About 1 hour per kWh. A 1,500 W space heater cycling on its thermostat 60 percent of the time averages 900 W, and a 1 kWh station has about 870 Wh usable. On the 750 W low setting you get about 2 hours.
Our picks at a glance
From published specs and our sizing rules. Not lab tested.
- 1
Cheapest that runs one
BLUETTI Elite 100 V2
1,024 Wh battery
Check price at BLUETTIPaid link
- 2
Heat for an evening
Anker SOLIX F3800 Plus
3,840 Wh battery
Check price at Anker SOLIXPaid link
- 3
The better plan
Sunbeam Queen Microplush Electric Heated Blanket, 2 Controllers
Check price on AmazonPaid link
Here are the hours, using capacity x 0.85 / (watts x 0.6). BLUETTI Elite 100 V2, 1,024 Wh: 1 hour at 1,500 W, 1.9 hours at 750 W. BLUETTI Elite 200 V2, 2,074 Wh: 2 hours and 3.9 hours. Anker SOLIX F3800 Plus, 3,840 Wh: 3.6 hours and 7.3 hours. EcoFlow DELTA Pro Ultra, 6,144 Wh: 5.8 hours and 11.6 hours.
So yes, a power station can run a space heater, if its continuous output is over 1,500 W. It just cannot run one for long. An electric blanket gets about 17 hours from the same 1 kWh, which is why it is the better buy for an outage night.
Top picks, and why
1,024Wh battery
BLUETTI Elite 100 V2
- 1.0 kWh
- 1,800 W continuous
1,024 Wh and 1,800 W continuous with a 3,600 W surge, so a 1,500 W heater runs with 300 W to spare. About 1 hour of heater or about 17 hours of electric blanket. Around $499, the lowest price here that can run a heater at all.
- 1,000 W solar input, tied for highest of the 1 kWh class
- 1,800 W inverter runs a coffee maker or microwave
- 10 ms UPS switchover
- Four AC outlets, fewer than the six-outlet 1 kWh units
- Not split-phase, no 240V
About $499 at BLUETTI, checked Oct 10, 2026
Check price at BLUETTIPaid link. We earn a commission at no cost to you.
Anker SOLIX F3800 Plus
- 3.8 kWh
- expands to 27 kWh
- 6,000 W continuous
- 120/240V
3,840 Wh, 6,000 W and 120/240V output, expandable to 26,880 Wh. About 3.6 hours of a 1,500 W heater or 7.3 hours on low. about $2,400, the size where a heater lasts an evening and the rest of the house still runs.
- 120/240V split phase, so it can run 240V loads like a well pump
- 9,000 W surge covers a 1/2 HP well pump start
- 3,200 W solar input, more than the original F3800 (2,400 W)
- 137 lb, plan to keep it in one place
- 20 ms switchover, slower than the 0 ms Jackery Explorer 5000 Plus
About $2,400 at Anker SOLIX, checked Oct 13, 2026
Check price at Anker SOLIXPaid link. We earn a commission at no cost to you.
Sunbeam Queen Microplush Electric Heated Blanket, 2 Controllers
Queen size, two controllers, 10 heat settings and a 10 hour auto-off. At about 50 W average it runs about 17 hours on a 1 kWh station, about 18 times longer than a 1,500 W space heater. $100 to $250.
$100 to $250, live price on Amazon
Check price on AmazonPaid link. We earn a commission at no cost to you.
Will it run your stuff?
Tick what you need to keep running. Every pick below re-sorts by how long it lasts on one charge.
Average draw about 104 W, peak about 1,251 W when the biggest motor starts.
- Check price on Amazon
EcoFlow DELTA Pro Ultra
6,144 Wh, Over $2,000
about 2 days
Paid link
- Check price at Anker SOLIX
Anker SOLIX F3800 Plus
3,840 Wh, About $2,400 at Anker SOLIX
about 32 hours
Paid link
- Check price at BLUETTI
BLUETTI Elite 200 V2
2,074 Wh, About $899 at BLUETTI
about 17 hours
Paid link
- Check price on Amazon
EcoFlow DELTA 2 Max
2,048 Wh, $500 to $1,000
about 17 hours
Paid link
- Check price at BLUETTI
BLUETTI Elite 100 V2
1,024 Wh, About $499 at BLUETTI
about 8.5 hours
Paid link
- Check price at Anker SOLIX
Anker SOLIX C1000 Gen 2
1,024 Wh, About $500 at Anker SOLIX
about 8.5 hours
Paid link
Runtime = capacity x 0.85 inverter efficiency / average draw, with fridges and freezers cycling on their compressors. Amazon links are paid links. Amazon prices change, so we show a range.
Compare every pick
Paid links: we earn a commission if you buy, at no cost to you. Amazon prices change often, so we show a range and link to the live price.
Space heater runtime by power station size
Every row uses the same math. Usable watt-hours are capacity x 0.85 after inverter losses. A heater on its thermostat runs about 60 percent of the time, so 1,500 W averages 900 W and 750 W averages 450 W.
1 kWh, BLUETTI Elite 100 V2 (1,024 Wh, 1,800 W): about 1 hour at 1,500 W and 1.9 hours at 750 W. Flat out in a cold room with no cycling, 1,500 W lasts about 35 minutes.
2 kWh, BLUETTI Elite 200 V2 (2,074 Wh, 2,600 W): about 2 hours at 1,500 W and 3.9 hours at 750 W.
3.8 kWh, Anker SOLIX F3800 Plus (3,840 Wh, 6,000 W): about 3.6 hours at 1,500 W and 7.3 hours at 750 W.
6 kWh, EcoFlow DELTA Pro Ultra (6,144 Wh, 7,200 W): about 5.8 hours at 1,500 W and 11.6 hours at 750 W.
Even the DELTA Pro Ultra (over $2,000) does not run a 1,500 W heater through one night. Use the power station sizer to run the math with your heater and the rest of your loads.
Continuous watts must be over 1,500 W
A space heater has no motor start, but it pulls its full rating the whole time it heats. A station rated 1,500 W continuous is at its limit with nothing else plugged in, and many will trip or run hot. Buy 1,800 W or more.
That rules out every 288 Wh and 768 Wh unit and the 1,500 W Jackery Explorer 1000 v2. The 750 W low setting runs on any station with 1,000 W or more, but the hours stay short.
Plug the heater straight into the station, not through an extension cord or power strip. Most heater makers say the same.
1,024Wh battery
BLUETTI Elite 100 V2
- 1.0 kWh
- 1,800 W continuous
1,024 Wh, 1,800 W, 3,600 W surge and 1,000 W of solar input in 25.3 lb. Runs a heater about 1 hour, or an electric blanket about 17 hours. Around $499, the cheapest way into a heater-capable station.
- 1,000 W solar input, tied for highest of the 1 kWh class
- 1,800 W inverter runs a coffee maker or microwave
- 10 ms UPS switchover
- Four AC outlets, fewer than the six-outlet 1 kWh units
- Not split-phase, no 240V
About $499 at BLUETTI, checked Oct 10, 2026
Check price at BLUETTIPaid link. We earn a commission at no cost to you.
Anker SOLIX C1000 Gen 2
- 1.0 kWh
- 2,000 W continuous
1,024 Wh with a 2,000 W inverter and a 10 ms UPS in 24.9 lb. The extra 200 W lets a lamp and phones share the outlet with a 1,500 W heater. about $500.
- 2,000 W inverter, highest of the 1 kWh class
- 10 ms UPS switchover
- About 17 hours of a full-size fridge per charge
- Not expandable
- Four AC outlets, two fewer than the original C1000
About $500 at Anker SOLIX, checked Oct 13, 2026
Check price at Anker SOLIXPaid link. We earn a commission at no cost to you.
2,074Wh battery
BLUETTI Elite 200 V2
- 2.1 kWh
- 2,600 W continuous
2,074 Wh and 2,600 W continuous, so a heater and a fridge run together. About 2 hours of 1,500 W heat or 35 hours of blanket. Around $899, the size to buy if the blanket and a fridge both need to last the night.
- Rated for 6,000 cycles
- 2,600 W inverter and 10 ms UPS switchover
- About 34 hours of a full-size fridge per charge
- Not expandable
- Over 50 lb at 53.4 lb
About $899 at BLUETTI, checked Oct 10, 2026
Check price at BLUETTIPaid link. We earn a commission at no cost to you.
EcoFlow DELTA 2 Max
- 2.0 kWh
- expands to 6 kWh
- 2,400 W continuous
2,048 Wh and 2,400 W, expandable to 6,144 Wh with two extra batteries. Fully expanded, that is about 5.8 hours of a 1,500 W heater. $500 to $1,000, the pick if you want to add capacity later.
- Expands to 6,144 Wh, about 3 days of fridge
- 2,400 W inverter and six AC outlets
- 1,000 W solar input
- Over 50 lb at 50.7 lb
- 20 ms switchover, slower than the DELTA 3 line
$500 to $1,000, live price on Amazon
Check price on AmazonPaid link. We earn a commission at no cost to you.
Anker SOLIX F3800 Plus
- 3.8 kWh
- expands to 27 kWh
- 6,000 W continuous
- 120/240V
3,840 Wh, 6,000 W and 120/240V, and it can feed a home panel. About 3.6 hours of heater, or about 11 hours of a gas furnace blower. about $2,400, and the furnace is the better use of it.
- 120/240V split phase, so it can run 240V loads like a well pump
- 9,000 W surge covers a 1/2 HP well pump start
- 3,200 W solar input, more than the original F3800 (2,400 W)
- 137 lb, plan to keep it in one place
- 20 ms switchover, slower than the 0 ms Jackery Explorer 5000 Plus
About $2,400 at Anker SOLIX, checked Oct 13, 2026
Check price at Anker SOLIXPaid link. We earn a commission at no cost to you.
EcoFlow DELTA Pro Ultra
- 6.1 kWh
- expands to 31 kWh
- 7,200 W continuous
- 120/240V
6,144 Wh and 7,200 W at 120/240V, expandable to 30,720 Wh. About 5.8 hours of a 1,500 W heater, the most on this page. over $2,000 for whole-home backup that can also take a heater.
- 7,200 W at 120/240V, can run 240V loads like a well pump
- Expands to 30.7 kWh with five extra batteries
- 5,600 W solar input, more than any Anker or BLUETTI unit here
- 164 lb with one battery, heavy to move
- 6 AC outlets vs 8 on the Anker F3800 models
Over $2,000, live price on Amazon
Check price on AmazonPaid link. We earn a commission at no cost to you.
What to run instead of a space heater
An electric blanket averages about 50 W, so it lasts 18 times longer than a 1,500 W heater cycling at 900 W. That is about 17 hours on 1 kWh, 35 hours on 2 kWh and 65 hours on 3.8 kWh. A heated mattress pad draws about the same and keeps the heat under you.
A gas furnace blower needs about 600 W running and averages about 300 W. A 2 kWh station runs it about 6 hours and heats the whole house, not one room.
An indoor-safe propane heater needs no power. The Mr. Heater Buddy puts out up to 9,000 BTU, about 1.75 times the heat of a 1,500 W space heater, from a 1 lb cylinder. Use it with a window cracked and a battery CO alarm in the room.
Our guide to the best heat source for a power outage covers all three, with the safety rules for propane.
Sunbeam Queen Microplush Electric Heated Blanket, 2 Controllers
Queen size with two controllers, 10 heat settings and a 10 hour auto-off. About 17 hours per 1 kWh, so a $499 station keeps the bed warm all night. $100 to $250.
$100 to $250, live price on Amazon
Check price on AmazonPaid link. We earn a commission at no cost to you.
Mr. Heater 9,000 BTU Portable Buddy Radiant Propane Heater
4,000 or 9,000 BTU for about 225 sq ft, approved for indoor use, with a low oxygen shutoff. It runs 2.4 hours on high per 1 lb cylinder, and that cylinder holds about 7 times the heat of a full 1 kWh station. under $100.
Under $100, live price on Amazon
Check price on AmazonPaid link. We earn a commission at no cost to you.
The bottom line
From published specs and our sizing rules. Not lab tested.
- 1
Cheapest that runs one
BLUETTI Elite 100 V2
1,024 Wh battery
Check price at BLUETTIPaid link
- 2
Heat for an evening
Anker SOLIX F3800 Plus
3,840 Wh battery
Check price at Anker SOLIXPaid link
- 3
The better plan
Sunbeam Queen Microplush Electric Heated Blanket, 2 Controllers
Check price on AmazonPaid link
Frequently asked questions
How long will a power station run a space heater?
About 1 hour per kWh for a 1,500 W heater cycling on its thermostat, and about 2 hours per kWh on the 750 W setting. The math is capacity x 0.85 / (watts x 0.6). A 2 kWh station gives about 2 hours at 1,500 W.
Can a power station run a space heater?
Yes, if its continuous output is over 1,500 W, so 1,800 W or more. It runs out fast, though. A 1 kWh unit lasts about 1 hour and a 6 kWh unit about 5.8 hours.
Will a 1,000 W power station run a space heater?
Only on a 750 W low setting. A 1,500 W heater overloads a 1,000 W inverter and it shuts off. Check the heater's label for its low setting before you rely on it.
How long will a 2,000 Wh power station run a 1,500 W heater?
About 2 hours with the thermostat cycling and about 1.1 hours flat out. 2,000 Wh x 0.85 = 1,700 Wh usable, divided by 900 W average or 1,500 W full.
Can solar keep a space heater running?
Not in winter for most setups. A 1,500 W heater cycling uses about 900 Wh every hour, and winter panels often make 2 to 3 sun hours a day. 1,000 W of panels at 3 sun hours gives about 3,000 Wh, about 3 hours of heater.
What uses less power than a space heater?
An electric blanket or heated mattress pad, about 50 W on average against 900 W. It runs about 17 hours on a 1 kWh power station. A gas furnace blower averages about 300 W and heats the whole house.
Is a generator better for a space heater?
Yes. A 2,500 W class inverter generator runs a 1,500 W heater for hours on a gallon or two of fuel. Run it at least 20 feet from the house with a battery CO alarm inside.
Why does my power station shut off when I plug in a space heater?
Almost always an overload. A 1,500 W heater on high pulls about 12.5 A at 120 V (1,500 / 120), so a station rated 1,500 W continuous or less trips its overload protection, sooner if anything else is plugged in. Switch the heater to its 750 W setting or use a station rated 1,800 W or more. Some stations also cut output when the battery is nearly empty or the inverter gets too hot.
Is it safe to run a space heater on a power station?
Yes, if the station's continuous rating is above the heater's wattage and the heater plugs straight into the station's AC outlet, not through an extension cord or power strip. Use a heater with tip-over and overheat shutoff, and keep it at least 3 feet from bedding, curtains and furniture, as the U.S. Consumer Product Safety Commission advises. Do not leave it running while you sleep.
How much does it cost to recharge a power station after running a space heater?
Under 20 cents for a 1 kWh station at the 17.3 cents per kWh US average. Refilling 1,024 Wh is about 1.02 kWh x $0.173 = about 18 cents, plus a little for charging losses. Running the heater straight from the wall costs about the same per hour, 0.9 kWh x $0.173 = about 16 cents at a 900 W average, so the battery adds hours of backup, not savings.
11 products are linked on this page. We have not lab-tested these products; picks are based on published specifications and our sizing rules. Amazon prices change, so we show a range and link to the live price. See our disclosure.
Size it for your home
Marcus Reed
Founder and Editor, CrunchYourDollars
Marcus Reed builds the sizing tools on CrunchYourDollars. He is a software engineer with a long-running PC hardware and power supply habit, which is where the watts, watt-hours and surge math on this site comes from. Product specs are pulled from manufacturer data sheets, electricity rates from the U.S. Energy Information Administration, and water chemistry rules from the Water Quality Association. He is not a licensed electrician or plumber: the tools show the math and the matching models so you can make the call, and anything involving your electrical panel should be checked by a licensed pro.
More about CrunchYourDollars and how we researchGet notified when we add tools
An occasional email when a new sizing tool goes live or the product database is refreshed. No spam, unsubscribe anytime.