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 is the better solar attic fan overall, rated 3.6 to 3.2. The VEVOR 42W Solar Attic Fan leads on features. The VEVOR 42W Solar Attic Fan costs $63 less ($236.90 vs $299.90).
OmniPV OP-SAF-40 Hybrid Solar Attic Fan
#8 in Roof mountFull review
A hybrid roof fan with a thermostat for a medium attic at a fair price. The newer 50 W model is the better buy if the price gap stays small.
Amazon $299.90$299.90
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.
Which should you buy?
- Choose the VEVOR 42W Solar Attic Fan for features (thermostat, AC backup, separate or tilting panel vs thermostat, AC backup).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every roof mount solar attic fan; a clear win is highlighted. How we rank explains each one.
| Factor weight | VEVOR 42W Solar Attic Fan | OmniPV OP-SAF-40 Hybrid Solar Attic Fan |
|---|---|---|
| Overall rating | 3.6/5 | 3.2/5 |
| Value 25% | 87 $0.13 per CFM ($236.90, 1,890 CFM credited of 2,800 claimed (45 per panel watt)) | 72 $0.17 per CFM ($299.90, 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-SAF-40 Hybrid Solar Attic Fan | |
|---|---|---|
| Airflow | ||
| Mount | Roof | Roof |
| 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 | 17.2 lb |