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 LDK Solar

Here are the PSI Ratings for modules from LDK 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	LDK Solar	LDK260PAFW	Polycrystalline	260	8.23*	84
2	LDK Solar	LDK260PAFB	Polycrystalline	260	8.23*	84
3	LDK Solar	LDK260PABW	Polycrystalline	260	8.14*	81
4	LDK Solar	LDK260PABB	Polycrystalline	260	8.14*	81
5	LDK Solar	LDK255PAFW	Polycrystalline	255	8.05*	77
6	LDK Solar	LDK255PAFB	Polycrystalline	255	8.05*	78
7	LDK Solar	LDK-200D-24(S)	Monocrystalline	200	8.02*	76
8	LDK Solar	LDK255PABB	Polycrystalline	255	7.98*	74
9	LDK Solar	LDK255PABW	Polycrystalline	255	7.98*	74
10	LDK Solar	LDK250PAFW	Polycrystalline	250	7.90*	71
11	LDK Solar	LDK250PAFB	Polycrystalline	250	7.90*	71
12	LDK Solar	LDK-255D-20	Monocrystalline	255	7.90*	71
13	LDK Solar	LDK-255P-20	Polycrystalline	255	7.89*	70
14	LDK Solar	LDK250PABB	Polycrystalline	250	7.83*	67
15	LDK Solar	LDK250PABW	Polycrystalline	250	7.83*	67
16	LDK Solar	LDK-195D-24(S)	Monocrystalline	195	7.80*	66
17	LDK Solar	LDK-250P-20	Polycrystalline	250	7.75*	63
18	LDK Solar	LDK245PAFB	Polycrystalline	245	7.74*	62
19	LDK Solar	LDK245PAFW	Polycrystalline	245	7.74*	62
20	LDK Solar	LDK-250D-20	Monocrystalline	250	7.72*	61
21	LDK Solar	LDK245PABB	Polycrystalline	245	7.66*	58
22	LDK Solar	LDK245PABW	Polycrystalline	245	7.66*	58
23	LDK Solar	LDK-295P-24	Polycrystalline	295	7.65*	57
24	LDK Solar	LDK-190D-24(S)	Monocrystalline	190	7.62*	55
25	LDK Solar	LDK-190P-24(S)	Polycrystalline	190	7.59*	53
26	LDK Solar	LDK-245P-20	Polycrystalline	245	7.59*	53
27	LDK Solar	LDK-245D-20	Monocrystalline	245	7.57*	52
28	LDK Solar	LDK-240P-20	Polycrystalline	240	7.56*	52
29	LDK Solar	LDK-290P-24	Polycrystalline	290	7.52*	49
30	LDK Solar	LDK-240D-20	Monocrystalline	240	7.41*	42
31	LDK Solar	LDK-185P-24(S)	Polycrystalline	185	7.40*	41
32	LDK Solar	LDK-235P-20	Polycrystalline	235	7.39*	41
33	LDK Solar	LDK-285P-24	Polycrystalline	285	7.38*	41
34	LDK Solar	LDK-235D-20	Monocrystalline	235	7.27*	34
35	LDK Solar	LDK-280P-24	Polycrystalline	280	7.26*	34
36	LDK Solar	LDK-230P-20	Polycrystalline	230	7.24*	33
37	LDK Solar	LDK-180P-24(S)	Polycrystalline	180	7.19*	30
38	LDK Solar	LDK-210P-18	Polycrystalline	210	7.16*	28
39	LDK Solar	LDK-275P-24	Polycrystalline	275	7.11*	26
40	LDK Solar	LDK-230D-20	Monocrystalline	230	7.11*	26
41	LDK Solar	LDK-225P-20	Polycrystalline	225	7.08*	25
42	LDK Solar	LDK-270P-24	Polycrystalline	270	6.95*	19
43	LDK Solar	LDK-200P-18	Polycrystalline	200	6.83*	15
44	LDK Solar	LDK-220P-20	Polycrystalline	220	6.77*	13
45	LDK Solar	LDK-180D-24	Monocrystalline	180	6.77*	13
46	LDK Solar	LDK-260P-24	Polycrystalline	260	6.68*	11
47	LDK Solar	LDK-220D-20	Monocrystalline	220	6.64*	10
48	LDK Solar	LDK-175D-24	Monocrystalline	175	6.56*	9
49	LDK Solar	LDK-190P-18	Polycrystalline	190	6.48*	7
50	LDK Solar	LDK-210P-20	Polycrystalline	210	6.45*	7
51	LDK Solar	LDK-170D-24	Monocrystalline	170	6.33*	5

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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.