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 Solarland USA

Here are the PSI Ratings for modules from Solarland USA, 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	Solarland USA	SLP200S-24H	Monocrystalline	200	7.94*	72
2	Solarland USA	SLP195S-24H	Monocrystalline	195	7.74*	63
3	Solarland USA	SLP190S-72	Monocrystalline	190	7.57*	52
4	Solarland USA	SLP240-18H	Polycrystalline	240	7.56*	51
5	Solarland USA	SLP190S-24H	Monocrystalline	190	7.54*	50
6	Solarland USA	SLP250S-96	Monocrystalline	250	7.48*	46
7	Solarland USA	SLP235-18H	Polycrystalline	235	7.40*	42
8	Solarland USA	SLP185S-72	Monocrystalline	185	7.38*	40
9	Solarland USA	SLP245S-96	Monocrystalline	245	7.34*	38
10	Solarland USA	SLP185S-24H	Monocrystalline	185	7.31*	36
11	Solarland USA	SLP235-60	Polycrystalline	235	7.28*	35
12	Solarland USA	SLP230-18H	Polycrystalline	230	7.25*	33
13	Solarland USA	SLP240S-96	Monocrystalline	240	7.19*	30
14	Solarland USA	SLP185S-24J	Monocrystalline	185	7.16*	28
15	Solarland USA	SLP230-60	Polycrystalline	230	7.13*	27
16	Solarland USA	SLP180S-24H	Monocrystalline	180	7.11*	26
17	Solarland USA	SLP180S-24J	Monocrystalline	180	6.99*	21
18	Solarland USA	SLP220-18H	Polycrystalline	220	6.97*	20
19	Solarland USA	SLP225-60	Polycrystalline	225	6.97*	20
20	Solarland USA	SLP175S-24H	Monocrystalline	175	6.91*	18
21	Solarland USA	SLP230S-96	Monocrystalline	230	6.88*	17
22	Solarland USA	SLP220-60	Polycrystalline	220	6.83*	15
23	Solarland USA	SLP215-18H	Polycrystalline	215	6.83*	15
24	Solarland USA	SLP175S-24J	Monocrystalline	175	6.76*	13
25	Solarland USA	SLP215-60	Polycrystalline	215	6.65*	10
26	Solarland USA	SLP210-18H	Polycrystalline	210	6.65*	10
27	Solarland USA	SLP170S-24H	Monocrystalline	170	6.62*	10
28	Solarland USA	SLP125S-17H	Monocrystalline	125	6.49*	7
29	Solarland USA	SLP205-18H	Polycrystalline	205	6.49*	7
30	Solarland USA	SLP165S-24H	Monocrystalline	165	6.44*	7
31	Solarland USA	SLP200-18H	Polycrystalline	200	6.34*	6
32	Solarland USA	SLP160S-24H	Monocrystalline	160	6.23*	5
33	Solarland USA	SLP120S-17H	Monocrystalline	120	6.21*	4
34	Solarland USA	SLP115S-17H	Monocrystalline	115	5.95*	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.