Mighty Mule MM571W

Last updated: November 2, 2026

Mighty Mule MM571W
3.6/5#1 of 8 in single swing gate openers
3.6

A heavy duty single gate kit for long or heavy farm and estate gates that wants a UL 325 listing. Check the length and weight chart for gates over 8 ft.

  • 850 lbGate weight
  • 18 ftGate length
  • Battery, solar readyPower
  • 1.5 yearsWarranty
Check price at Amazon$443.04

Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.

Pros
  • Rated for heavy single gates up to 850 lb or 18 ft long
  • UL 325 listed, with stop and reverse on contact
  • Opens in about 14 seconds
  • An 18 month warranty, longer than the lighter Mighty Mule models
Cons
  • The 850 lb rating is for an 8 ft gate; at 18 ft the limit is 350 lb
  • Phone control needs the MMS100 kit, sold separately
  • Not for solid surface gates

The Mighty Mule MM57X family

Every Mighty Mule MM57X model we rank, smallest first. Ratings compare each against its own gate type.

ModelGate weightRatingPrice
Mighty Mule MM571W (this one)850 lb3.6/5$443.04
Mighty Mule MM572W850 lb3.5/5$765.99

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 numberMM571W
Gate
Gate typeSingle swing
Heaviest gate850 lb
Longest gate18 ft
Time to open14 s
UL 325 listedYes
Power
PowerBattery, solar ready
Battery7 Ah
Motor voltage12 V
Build
Remotes included1
Weight30 lb
Warranty1.5 years

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