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 TDG Holding

Here are the PSI Ratings for modules from TDG Holding, 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	TDG Holding	T305M726	Monocrystalline	305	6.80*	14
2	TDG Holding	T255M606	Monocrystalline	255	6.76*	13
3	TDG Holding	T200M725	Monocrystalline	200	6.73*	12
4	TDG Holding	T300M726	Monocrystalline	300	6.69*	11
5	TDG Holding	T250P606	Polycrystalline	250	6.65*	10
6	TDG Holding	T260M965	Monocrystalline	260	6.64*	10
7	TDG Holding	T250M606	Monocrystalline	250	6.63*	10
8	TDG Holding	T295P726	Polycrystalline	295	6.61*	9
9	TDG Holding	T295M726	Monocrystalline	295	6.58*	9
10	TDG Holding	T195M725	Monocrystalline	195	6.55*	8
11	TDG Holding	T245P606	Polycrystalline	245	6.51*	8
12	TDG Holding	T290P726	Polycrystalline	290	6.50*	7
13	TDG Holding	T255M965	Monocrystalline	255	6.50*	7
14	TDG Holding	T245M606	Monocrystalline	245	6.48*	7
15	TDG Holding	T290M726	Monocrystalline	290	6.47*	7
16	TDG Holding	T190M725	Monocrystalline	190	6.39*	6
17	TDG Holding	T285P726	Polycrystalline	285	6.39*	6
18	TDG Holding	T240P606	Polycrystalline	240	6.38*	6
19	TDG Holding	T250M965	Monocrystalline	250	6.38*	6
20	TDG Holding	T240M606	Monocrystalline	240	6.35*	6
21	TDG Holding	T285M726	Monocrystalline	285	6.35*	6
22	TDG Holding	T280P726	Polycrystalline	280	6.28*	5
23	TDG Holding	T280M726	Monocrystalline	280	6.26*	5
24	TDG Holding	T245M965	Monocrystalline	245	6.26*	5
25	TDG Holding	T235P606	Polycrystalline	235	6.24*	5
26	TDG Holding	T235M606	Monocrystalline	235	6.22*	4
27	TDG Holding	T185M725	Monocrystalline	185	6.22*	4
28	TDG Holding	T275P726	Polycrystalline	275	6.17*	4
29	TDG Holding	T275M726	Monocrystalline	275	6.16*	4
30	TDG Holding	T240M965	Monocrystalline	240	6.13*	4
31	TDG Holding	T230P606	Polycrystalline	230	6.12*	4
32	TDG Holding	T230M606	Monocrystalline	230	6.06*	3
33	TDG Holding	T270M726	Monocrystalline	270	6.05*	3
34	TDG Holding	T270P726	Polycrystalline	270	6.04*	3
35	TDG Holding	T180M725	Monocrystalline	180	6.04*	3
36	TDG Holding	T225P606	Polycrystalline	225	5.98*	3
37	TDG Holding	T235M965	Monocrystalline	235	5.98*	3
38	TDG Holding	T225M606	Monocrystalline	225	5.97*	3
39	TDG Holding	T265M726	Monocrystalline	265	5.94*	3
40	TDG Holding	T265P726	Polycrystalline	265	5.92*	3
41	TDG Holding	T175M725	Monocrystalline	175	5.88*	3
42	TDG Holding	T230M965	Monocrystalline	230	5.87*	3
43	TDG Holding	T220P606	Polycrystalline	220	5.85*	3
44	TDG Holding	T260P726	Polycrystalline	260	5.82*	3
45	TDG Holding	T260M726	Monocrystalline	260	5.82*	3
46	TDG Holding	T220M606	Monocrystalline	220	5.80*	3
47	TDG Holding	T225M965	Monocrystalline	225	5.74*	2
48	TDG Holding	T215P606	Polycrystalline	215	5.72*	2
49	TDG Holding	T255P726	Polycrystalline	255	5.71*	2
50	TDG Holding	T170M725	Monocrystalline	170	5.71*	2
51	TDG Holding	T255M726	Monocrystalline	255	5.71*	2
52	TDG Holding	T220M965	Monocrystalline	220	5.61*	2
53	TDG Holding	T210P606	Polycrystalline	210	5.59*	2
54	TDG Holding	T250P726	Polycrystalline	250	5.59*	2

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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.