Polycrystalline	240	7.41*	42
147	Suntech Power	STP185S-24/Ab-1	Monocrystalline	185	7.39*	41
148	Suntech Power	STP185S-24/Ad+	Monocrystalline	185	7.39*	41
149	Suntech Power	STP235-20/Wdl	Polycrystalline	235	7.35*	39
150	Suntech Power	STP275-VRM-1	Polycrystalline	275	7.35*	39
151	Suntech Power	STP275-24/Ve	Polycrystalline	275	7.35*	39
152	Suntech Power	STP275-24/Vdx	Polycrystalline	275	7.35*	39
153	Suntech Power	STP275-24/Vd	Polycrystalline	275	7.35*	39
154	Suntech Power	STP275-VRM-1.5	Polycrystalline	275	7.35*	39
155	Suntech Power	STP235-20/Wde	Polycrystalline	235	7.34*	38
156	Suntech Power	STP235-20/Wd	Polycrystalline	235	7.34*	38
157	Suntech Power	STP230S-20/Wd	Monocrystalline	230	7.31*	36
158	Suntech Power	STP230S-20/Wdb	Monocrystalline	230	7.31*	36
159	Suntech Power	STP230S-20/Wde	Monocrystalline	230	7.31*	36
160	Suntech Power	PLUTO235-Wdm	Polycrystalline	235	7.28*	35
161	Suntech Power	PLUTO235-Wde	Polycrystalline	235	7.28*	35
162	Suntech Power	PLUTO235-Wdb	Polycrystalline	235	7.28*	34
163	Suntech Power	STP180S-24/Adb+	Monocrystalline	180	7.22*	31
164	Suntech Power	STP180S-24/Ab-1 Black	Monocrystalline	180	7.22*	31
165	Suntech Power	MSZ180J-F	Monocrystalline	180	7.22*	31
166	Suntech Power	MSZ180B-F	Monocrystalline	180	7.22*	31
167	Suntech Power	STP205-18/Ud	Polycrystalline	205	7.22*	32
168	Suntech Power	STP270-VRM-1	Polycrystalline	270	7.21*	31
169	Suntech Power	STP270-24/Vb-1	Polycrystalline	270	7.21*	31
170	Suntech Power	STP270-24/Vdx	Polycrystalline	270	7.21*	31
171	Suntech Power	STP270-24/Ve	Polycrystalline	270	7.21*	31
172	Suntech Power	STP270-24/Vd	Polycrystalline	270	7.21*	31
173	Suntech Power	STP230-20/Wd	Polycrystalline	230	7.17*	28
174	Suntech Power	STP230-20/Wde	Polycrystalline	230	7.17*	28
175	Suntech Power	STP230-20/Wdl	Polycrystalline	230	7.17*	29
176	Suntech Power	STP180S-24/Ab-1	Monocrystalline	180	7.17*	29
177	Suntech Power	STP180S-24/Ad+	Monocrystalline	180	7.17*	29
178	Suntech Power	PLUTO230-Wdb	Polycrystalline	230	7.11*	26
179	Suntech Power	PLUTO230-Wdm	Polycrystalline	230	7.11*	26
180	Suntech Power	PLUTO230-Wde	Polycrystalline	230	7.11*	26
181	Suntech Power	STP200-18/UB-1	Polycrystalline	200	7.04*	23
182	Suntech Power	STP200-18/Ud	Polycrystalline	200	7.04*	23
183	Suntech Power	STP225-20/Wde	Polycrystalline	225	7.03*	22
184	Suntech Power	STP225-20/Wd	Polycrystalline	225	7.03*	22
185	Suntech Power	STP225-20/Wdl	Polycrystalline	225	7.03*	22
186	Suntech Power	MSZ175B-F	Monocrystalline	175	6.99*	21
187	Suntech Power	STP175S-24/Ab-1 Black	Monocrystalline	175	6.99*	21
188	Suntech Power	STP175S-24/Adb+	Monocrystalline	175	6.99*	21
189	Suntech Power	MSZ175J-F	Monocrystalline	175	6.99*	21
190	Suntech Power	STP175S-24/Ad+	Monocrystalline	175	6.95*	19
191	Suntech Power	STP175S-24/Ab-1	Monocrystalline	175	6.95*	19
192	Suntech Power	STP260-VRM-1	Polycrystalline	260	6.94*	19
193	Suntech Power	STP260-24/Vb-1	Polycrystalline	260	6.94*	19
194	Suntech Power	STP260-24/Vd	Polycrystalline	260	6.94*	19
195	Suntech Power	STP260-24/Ve	Polycrystalline	260	6.94*	19
196	Suntech Power	STP220-20/Wdl	Polycrystalline	220	6.87*	17
197	Suntech Power	STP220-20/Wde	Polycrystalline	220	6.86*	16
198	Suntech Power	STP220-20/Wd	Polycrystalline	220	6.86*	16
199	Suntech Power	STP170S-24/Adb+	Monocrystalline	170	6.82*	15
200	Suntech Power	STP170S-24/Ab-1 Black	Monocrystalline	170	6.82*	15
201	Suntech Power	STP270D-24/VEC	Polycrystalline	270	6.80*	14
202	Suntech Power	STP170S-24/Ab-1	Monocrystalline	170	6.78*	13
203	Suntech Power	STP170S-24/Ad+	Monocrystalline	170	6.78*	13
204	Suntech Power	STP215-20/Wd	Polycrystalline	215	6.71*	12
205	Suntech Power	STP215-20/Wde	Polycrystalline	215	6.71*	12
206	Suntech Power	STP190-18/UB-1	Polycrystalline	190	6.69*	11
207	Suntech Power	STP210-20/Wde	Polycrystalline	210	6.56*	9
208	Suntech Power	STP210-20/Wd	Polycrystalline	210	6.56*	9
209	Suntech Power	STP260D-24/VEC	Polycrystalline	260	6.55*	8
210	Suntech Power	STP250D-24/VEC	Polycrystalline	250	6.34*	6
211	Suntech Power	STP050D-5/ZCB	Polycrystalline	50	6.26*	5
212	Suntech Power	STP050D-5/ZCF	Polycrystalline	50	6.26*	5
213	Suntech Power	STP050D-5/ZCG	Polycrystalline	50	6.26*	5
214	Suntech Power	STP165S-24/Ab-1 Black	Monocrystalline	165	6.19*	4
215	Suntech Power	STP160S-24/Ab-1 Black	Monocrystalline	160	6.00*	3
216	Suntech Power	STP135D-12/VEC	Polycrystalline	135	3.49*	0
217	Suntech Power	STP130D-12/VEC	Polycrystalline	130	3.36*	0
218	Suntech Power	STP120D-12/VEC	Polycrystalline	120	3.14*	0

---

* 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.