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 Symphony Energy

Here are the PSI Ratings for modules from Symphony Energy, 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
1Symphony EnergySE-P259NA3Monocrystalline2598.19*83
2Symphony EnergyOS-P259NA3Monocrystalline2598.19*83
3Symphony EnergySE-P260NA3Monocrystalline2608.19*83
4Symphony EnergyOS-P260NA3Monocrystalline2608.19*83
5Symphony EnergyOS-P258NA3Monocrystalline2588.14*81
6Symphony EnergySE-P258NA3Monocrystalline2588.14*81
7Symphony EnergySE-P257NA3Monocrystalline2578.12*80
8Symphony EnergyOS-P257NA3Monocrystalline2578.12*80
9Symphony EnergyOS-P256NA3Monocrystalline2568.07*78
10Symphony EnergySE-P256NA3Monocrystalline2568.07*78
11Symphony EnergySE-S255NA3Monocrystalline2558.06*78
12Symphony EnergyOS-S255NA3Monocrystalline2558.06*78
13Symphony EnergyOS-P255NA3Monocrystalline2558.05*78
14Symphony EnergySE-P255NA3Monocrystalline2558.05*78
15Symphony EnergyOS-S254NA3Monocrystalline2548.03*77
16Symphony EnergySE-S254NA3Monocrystalline2548.03*77
17Symphony EnergySE-P254NA3Monocrystalline2548.02*76
18Symphony EnergyOS-P254NA3Monocrystalline2548.02*76
19Symphony EnergySE-S253NA3Monocrystalline2538.01*76
20Symphony EnergyOS-S253NA3Monocrystalline2538.01*76
21Symphony EnergySE-P253NA3Monocrystalline2537.99*75
22Symphony EnergyOS-P253NA3Monocrystalline2537.99*75
23Symphony EnergyOS-S252NA3Monocrystalline2527.96*73
24Symphony EnergySE-S252NA3Monocrystalline2527.96*73
25Symphony EnergySE-S251NA3Monocrystalline2517.95*73
26Symphony EnergyOS-S251NA3Monocrystalline2517.95*73
27Symphony EnergyOS-P251NA3Monocrystalline2517.94*72
28Symphony EnergySE-P251NA3Monocrystalline2517.94*72
29Symphony EnergySE-P252NA3Monocrystalline2527.94*73
30Symphony EnergyOS-P252NA3Monocrystalline2527.94*73
31Symphony EnergySE-S250NA3Monocrystalline2507.91*71
32Symphony EnergyOS-S250NA3Monocrystalline2507.91*71
33Symphony EnergyOS-P250NA3Monocrystalline2507.88*70
34Symphony EnergySE-P250NA3Monocrystalline2507.88*70
35Symphony EnergyOS-S249NA3Monocrystalline2497.87*69
36Symphony EnergySE-S249NA3Monocrystalline2497.87*69
37Symphony EnergyOS-P249NA3Monocrystalline2497.86*69
38Symphony EnergySE-P249NA3Monocrystalline2497.86*69
39Symphony EnergySE-S248NA3Monocrystalline2487.84*67
40Symphony EnergyOS-S248NA3Monocrystalline2487.84*67
41Symphony EnergyOS-M250NA3Polycrystalline2507.82*66
42Symphony EnergySE-M250NA3Polycrystalline2507.82*66
43Symphony EnergySE-S250TAMonocrystalline2507.82*67
44Symphony EnergyOS-S250TAMonocrystalline2507.82*66
45Symphony EnergySE-P248NA3Monocrystalline2487.82*67
46Symphony EnergyOS-P248NA3Monocrystalline2487.82*67
47Symphony EnergySE-S247NA3Monocrystalline2477.81*66
48Symphony EnergyOS-S247NA3Monocrystalline2477.81*66
49Symphony EnergySE-P247NA3Monocrystalline2477.80*65
50Symphony EnergyOS-P247NA3Monocrystalline2477.80*65
51Symphony EnergyOS-S249TAMonocrystalline2497.79*65
52Symphony EnergySE-S249TAMonocrystalline2497.79*65
53Symphony EnergySE-M249NA3Polycrystalline2497.79*65
54Symphony EnergyOS-M249NA3Polycrystalline2497.79*65
55Symphony EnergyOS-S246NA3Monocrystalline2467.77*64
56Symphony EnergySE-S246NA3Monocrystalline2467.77*64
57Symphony EnergyOS-S248TAMonocrystalline2487.76*63
58Symphony EnergySE-S248TAMonocrystalline2487.76*63
59Symphony EnergySE-P246NA3Monocrystalline2467.76*63
60Symphony EnergyOS-P246NA3Monocrystalline2467.76*63
61Symphony EnergyOS-M248NA3Polycrystalline2487.76*63
62Symphony EnergySE-M248NA3Polycrystalline2487.76*63
63Symphony EnergyOS-S245NA3Monocrystalline2457.74*62
64Symphony EnergySE-S245NA3Monocrystalline2457.74*62
65Symphony EnergySE-M247NA3Polycrystalline2477.73*62
66Symphony EnergyOS-M247NA3Polycrystalline2477.73*62
67Symphony EnergyOS-P245NA3Monocrystalline2457.73*62
68Symphony EnergySE-P245NA3Monocrystalline2457.73*62
69Symphony EnergyOS-S247TAMonocrystalline2477.72*61
70Symphony EnergySE-S247TAMonocrystalline2477.72*61
71Symphony EnergyOS-S244NA3Monocrystalline2447.71*60
72Symphony EnergySE-S244NA3Monocrystalline2447.71*60
73Symphony EnergySE-S246TAMonocrystalline2467.70*60
74Symphony EnergyOS-S246TAMonocrystalline2467.70*60
75Symphony EnergySE-M246NA3Polycrystalline2467.70*60
76Symphony EnergyOS-P244NA3Monocrystalline2447.70*60
77Symphony EnergySE-P244NA3Monocrystalline2447.70*60
78Symphony EnergyOS-M246NA3Polycrystalline2467.70*60
79Symphony EnergyOS-S243NA3Monocrystalline2437.69*59
80Symphony EnergySE-S243NA3Monocrystalline2437.69*59
81Symphony EnergyOS-P243NA3Monocrystalline2437.67*58
82Symphony EnergyOS-M245NA3Polycrystalline2457.67*58
83Symphony EnergySE-M245NA3Polycrystalline2457.67*58
84Symphony EnergySE-P243NA3Monocrystalline2437.67*58
85Symphony EnergyOS-S245TAMonocrystalline2457.66*57
86Symphony EnergySE-S245TAMonocrystalline2457.66*57
87Symphony EnergySE-S242NA3Monocrystalline2427.66*57
88Symphony EnergyOS-S242NA3Monocrystalline2427.66*57
89Symphony EnergyOS-M244NA3Polycrystalline2447.64*56
90Symphony EnergySE-P242NA3Monocrystalline2427.64*56
91Symphony EnergyOS-M245NAPolycrystalline2457.64*57
92Symphony EnergySE-M245NAPolycrystalline2457.64*57
93Symphony EnergyOS-P242NA3Monocrystalline2427.64*56
94Symphony EnergySE-M244NA3Polycrystalline2447.64*56
95Symphony EnergyOS-S244TAMonocrystalline2447.63*56
96Symphony EnergySE-S244TAMonocrystalline2447.63*56
97Symphony EnergyOS-S241NA3Monocrystalline2417.62*55
98Symphony EnergySE-S241NA3Monocrystalline2417.62*55
99Symphony EnergySE-M244NAPolycrystalline2447.61*55
100Symphony EnergyOS-M244NAPolycrystalline2447.61*55
101Symphony EnergySE-M243NA3Polycrystalline2437.60*54
102Symphony EnergyOS-M243NA3Polycrystalline2437.60*54
103Symphony EnergyOS-P241NA3Monocrystalline2417.60*54
104Symphony EnergySE-P241NA3Monocrystalline2417.60*54
105Symphony EnergyOS-S240NA3Monocrystalline2407.59*54
106Symphony EnergyOS-S243TAMonocrystalline2437.59*54
107Symphony EnergySE-S243TAMonocrystalline2437.59*54
108Symphony EnergySE-S240NA3Monocrystalline2407.59*54
109Symphony EnergySE-P240NA3Monocrystalline2407.58*52
110Symphony EnergySE-M243NAPolycrystalline2437.58*53
111Symphony EnergyOS-M243NAPolycrystalline2437.58*53
112Symphony EnergyOS-P240NA3Monocrystalline2407.57*52
113Symphony EnergyOS-M242NA3Polycrystalline2427.57*52
114Symphony EnergySE-M242NA3Polycrystalline2427.57*52
115Symphony EnergySE-S239NA3Monocrystalline2397.56*51
116Symphony EnergyOS-S239NA3Monocrystalline2397.56*51
117Symphony EnergySE-S242TAMonocrystalline2427.56*52
118Symphony EnergyOS-S242TAMonocrystalline2427.56*52
119Symphony EnergySE-M235GyPolycrystalline2357.56*52
120Symphony EnergySE-M242NAPolycrystalline2427.55*51
121Symphony EnergyOS-M242NAPolycrystalline2427.55*51
122Symphony EnergySE-P239NA3Monocrystalline2397.55*50
123Symphony EnergyOS-S241TAMonocrystalline2417.54*50
124Symphony EnergyOS-M241NA3Polycrystalline2417.54*50
125Symphony EnergySE-M241NA3Polycrystalline2417.54*50
126Symphony EnergySE-S241TAMonocrystalline2417.54*50
127Symphony EnergyOS-P239NA3Monocrystalline2397.54*50
128Symphony EnergyOS-M241NAPolycrystalline2417.53*49
129Symphony EnergySE-M241NAPolycrystalline2417.53*49
130Symphony EnergySE-S238NA3Monocrystalline2387.53*50
131Symphony EnergyOS-S238NA3Monocrystalline2387.53*50
132Symphony EnergyOS-P238NA3Monocrystalline2387.52*49
133Symphony EnergySE-P238NA3Monocrystalline2387.52*49
134Symphony EnergySE-M240NA3Polycrystalline2407.52*49
135Symphony EnergyOS-M240NA3Polycrystalline2407.52*49
136Symphony EnergySE-M234GyPolycrystalline2347.51*48
137Symphony EnergyOS-S240TAMonocrystalline2407.50*48
138Symphony EnergySE-S240TAMonocrystalline2407.50*48
139Symphony EnergyOS-M240NAPolycrystalline2407.49*48
140Symphony EnergySE-M240NAPolycrystalline2407.49*48
141Symphony EnergyOS-S237NA3Monocrystalline2377.49*47
142Symphony EnergySE-S237NA3Monocrystalline2377.49*47
143Symphony EnergyOS-M239NA3Polycrystalline2397.48*47
144Symphony EnergyOS-P237NA3Monocrystalline2377.48*47
145Symphony EnergyOS-S239TAMonocrystalline2397.48*46
146Symphony EnergySE-S239TAMonocrystalline2397.48*46
147Symphony EnergySE-M233GyPolycrystalline2337.48*47
148Symphony EnergySE-P237NA3Monocrystalline2377.48*47
149Symphony EnergySE-M239NA3Polycrystalline2397.48*47
150Symphony EnergySE-S236NA3Monocrystalline2367.47*46
151Symphony EnergyOS-S236NA3Monocrystalline2367.47*46
152Symphony EnergySE-P236NA3Monocrystalline2367.46*45
153Symphony EnergyOS-M239NAPolycrystalline2397.46*46
154Symphony EnergySE-M239NAPolycrystalline2397.46*46
155Symphony EnergyOS-M238NA3Polycrystalline2387.45*45
156Symphony EnergySE-M238NA3Polycrystalline2387.45*45
157Symphony EnergyOS-P236NA3Monocrystalline2367.45*45
158Symphony EnergyOS-S238TAMonocrystalline2387.44*44
159Symphony EnergySE-S238TAMonocrystalline2387.44*44
160Symphony EnergySE-M232GyPolycrystalline2327.44*44
161Symphony EnergyOS-S235NA3Monocrystalline2357.43*43
162Symphony EnergySE-S235NA3Monocrystalline2357.43*43
163Symphony EnergySE-M231GyPolycrystalline2317.42*43
164Symphony EnergySE-S237TAMonocrystalline2377.42*42
165Symphony EnergyOS-S237TAMonocrystalline2377.42*42
166Symphony EnergyOS-M237NA3Polycrystalline2377.42*42
167Symphony EnergySE-M237NA3Polycrystalline2377.42*42
168Symphony EnergyOS-M238NAPolycrystalline2387.42*43
169Symphony EnergySE-M238NAPolycrystalline2387.42*43
170Symphony EnergyOS-M237NAPolycrystalline2377.40*41
171Symphony EnergySE-M237NAPolycrystalline2377.40*41
172Symphony EnergySE-M230GyPolycrystalline2307.39*41
173Symphony EnergyOS-S236TAMonocrystalline2367.38*40
174Symphony EnergySE-S236TAMonocrystalline2367.38*40
175Symphony EnergyOS-M236NA3Polycrystalline2367.38*41
176Symphony EnergySE-M236NA3Polycrystalline2367.38*41
177Symphony EnergySE-M236NAPolycrystalline2367.37*39
178Symphony EnergyOS-M236NAPolycrystalline2367.37*39
179Symphony EnergySE-S235TAMonocrystalline2357.35*39
180Symphony EnergySE-M229GyPolycrystalline2297.35*39
181Symphony EnergyOS-M235NA3Polycrystalline2357.35*39
182Symphony EnergyOS-S235TAMonocrystalline2357.35*39
183Symphony EnergySE-M235NA3Polycrystalline2357.35*39
184Symphony EnergySE-M235NAPolycrystalline2357.33*38
185Symphony EnergyOS-M235NAPolycrystalline2357.33*38
186Symphony EnergyOS-S234TAMonocrystalline2347.32*37
187Symphony EnergySE-S234TAMonocrystalline2347.32*37
188Symphony EnergySE-M234NA3Polycrystalline2347.31*37
189Symphony EnergyOS-M234NA3Polycrystalline2347.31*37
190Symphony EnergySE-M228GyPolycrystalline2287.31*36
191Symphony EnergySE-M227GyPolycrystalline2277.30*36
192Symphony EnergySE-M234NAPolycrystalline2347.30*36
193Symphony EnergyOS-M234NAPolycrystalline2347.30*36
194Symphony EnergySE-M233NA3Polycrystalline2337.29*35
195Symphony EnergyOS-M233NA3Polycrystalline2337.29*35
196Symphony EnergyOS-S233TAMonocrystalline2337.28*35
197Symphony EnergySE-S233TAMonocrystalline2337.28*35
198Symphony EnergySE-S232TAMonocrystalline2327.26*34
199Symphony EnergyOS-S232TAMonocrystalline2327.26*34
200Symphony EnergySE-M233NAPolycrystalline2337.26*34
201Symphony EnergyOS-M233NAPolycrystalline2337.26*34
202Symphony EnergySE-M226GyPolycrystalline2267.26*34
203Symphony EnergySE-M232NA3Polycrystalline2327.26*34
204Symphony EnergyOS-M232NA3Polycrystalline2327.26*34
205Symphony EnergySE-M231NA3Polycrystalline2317.23*32
206Symphony EnergyOS-M231NA3Polycrystalline2317.23*32
207Symphony EnergyOS-M232NAPolycrystalline2327.23*32
208Symphony EnergySE-M232NAPolycrystalline2327.23*32
209Symphony EnergyOS-S231TAMonocrystalline2317.22*32
210Symphony EnergySE-S231TAMonocrystalline2317.22*32
211Symphony EnergySE-M225GyPolycrystalline2257.22*31
212Symphony EnergyOS-M231NAPolycrystalline2317.20*30
213Symphony EnergySE-M231NAPolycrystalline2317.20*30
214Symphony EnergySE-S230TAMonocrystalline2307.19*30
215Symphony EnergyOS-S230TAMonocrystalline2307.19*30
216Symphony EnergyOS-M230NA3Polycrystalline2307.19*30
217Symphony EnergySE-M230NA3Polycrystalline2307.19*30
218Symphony EnergySE-M224GyPolycrystalline2247.19*30
219Symphony EnergySE-M230NAPolycrystalline2307.17*29
220Symphony EnergyOS-M230NAPolycrystalline2307.17*29
221Symphony EnergySE-M223GyPolycrystalline2237.16*28
222Symphony EnergyOS-S229TAMonocrystalline2297.16*28
223Symphony EnergySE-S229TAMonocrystalline2297.16*28
224Symphony EnergySE-M229NAPolycrystalline2297.14*27
225Symphony EnergyOS-M229NAPolycrystalline2297.14*27
226Symphony EnergySE-M222GyPolycrystalline2227.13*27
227Symphony EnergySE-S228TAMonocrystalline2287.12*27
228Symphony EnergyOS-S228TAMonocrystalline2287.12*27
229Symphony EnergyOS-M228NAPolycrystalline2287.10*26
230Symphony EnergySE-M228NAPolycrystalline2287.10*25
231Symphony EnergySE-M221GyPolycrystalline2217.10*26
232Symphony EnergySE-M227NAPolycrystalline2277.08*25
233Symphony EnergyOS-M227NAPolycrystalline2277.08*25
234Symphony EnergySE-M220GyPolycrystalline2207.07*24
235Symphony EnergySE-M226NAPolycrystalline2267.05*24
236Symphony EnergyOS-M226NAPolycrystalline2267.05*24
237Symphony EnergySE-M219GyPolycrystalline2197.02*22
238Symphony EnergySE-M218GyPolycrystalline2187.01*22
239Symphony EnergyOS-M225NAPolycrystalline2257.01*22
240Symphony EnergySE-M225NAPolycrystalline2257.01*22
241Symphony EnergySE-M217GyPolycrystalline2176.98*20
242Symphony EnergySE-M216GyPolycrystalline2166.94*18
243Symphony EnergySE-M215GyPolycrystalline2156.91*18

* 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.