Door review
Add-A-Motor D20 Chicken Coop Door Opener Review
A mains-powered motor kit that lifts an existing vertical door by cord. It is not a complete door and needs an external timer or smart plug.
Quick answer
- Best retrofit motor: DIY retrofits with an existing slide door.
- Power: 120V AC, 19W.
- Controls: External timer or compatible switch required.
- Key fit detail: Lifts up to 10 lb; opens 25 in or more.
Editorial verdict
Useful for custom carpentry and large openings, but it is a component system rather than a ready-to-mount automatic door.
Strong points
- Works with custom door sizes and materials
- Ten-pound lift capacity
- Straightforward mechanical retrofit
Tradeoffs
- Door and timer are not included
- Requires protected mains power at the coop
Specification sheet
- Power
- 120V AC, 60Hz, 19W
- Lift capacity
- Up to 10 lb
- Opening travel
- 25 in or more
- Door included
- No
- Warranty
- 1 year listed
- Weather note
- Motor should be mounted in a protected location
- Verified
- July 18, 2026
Installation, safety, and buying limits
- Installation and size
- Provide the panel, guides, and timer. The maker lists a 10 lb lift limit and 25 in or more of travel.
- Obstruction safety
- Adjustable travel stops are not proof of bird detection. Confirm obstruction behavior for the complete build.
- Cold weather
- Protect the motor and power supply from weather. No verified operating-temperature range is available here.
- Warranty
- The manufacturer lists a one-year parts warranty.
- Choose another option if
- You need a complete door or have no protected power supply at the coop.
What the Add-A-Motor D20 kit includes
The D20 is a retrofit motor for an existing sliding chicken coop door, rather than a complete door. The manufacturer lists a motor, mounting hardware, universal door connector, AC power adapter, and instructions. You supply the panel, guides, and external timer. Confirm that the retail bundle includes those parts.
External timer and setup checks
Add-A-Motor recommends a lamp timer and warns against dusk-to-dawn timers, which can trigger incorrectly and leave birds outside. Choose a schedule after observing when your flock returns. A timer with clock backup preserves settings during an outage; that backup does not power the motor.
Before ordering, check panel weight, free travel, a secure closed position, and protected power at the coop. Include the missing parts in your whole-system DIY budget, then use the door installation checklist before supervising the first cycles.
Before you rely on it
Read the current manual, inventory every included part, and complete the manufacturer setup sequence. Observe repeated cycles or feeding/recording events as appropriate before leaving the system unattended.
Write down the manual override or fallback, label compatible replacement power or hardware, and show another caregiver how to recover from a failure. Automation is most useful when the backup is boring and obvious.
Open the manufacturer or primary product source to check the latest manual and compatibility details.
Sources checked
Review content updated October 6, 2026. The specification sheet retains its source-check date; controller revisions and retail bundles may differ. No hands-on test results are claimed.
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