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.

Subscribe to our email list

Before using the PSI Ratings, you should subscribe to our email list to receive important updates from the Principal Solar Institute.

PSI Ratings – PV Solar Modules from Prism Solar Technologies

Here are the PSI Ratings for modules from Prism Solar Technologies, 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	Prism Solar Technologies	Bi60S-356BSTC	Monocrystalline	280	9.13*	97
2	Prism Solar Technologies	Bi60S-349BSTC	Monocrystalline	275	8.94*	96
3	Prism Solar Technologies	Bi60-356BSTC	Monocrystalline	280	8.89*	96
4	Prism Solar Technologies	Bi60S-343BSTC	Monocrystalline	270	8.75*	94
5	Prism Solar Technologies	Bi60S-337BSTC	Monocrystalline	265	8.72*	94
6	Prism Solar Technologies	Bi60-349BSTC	Monocrystalline	275	8.70*	94
7	Prism Solar Technologies	Bi60-343BSTC	Monocrystalline	270	8.67*	94
8	Prism Solar Technologies	B265	Monocrystalline	265	8.63*	93
9	Prism Solar Technologies	Bi60S-330BSTC	Monocrystalline	260	8.51*	91
10	Prism Solar Technologies	Bi60-337BSTC	Monocrystalline	265	8.48*	91
11	Prism Solar Technologies	B260	Monocrystalline	260	8.48*	91
12	Prism Solar Technologies	Bi60-330BSTC	Monocrystalline	260	8.29*	86
13	Prism Solar Technologies	B 255	Monocrystalline	255	7.89*	70
14	Prism Solar Technologies	B 245	Monocrystalline	245	7.87*	69
15	Prism Solar Technologies	B 250	Monocrystalline	250	7.73*	62
16	Prism Solar Technologies	B 240	Monocrystalline	240	7.42*	42
17	Prism Solar Technologies	Bi48-286BSTC	Monocrystalline	225	7.11*	26
18	Prism Solar Technologies	B 235	Monocrystalline	235	7.08*	25
19	Prism Solar Technologies	Bi48-279BSTC	Monocrystalline	220	6.95*	19
20	Prism Solar Technologies	Bi48-273BSTC	Monocrystalline	215	6.79*	14
21	Prism Solar Technologies	Bi48-267BSTC	Monocrystalline	210	6.63*	10
22	Prism Solar Technologies	B 210	Monocrystalline	210	6.56*	9
23	Prism Solar Technologies	Bi48-260BSTC	Monocrystalline	205	6.47*	7
24	Prism Solar Technologies	B 155	Monocrystalline	155	6.45*	7
25	Prism Solar Technologies	B 165S	Monocrystalline	165	6.41*	6
26	Prism Solar Technologies	B 205	Monocrystalline	205	6.41*	6
27	Prism Solar Technologies	B 200	Monocrystalline	196	6.14*	4
28	Prism Solar Technologies	B 150	Monocrystalline	147	6.13*	4
29	Prism Solar Technologies	B 195	Monocrystalline	195	6.11*	4
30	Prism Solar Technologies	B 145	Monocrystalline	145	6.05*	3
31	Prism Solar Technologies	HB 180	Monocrystalline	177	5.82*	3

---

* 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.