VEVOR 42W Solar Attic Fan
#4 in Roof mountFull review
A cheap, feature rich hybrid fan for a buyer who will accept an unproven airflow claim and no stated warranty.
Amazon $236.90$236.90
The VEVOR 42W Solar Attic Fan rates 3.6 among roof mount solar attic fans; the OmniPV OP-SWF-40 Solar Gable Fan rates 3.3 among gable mount ones. The VEVOR 42W Solar Attic Fan costs $32.09 less ($236.90 vs $268.99).
OmniPV OP-SWF-40 Solar Gable Fan
#2 in Gable mountFull review
A hybrid gable fan with a strong airflow claim at a mid range price, for a buyer who can live without a stated warranty.
Amazon $268.99$268.99
Prices were last checked November 2, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Scores side by side
These two sit in different mount classes (roof mount and gable mount), and each is scored against the reference points for its own class, so a rating says how well each does among its own mount peers. How we rank explains each factor.
| Factor weight | VEVOR 42W Solar Attic Fan | OmniPV OP-SWF-40 Solar Gable Fan |
|---|---|---|
| Overall rating | 3.6/5 | 3.3/5 |
| Value 25% | 87 $0.13 per CFM ($236.90, 1,890 CFM credited of 2,800 claimed (45 per panel watt)) | 78 $0.15 per CFM ($268.99, 1,800 CFM credited of 2,100 claimed (45 per panel watt)) |
| Airflow 15% | 68 1,890 CFM credited of 2,800 claimed (45 per panel watt) | 63 1,800 CFM credited of 2,100 claimed (45 per panel watt) |
| Panel 20% | 64 42 W panel | 60 40 W panel |
| Features 15% | 100 thermostat, AC backup, separate or tilting panel | 70 thermostat, AC backup |
| Warranty 25% | 0 warranty not published, scored as none | 0 warranty not published, scored as none |
Specifications
| VEVOR 42W Solar Attic Fan | OmniPV OP-SWF-40 Solar Gable Fan | |
|---|---|---|
| Airflow | ||
| Mount | Roof | Gable |
| Airflow | 2,800 CFM | 2,100 CFM |
| Motor | brushless DC | brushless DC |
| Power | ||
| Panel | 42 W | 40 W |
| Separate or tilting panel | Yes | - |
| Thermostat | Yes | Yes |
| AC backup | Yes | Yes |
| Build | ||
| Weight | 17.9 lb | 12 lb |