Mighty Mule MM371W
#3 in Single swingFull review
The mainstream DIY choice for a medium single driveway gate, with a real UL 325 listing. Buy the battery with it and check the length and weight chart first.
Amazon $344.06$344.06
3.2/5
A commercial grade, UL 325 listed single gate opener with a long warranty for buyers who value proven parts support over capacity per dollar.
- 400 lbGate weight
- 20 ftGate length
- Battery, solar readyPower
- 3 yearsWarranty
Check price at Amazon$1,395
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- UL 325 listed for every class from homes to industrial sites
- A three year warranty, the longest here
- Made in the USA, and the battery keeps it running through a power cut
Cons
- Around three times the price of DIY kits with similar weight ratings
- Rated for only 400 lb, less than most cheaper kits claim
- The battery is sold separately
How it scores
The rating comes from 5 measured or published factors, each scored 0-100 against fixed reference points for its gate type. How we rank explains each one.
Specifications
| Model number | 020320 |
|---|---|
| Gate | |
| Gate type | Single swing |
| Heaviest gate | 400 lb |
| Longest gate | 20 ft |
| Time to open | 16 s |
| UL 325 listed | Yes |
| Power | |
| Power | Battery, solar ready |
| Motor voltage | 12 V |
| Build | |
| Remotes included | 2 |
| Warranty | 3 years |
Alternatives in this gate type
TOPENS A8131
#4 in Single swingFull review
A low cost opener for a heavy single gate near an outlet. Pick a UL 325 listed kit instead where the gate faces a public road or children.
Amazon $359$359
Blütezeit MS600 Solar Swing
#6 in Single swingFull review
A tidy all in one solar kit for a heavy single gate away from power, with a longer warranty than most budget brands.
Amazon $569.99$569.99
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