Can a power station run an aquarium (55 gal with heater)?
Updated
Short answer
Yes. A 55-gallon tank's 200 W heater and filter average about 86 W, so a 1,000 Wh power station runs them for about 10 to 11 hours and a 2,000 Wh unit for about 20.
The heater is the big draw in a fish tank, not the filter. Our numbers use a 55-gallon tank with a 200 W heater and a 16 W canister filter, or 216 W when both are on. The heater's thermostat switches it on and off to hold the water temperature, and in a heated room we assume it runs about 40% of the time. That averages about 86 W, or about 2,070 Wh over a full day. Check the label on your heater for its watts, since a 300 W heater pushes the draw to about 316 W while it is on.
There is no start-up surge, and even the Jackery Explorer 300 v2's 300 W output covers 216 W, so every station in our table can run the tank. The question is hours. A full day takes about 2,440 Wh of battery after inverter losses, more than any 2,000 Wh unit holds. A 286 to 288 Wh unit lasts about 3 hours, the Goal Zero Yeti 500 about 5, a 1,000 Wh unit about 10 to 11 and a 2,000 Wh unit about 20 hours. Only the big units last more than a day, from about 27 hours on the BLUETTI Apex 300 to about 40 on the EcoFlow DELTA Pro 3.
Those runtimes assume a heated room. If the house cools down in a winter outage, the heater runs longer, and with it on nonstop a 1,024 Wh unit lasts only about 4 hours. A lower set point and a covered, wrapped tank bring that back toward the 40% figure. If the battery runs low, the filter alone uses about 16 W, so a 1,000 Wh unit can keep the water moving for about 2 days while the water slowly cools. Ask your fish store or vet what temperature range your fish can handle, since this page does not cover fish care.
How long does each power station run an aquarium (55 gal with heater)?
At about 86 W on average, an aquarium (55 gal with heater) runs for about 3 hrs on the 286 Wh EcoFlow RIVER 3 Plus, about 10 hrs to 11 hrs on a 1,000 Wh-class unit (998–1,070 Wh) and about 40 hrs on the 4,096 Wh EcoFlow DELTA Pro 3.
Hours an aquarium (55 gal with heater) runs on each power station, from a full charge with nothing else plugged in (15% inverter loss). Sorted by battery size.
Swipe sideways for battery size, output and price →
Hours an aquarium (55 gal with heater) runs on each power station, from a full charge with nothing else plugged in (15% inverter loss). Sorted by battery size.
Estimate: battery Wh × 0.85 ÷ 86 W average (216 W × 0.4 duty). Your model may draw more or less; check its label. Prices are typical ranges we checked by hand on October 9, 2026, not live prices.
Where these numbers come from
A Fluval E200 heater draws 200 W when it is on and a canister filter about 16 W, but the thermostat runs the heater only part of the time, so the tank averages under 100 W. In a cold house the heater runs more, and lowering the set temperature a couple of degrees saves a lot.
We do not test units ourselves. Picks come from the official spec sheets and manuals, the watt-hour math on this site, and prices we check by hand. How we pick
• Turn the heater's set point down a couple of degrees as soon as the power goes out. A smaller gap between the water and the room means the heater switches on less often.
• Cover the lid and wrap the sides and back of the tank with a blanket or foam board to hold the heat in.
• Close the door of the room the tank is in and block drafts, since the heater runs more as the room gets colder.
• Leave the tank lights off during the outage. They only add to the load.
• Run the filter alone once the battery gets low. At about 16 W, it lasts about 15 hours on a 288 Wh unit.
• Plug the heater and filter into the station before an outage and turn on its UPS mode if it has one, so the switch happens on its own.
Add the rest of your devices
Yes, it can run this, about 10 hrs for an aquarium (55 gal with heater) on the BLUETTI Elite 100 V2.
How long will a 1,000 Wh power station run an aquarium heater?
About 10 to 11 hours for a 55-gallon tank with a 200 W heater and a filter, which average about 86 W together. In a cold room where the heater never switches off, plan on about 4 hours.
Can a 300 Wh power station run an aquarium heater?
Yes, for about 3 hours on a 286 to 288 Wh unit. All three have enough output for a 216 W heater and filter, even the Jackery Explorer 300 v2 at 300 W.
How much power does an aquarium heater use in a day?
A 200 W heater that runs about 40% of the time, plus a 16 W filter, averages about 86 W, or about 2,070 Wh a day. A cold room pushes that higher.
Can I run just the aquarium filter on a power station?
Yes. At about 16 W, a filter alone runs about 15 hours on a 288 Wh unit and about 2 days on a 1,000 Wh unit. Without the heater the water slowly cools, so cover and wrap the tank.
What size power station do I need to keep a fish tank warm overnight?
A 12-hour night at about 86 W takes about 1,220 Wh of battery after losses. The 1,152 Wh BLUETTI AC180 gets you about 11 hours, so a 2,000 Wh unit, at about 20 hours, is the safer pick.
