How Long Will a Power Station Run a Dehumidifier?

By Hicham M. · Updated October 17, 2026 · How we calculate

A wet basement after a storm is exactly when the power tends to be out. A 50-pint dehumidifier draws about 490 W while its compressor runs, and around 1,000 W for a moment as it starts. The humidistat switches the compressor off once the air is dry enough, so we plan on it running about half the time: 245 W on average, or 5.9 kWh a day.

That is a lot for a battery. A 1,000 Wh power station lasts about 3.5 hours and a 2,000 Wh one about 6.9 hours. Run it nonstop in a soaked basement and it’s closer to 1.7 hours on 1,000 Wh.

Running490 Wtypical range 340–785 W

Starting (surge)1,000 Wfor a split second

Average245 Wincluding on/off cycling

Per day5.9 kWhat 24 h/day

Calculate with your model Find the right size

Runtime by power station

Nonstop runtime for one dehumidifier at 245 W average, with 85% inverter efficiency. Models that can't supply its running or starting power are listed separately below.

How long each power station runs a dehumidifier: longest 10
Power station	Battery	Runtime
Jackery Explorer 5000 Plus	5,040 Wh	17 hours
EcoFlow DELTA Pro 3	4,096 Wh	14 hours
Goal Zero Yeti PRO 4000	3,994 Wh	14 hours
Anker SOLIX F3800	3,840 Wh	13 hours
Anker SOLIX F3800 Plus	3,840 Wh	13 hours
EcoFlow DELTA Pro Older	3,600 Wh	12 hours
Anker SOLIX F3000	3,072 Wh	11 hours
BLUETTI Elite 300	3,014 Wh	10 hours
BLUETTI Apex 300	2,765 Wh	9.6 hours
BLUETTI Elite 200 V2	2,074 Wh	7.2 hours

Show the other 38 models that can run it

How long each power station runs a dehumidifier: the rest
Power station	Battery	Runtime
EcoFlow DELTA 3 Max	2,048 Wh	7.1 hours
EcoFlow DELTA 3 Max Plus	2,048 Wh	7.1 hours
EcoFlow DELTA 2 Max Older	2,048 Wh	7.1 hours
BLUETTI AC200L	2,048 Wh	7.1 hours
BLUETTI AC200MAX Older	2,048 Wh	7.1 hours
Anker SOLIX C2000 Gen 2	2,048 Wh	7.1 hours
Anker SOLIX F2000 (767) Older	2,048 Wh	7.1 hours
DJI Power 2000	2,048 Wh	7.1 hours
Jackery Explorer 2000 v2	2,042 Wh	7.1 hours
Jackery Explorer 2000 Plus Older	2,042 Wh	7.1 hours
BLUETTI AC200P Older	2,000 Wh	6.9 hours
Jackery Explorer 1500 v2	1,536 Wh	5.3 hours
Jackery Explorer 1500 Ultra	1,536 Wh	5.3 hours
Goal Zero Yeti 1500X Older	1,516 Wh	5.3 hours
Goal Zero Yeti 1500	1,505 Wh	5.2 hours
Jackery Explorer 1000 Plus	1,264 Wh	4.4 hours
Anker SOLIX F1200 (757) Older	1,229 Wh	4.3 hours
BLUETTI AC180	1,152 Wh	4 hours
Jackery Explorer 1000 v2	1,070 Wh	3.7 hours
Anker SOLIX C1000	1,056 Wh	3.7 hours
EcoFlow DELTA 3	1,024 Wh	3.6 hours
EcoFlow DELTA 3 Plus	1,024 Wh	3.6 hours
EcoFlow DELTA 2 Older	1,024 Wh	3.6 hours
BLUETTI Elite 100 V2	1,024 Wh	3.6 hours
Anker SOLIX C1000 Gen 2	1,024 Wh	3.6 hours
DJI Power 1000	1,024 Wh	3.6 hours
Jackery Explorer 1000 Pro Older	1,002 Wh	3.5 hours
Jackery Explorer 1000 Older	1,002 Wh	3.5 hours
Goal Zero Yeti 1000	998 Wh	3.5 hours
EcoFlow RIVER 2 Pro Older	768 Wh	2.7 hours
Anker SOLIX C800 Plus	768 Wh	2.7 hours
BLUETTI EB70S Older	716 Wh	2.5 hours
Goal Zero Yeti 700	677 Wh	2.3 hours
Jackery Explorer 500 Older	518 Wh	1.8 hours
EcoFlow RIVER 2 Max Older	512 Wh	1.8 hours
DJI Power 500	512 Wh	1.8 hours
EcoFlow RIVER 3 Plus	286 Wh	60 min
BLUETTI EB3A Older	269 Wh	56 min

Models that can't run it

Power station	Output	Surge	Why
Jackery Explorer 300	300 W	500 W	Not enough output
Jackery Explorer 300 v2	300 W	600 W	Not enough output
Anker SOLIX C300	300 W	600 W	Not enough output
Jackery Explorer 240 v2	300 W	600 W	Not enough output
EcoFlow RIVER 3	300 W	600 W	Not enough output
Jackery Explorer 240	200 W	400 W	Not enough output

We may earn a commission if you buy through these links. It never changes our numbers, and every model in our database is included whether or not it pays us. Learn more.

Where the 490 W comes from

Dehumidifier makers rarely print a wattage, but ENERGY STAR publishes two numbers for every certified model: how many pints of water it pulls out a day, and its Integrated Energy Factor (IEF), in liters of water per kWh. Divide one by the other and you get the energy it takes to run all day.

Take the Frigidaire FHDD5033Y1, rated 49.95 pints a day at an IEF of 2.01. A US pint is about 0.47 liters (NIST), so that’s 23.5 liters a day ÷ 2.01 L/kWh = 11.7 kWh if it ran for 24 hours, or about 490 W while running. We did the same sum for all 541 portable models on the list:

Dehumidifier running watts by size class
Size class (median model)	Capacity	IEF	Running	Nonstop on 1,000 Wh	Half the time on 1,000 Wh
Small (18–25 pints, 181 models)	24 pints	1.76	260 W	3.3 hours	6.5 hours
Medium (30–37 pints, 90 models)	35.3 pints	2.01	344 W	2.5 hours	4.9 hours
Large (45–50 pints, 167 models)	49.8 pints	2.01	485 W	1.8 hours	3.5 hours
Whole-home (24 models)	65 pints	2.30	566 W	1.5 hours	3 hours

Our calculation from ENERGY STAR certified-product data (17 October 2026). Every 45–50 pint model on the list came out between about 395 and 490 W. Whole-home units are usually ducted and installed by a contractor, so they’re shown for scale only.

The bigger units are more efficient per pint, but not by enough to save the battery. The median 50-pint model draws nearly 1.9 times the power of the median 24-pint one while pulling about twice the water. If a power station is all you have, a smaller unit in a closed-off room is the realistic choice.

The annual figures on the list point the same way. The median 50-pint model is rated at 520 kWh a year, which at 485 W works out to about 1,070 hours of running, close to the 1,095 hours of dehumidifying that DOE’s test procedure assumes for a year.

Why the rating may not match your basement

Capacity ratings changed in June 2019. DOE now tests portable dehumidifiers at 65°F and 60% relative humidity, instead of 80°F, which is why a unit once sold as 70 pints is now labeled about 40–45 pints, per ENERGY STAR. Same machine, cooler test.

A flooded basement can be wetter or colder than that. ENERGY STAR warns that frost can form on the condensing coils when the air drops below 65°F, and it says to size up rather than down: for a wet space under 2,000 sq ft it lists 30–50 pints, and “it’s better to oversize than undersize!” On a battery, that advice collides with the wattage table above, which is why drying one closed room at a time makes sense.

The 24–48 hour window for mold

The EPA says to dry water-damaged areas and items within 24–48 hours to prevent mold growth, and to keep indoor humidity below 60%, ideally between 30 and 50%. The CDC gives the same 24–48 hour window after a flood and says to keep humidity no higher than 50%, noting that an air conditioner or dehumidifier helps.

That timeline is what makes a power station useful here. You don’t need to run a dehumidifier for a week on battery, but the first two days count most. The EPA says you can often clean up a moldy area of less than about 10 square feet yourself; for more than that, it points to its guide on mold remediation in schools and commercial buildings.

Drying out on battery

Close the door to the wettest room and dry that space first. A dehumidifier in an open basement works on far more air than one in a closed room.
Set the humidistat to about 50%. Going lower keeps the compressor running long after the CDC and EPA targets are met.
Pump or mop out standing water before relying on the dehumidifier. Pulling liquid water out of the air a pint at a time costs about 0.23 kWh per pint on a typical 50-pint unit (0.47 L ÷ 2.01 L/kWh).
Set the station’s AC outlet timeout to “never”, or it may switch off while the compressor rests between cycles.
Put in your unit’s pints and IEF, or its rated watts, in the runtime calculator. Add a sump pump if you have one: both can be running at once.

Questions

How many watts does a dehumidifier use?

From ENERGY STAR’s data, the median certified portable models work out to about 260 W for a 24-pint unit, about 345 W for a 35-pint unit and about 490 W for a 50-pint unit while the compressor is running. Divide the pints per day (times 0.47 for liters) by the IEF, then by 24, for your own model.

Can a 1,000 Wh power station run a dehumidifier overnight?

A small one, roughly. A 24-pint unit at about 260 W running half the time would last about 6.5 hours. A 50-pint unit at the same duty lasts about 3.5 hours.

Is a smaller dehumidifier better on a power station?

Usually. It removes less water per day, but it draws about half the power of a 50-pint unit, so it runs about twice as long and fits stations with a smaller inverter.

How fast does mold grow after a flood?

The EPA and CDC both say to dry wet areas within 24–48 hours to prevent mold growth.

Sources

Wattage figures are typical values from the sources below. Your appliance may differ, so check its label or measure it with a plug-in watt meter.