How many watts does a garage door opener use, and how long will a battery run it?
Garage door openers draw about 300–800 W while running and up to 1,800 W for a moment as it starts. They run for seconds or minutes at a time, so a 1 kWh power station gives about 64 minutes of running time at the higher figure. The station’s output must be above the running watts; that is what rules most small units out.
That is the middle of our range for this appliance. Yours may use less or a lot more: the range, the assumptions and every unit we track are below. Hours are hours of use on one full charge, counting about 85% of the battery as usable.
Hours of use by battery size
| Battery (nameplate) | Typical | Hard-working unit | Efficient unit |
|---|---|---|---|
| 500 Wh | about 274 h | 53 h | 1,417 h |
| 1,000 Wh | about 549 h | 106 h | 2,833 h |
| 2,000 Wh | about 1,097 h | 212 h | 5,667 h |
| 3,000 Wh | about 1,646 h | 319 h | 8,500 h |
| 5,000 Wh | about 2,743 h | 531 h | 14,167 h |
Hours = 85% of the nameplate battery divided by average watts. Typical uses about 2 W; hard-working 800 W on 1% of the time; efficient 300 W on 0% of the time. The station must also start it: see which units can, below.
How much battery a typical one needs
| Outage | Battery needed, typical |
|---|---|
| 12 hours | about 22 Wh |
| 24 hours | about 44 Wh |
| 3 days | about 130 Wh |
Nameplate watt-hours, so the 85% usable share is already counted. Past a day, most plans add solar or a generator rather than a bigger battery.
The range behind that
A garage door opener uses about 300–800 watts while running , and needs up to 1,800 watts for a split second when it starts. Over 24 hours it uses roughly 7–192 watt-hours.
Buy for the higher number in each range. 65 of the 73 products we track can run it. For example, the Zendure SuperBase V6400 gives about 7 hours of running time at full power.
This one is not plug-and-play. It is wired into your house, so you need a licensed electrician.
The numbers behind that
The opener runs for seconds per cycle, so its energy contribution is close to nothing. It appears here for the starting surge, not the energy.
What it draws while it is actually on.
The momentary surge when a motor or compressor kicks in. Undersized systems fail here, not on running watts.
How much of the hour it is actually drawing power. This is what turns running watts into energy.
Multiply the battery capacity you are considering by roughly 0.85 to compare like with like.
Wired into the building
This is connected to your house wiring, not an outlet. Powering it from a portable source needs a transfer switch or an inlet installed by a licensed electrician. Never run a cord from a generator into an outlet to feed a circuit: backfeeding can kill line workers and start fires.
Safety
Every residential opener has a manual release cord. During an outage you can disconnect and lift the door by hand, which is usually the better answer than sizing a backup system around it.
Check this yourself
Check the motor horsepower on the unit label.
What can run it
Running time on one full charge at the higher running figure. “Starts it” means the peak output covers even a hard-starting one; “may not start a hard-starting one” means it covers the lower end of the starting range only.
| Product | Continuous | Peak | Starts it? | Running time |
|---|---|---|---|---|
| Zendure SuperBase V6400 | 3,800W | 5,000W | starts it | about 7 hours of running time |
| Jackery Explorer 5000 Plus | 7,200W | 14,400W | starts it | about 5 hours of running time |
| Zendure SuperBase V4600 | 3,800W | 5,000W | starts it | about 5 hours of running time |
| EcoFlow DELTA Pro 3 | 4,000W | 8,000W | starts it | about 4 hours of running time |
| Goal Zero Yeti PRO 4000 | 3,600W | 7,200W | starts it | about 4 hours of running time |
| Honda EU3000iS Inverter Generator | 2,800W | 3,000W | starts it | fuel-dependent |
| FIRMAN WH03242 Dual-Fuel Inverter | 3,200W | 4,000W | starts it | fuel-dependent |
| Champion 201444 5500W Inverter | 4,000W | 5,500W | starts it | fuel-dependent |
What will not work, and why
4 of 73 products cannot run this.
- Jackery Explorer 300D — Continuous output is 140W. This appliance draws at least 300W while running, so this unit cannot run them even in the best case.
- Anker SOLIX C300 — Peak output is 600W but starting your biggest motor needs at least 800W. Motors pull several times their normal power for a split second when they start. That split second is what shuts down an undersized unit.
- Jackery Explorer 300 v2 — Peak output is 600W but starting your biggest motor needs at least 800W. Motors pull several times their normal power for a split second when they start. That split second is what shuts down an undersized unit.
- EcoFlow RIVER 3 — Peak output is 600W but starting your biggest motor needs at least 800W. Motors pull several times their normal power for a split second when they start. That split second is what shuts down an undersized unit.