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 Ningbo Qixin Solar Electrical Appliance

Here are the PSI Ratings for modules from Ningbo Qixin Solar Electrical Appliance, 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	Ningbo Qixin Solar Electrical Appliance	SL235UL-30P	Polycrystalline	235	7.37*	39
2	Ningbo Qixin Solar Electrical Appliance	SL250UL-48M	Monocrystalline	250	7.32*	37
3	Ningbo Qixin Solar Electrical Appliance	SL185UL-36M	Monocrystalline	185	7.29*	35
4	Ningbo Qixin Solar Electrical Appliance	SL230UL-30P	Polycrystalline	230	7.21*	31
5	Ningbo Qixin Solar Electrical Appliance	SL280UL-36M	Monocrystalline	280	7.19*	30
6	Ningbo Qixin Solar Electrical Appliance	SL245UL-48M	Monocrystalline	245	7.17*	29
7	Ningbo Qixin Solar Electrical Appliance	SL275UL-36M	Monocrystalline	275	7.07*	24
8	Ningbo Qixin Solar Electrical Appliance	SL225UL-30P	Polycrystalline	225	7.06*	24
9	Ningbo Qixin Solar Electrical Appliance	SL240UL-48M	Monocrystalline	240	7.02*	22
10	Ningbo Qixin Solar Electrical Appliance	SL180UL-36M	Monocrystalline	180	6.99*	21
11	Ningbo Qixin Solar Electrical Appliance	SL270UL-36M	Monocrystalline	270	6.90*	17
12	Ningbo Qixin Solar Electrical Appliance	SL220UL-30P	Polycrystalline	220	6.88*	17
13	Ningbo Qixin Solar Electrical Appliance	SL235UL-48M	Monocrystalline	235	6.83*	15
14	Ningbo Qixin Solar Electrical Appliance	SL265UL-36M	Monocrystalline	265	6.77*	13
15	Ningbo Qixin Solar Electrical Appliance	SL215UL-30P	Polycrystalline	215	6.72*	12
16	Ningbo Qixin Solar Electrical Appliance	SL230UL-48M	Monocrystalline	230	6.68*	11
17	Ningbo Qixin Solar Electrical Appliance	SL260UL-36M	Monocrystalline	260	6.64*	10
18	Ningbo Qixin Solar Electrical Appliance	SL170UL-36M	Monocrystalline	170	6.62*	10
19	Ningbo Qixin Solar Electrical Appliance	SL210UL-30P	Polycrystalline	210	6.56*	9
20	Ningbo Qixin Solar Electrical Appliance	SL225UL-48M	Monocrystalline	225	6.54*	8
21	Ningbo Qixin Solar Electrical Appliance	SL255UL-36M	Monocrystalline	255	6.51*	8
22	Ningbo Qixin Solar Electrical Appliance	SL165UL-36M	Monocrystalline	165	6.44*	7
23	Ningbo Qixin Solar Electrical Appliance	SL220UL-48M	Monocrystalline	220	6.39*	6
24	Ningbo Qixin Solar Electrical Appliance	SL250UL-36M	Monocrystalline	250	6.38*	6
25	Ningbo Qixin Solar Electrical Appliance	SL160UL-36M	Monocrystalline	160	6.23*	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.