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 Helios Energy Europe

Here are the PSI Ratings for modules from Helios Energy Europe, 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	Helios Energy Europe	60M290	Monocrystalline	290	9.57*	98
2	Helios Energy Europe	72M345	Monocrystalline	345	9.46*	98
3	Helios Energy Europe	60M285	Monocrystalline	285	9.44*	98
4	Helios Energy Europe	72M340	Monocrystalline	340	9.32*	98
5	Helios Energy Europe	60M280	Monocrystalline	280	9.28*	97
6	Helios Energy Europe	72M335	Monocrystalline	335	9.18*	97
7	Helios Energy Europe	60M275	Monocrystalline	275	9.11*	97
8	Helios Energy Europe	72M330	Monocrystalline	330	9.06*	97
9	Helios Energy Europe	60M270	Monocrystalline	270	8.95*	96
10	Helios Energy Europe	72M325	Monocrystalline	325	8.92*	96
11	Helios Energy Europe	72P320	Polycrystalline	320	8.85*	95
12	Helios Energy Europe	72M320	Monocrystalline	320	8.79*	95
13	Helios Energy Europe	72P315	Polycrystalline	315	8.67*	94
14	Helios Energy Europe	72M315	Monocrystalline	315	8.64*	93
15	Helios Energy Europe	72P310	Polycrystalline	310	8.54*	92
16	Helios Energy Europe	72P305	Polycrystalline	305	8.39*	89
17	Helios Energy Europe	72P290	Polycrystalline	290	8.36*	88
18	Helios Energy Europe	72P300	Polycrystalline	300	8.25*	85
19	Helios Energy Europe	72P285	Polycrystalline	285	8.25*	85
20	Helios Energy Europe	96M420	Monocrystalline	420	8.23*	84
21	Helios Energy Europe	96M415	Monocrystalline	415	8.13*	81
22	Helios Energy Europe	96M410	Monocrystalline	410	8.03*	77
23	Helios Energy Europe	60M265	Monocrystalline	265	7.97*	74
24	Helios Energy Europe	96M405	Monocrystalline	405	7.94*	72
25	Helios Energy Europe	60M260	Monocrystalline	260	7.93*	72
26	Helios Energy Europe	72M310	Monocrystalline	310	7.89*	70
27	Helios Energy Europe	60P255	Polycrystalline	255	7.84*	68
28	Helios Energy Europe	96M400	Monocrystalline	400	7.84*	68
29	Helios Energy Europe	HEE300MA78	Monocrystalline	300	7.79*	65
30	Helios Energy Europe	72M305	Monocrystalline	305	7.77*	64
31	Helios Energy Europe	60M255	Monocrystalline	255	7.77*	64
32	Helios Energy Europe	96M395	Monocrystalline	395	7.74*	62
33	Helios Energy Europe	60P250	Polycrystalline	250	7.72*	61
34	Helios Energy Europe	HEE300MA77	Monocrystalline	295	7.67*	58
35	Helios Energy Europe	96M390	Monocrystalline	390	7.64*	56
36	Helios Energy Europe	HEE215MA68	Monocrystalline	250	7.62*	55
37	Helios Energy Europe	HEE215M	Monocrystalline	240	7.60*	54
38	Helios Energy Europe	60M250	Monocrystalline	250	7.59*	54
39	Helios Energy Europe	60P245	Polycrystalline	245	7.57*	52
40	Helios Energy Europe	HEE300MA76	Monocrystalline	290	7.54*	50
41	Helios Energy Europe	HEE300M	Monocrystalline	290	7.54*	50
42	Helios Energy Europe	HEE215MA67	Monocrystalline	245	7.52*	49
43	Helios Energy Europe	HEE300MA75	Monocrystalline	285	7.42*	42
44	Helios Energy Europe	60P240	Polycrystalline	240	7.42*	43
45	Helios Energy Europe	HEE215MA66	Monocrystalline	240	7.35*	39
46	Helios Energy Europe	HEE300MA74	Monocrystalline	280	7.28*	35
47	Helios Energy Europe	HEE215MA65	Monocrystalline	235	7.19*	30
48	Helios Energy Europe	HEE275AU75	Polycrystalline	275	7.11*	26
49	Helios Energy Europe	HEE275U	Polycrystalline	270	7.08*	24
50	Helios Energy Europe	HEE215MA64	Monocrystalline	230	7.04*	23
51	Helios Energy Europe	HEE210UA65	Polycrystalline	230	7.03*	22
52	Helios Energy Europe	HEE275AU74	Polycrystalline	270	6.97*	20
53	Helios Energy Europe	HEE210U	Polycrystalline	225	6.90*	17
54	Helios Energy Europe	HEE210UA64	Polycrystalline	225	6.90*	17
55	Helios Energy Europe	HEE275AU73	Polycrystalline	265	6.84*	16
56	Helios Energy Europe	HEE210UA63	Polycrystalline	220	6.78*	14
57	Helios Energy Europe	HEE275AU72	Polycrystalline	260	6.72*	12
58	Helios Energy Europe	HEE210UA62	Polycrystalline	215	6.64*	10

---

* 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.