The honest answer on a power station for a space heater is that most of them can run one, and none of them can run one for long. A standard 1,500 W heater empties a 1,024 Wh station in about 35 minutes, and even a 4,096 Wh flagship in under three hours. If your furnace's blower or igniter fails in a winter outage, that is a surprise nobody wants at 2 a.m.
EcoFlow DELTA Pro 3
It has the largest capacity (4,096 Wh) and output (4,000 W) of the units we compared, so it gives the most heater time per box and has headroom for the fridge at the same time. EcoFlow lists expansion up to 12 kWh per unit. Even so, plan on hours, not days, of heater use.
Check price on Amazon →This guide gives you the numbers first, then the batteries that do the job best, then the cheaper tricks that stretch a charge from hours into a night. We rely on manufacturer specs plus CPSC and NFPA safety guidance. We have not tested any of these units with a heater.
A 1,500 W heater needs 1.5 kWh for every hour. The EcoFlow DELTA Pro 3 (4,096 Wh) gives about 2.3 hours at full blast, or about 4.6 hours on a 750 W setting. For a whole night, a 100 W heated blanket on a 1-2 kWh station beats any room heater. Use a heater only as a short top-up, plug it directly into the station, and keep it 3 feet from anything that can burn.
Quick comparison
| Product | Best for | Key detail | Price class | |
|---|---|---|---|---|
| EcoFlow DELTA Pro 3 (4,096 Wh) | Longest heater runtime from one unit | 4,000 W; about 2.3 h at 1,500 W | $$$$ · High-end | Check price |
| Bluetti Apex 300 (2,764.8 Wh) | Heater plus fridge and router with room to expand | 3,840 W; about 1.6 h at 1,500 W | $$$ · Premium | Check price |
| EcoFlow DELTA 3 Max Plus (2,048 Wh) | Mid-size backup that can add batteries | 3,000 W; about 1.2 h at 1,500 W | $$$ · Premium | Check price |
| Bluetti Elite 200 V2 (2,073.6 Wh) | Low-watt warmth for a night, best price per Wh | 2,600 W; 17.6 h at 100 W blanket | $$$ · Premium | Check price |
| EcoFlow DELTA 3 Plus (1,024 Wh) | Heated blanket and short heater bursts | 1,800 W; about 35 min at 1,500 W | $$$ · Premium | Check price |
Our picks, one by one
EcoFlow DELTA Pro 3 (4,096 Wh)Longest heater runtime
EcoFlow lists 4,096 Wh, 4,000 W continuous (6,000 W with X-Boost), 4,000 cycles to 80% and a 5-year warranty. Our math gives about 2.3 hours on a 1,500 W heater and about 4.6 hours at 750 W. EcoFlow's own blog says almost three hours at full tilt, because it ignores conversion losses. Extra batteries add another 4,096 Wh and double those hours at a premium price. Beside the Apex 300 it gives you 48% more energy for noticeably more money.
Check price on Amazon →Bluetti Apex 300 (2,764.8 Wh)Best value for a bigger system
Bluetti lists 2,764.8 Wh, 3,840 W pure sine wave, up to 6,000 cycles to 80% and 5 years on the unit. It is cheaper than the DELTA Pro 3 by a wide margin. You get about 3.1 hours at 750 W. The B300K expansion battery adds another 2,764.8 Wh. Compared with the Max Plus it gives 35% more energy for a bit more money.
Check price on Amazon →EcoFlow DELTA 3 Max Plus (2,048 Wh)Mid-size, expandable
EcoFlow lists 2,048 Wh, 3,000 W (6,000 W surge) and 2 to 10 kWh of expansion, with a 5-year warranty if you register in the app. At 750 W you get about 2.3 hours, enough to take the chill out of one room before bed. It undercuts the Apex 300 by a modest amount. It loses on size and on cycles.
Check price on Amazon →Bluetti Elite 200 V2 (2,073.6 Wh)Best for all-night low-watt warmth
Bluetti lists 2,073.6 Wh, 2,600 W, 5-year warranty and a 1.4 hour full recharge. At 100 W for a blanket it covers about 17.6 hours. That is more than a full night of heat. At 1,500 W you get about 1.2 hours. It costs less than the DELTA 3 Max Plus for almost the same Wh.
Check price on Amazon →EcoFlow DELTA 3 Plus (1,024 Wh)Budget, blanket-first
EcoFlow lists 1,024 Wh, 1,800 W continuous (3,600 W surge), 27.6 lbs, 4,000 cycles and a 5-year warranty. Its output is high enough to start a 1,500 W heater. A 100 W blanket would run about 8.7 hours. Pair it with the sleeping bag and the blanket, and treat the heater as an emergency extra.
Check price on Amazon →How we chose
We started from a physical limit: a 1,500 W heater turns almost all of its power into heat, so runtime is battery watt-hours divided by 1,500, minus losses. We kept only LiFePO4 stations from EcoFlow and Bluetti whose manufacturer pages we could open, whose continuous output is at least 1,800 W, and which Amazon sells. Capacity, output and price came from the maker pages. The 0.85 efficiency factor is our own conservative assumption, and manufacturers' blogs often leave it out.
This is a researched comparison, not a lab test. We did not run heaters on these units. We also left out heaters by brand: heater models change fast, and the station math holds for any electric model with the same wattage. Always read your heater's label for its real draw, because a unit sold as 1,500 W can pull slightly more or less.
The runtime math, station by station
A 1,500 W heater draws 1.5 kWh every hour it runs flat out. Many room heaters have a 750 W low setting, and a heated blanket draws about 50 to 200 W. Here is how long each unit lasts.
| Station | Wh | 1,500 W heater | 750 W setting | 100 W heated blanket |
|---|---|---|---|---|
| EcoFlow DELTA 3 Plus | 1,024 | 35 min | 70 min | 8.7 h |
| Bluetti Elite 200 V2 | 2,074 | 71 min | 2.4 h | 17.6 h |
| EcoFlow DELTA 3 Max Plus | 2,048 | 70 min | 2.3 h | 17.4 h |
| Bluetti Apex 300 | 2,765 | 1.6 h | 3.1 h | 23.5 h |
| EcoFlow DELTA Pro 3 | 4,096 | 2.3 h | 4.6 h | 34.8 h |
| DELTA Pro 3 + 1 extra battery | 8,192 | 4.6 h | 9.3 h | 69.6 h |
Formula: runtime in hours = rated Wh x 0.85 (inverter and conversion losses) divided by load in watts. It assumes the heater runs flat out the whole time; a thermostat that cycles the heater off will stretch these numbers. All heater and blanket loads fit under each station's continuous rating.
Two things in the table matter. First, a heater with a working thermostat cycles off once the room is warm, so real use is often lower than flat-out math. Second, a second battery doubles the hours but not the problem: every hour of full heater still burns 1.5 kWh, and a 4,096 Wh EcoFlow extra battery is a separate premium-priced purchase.
Cheaper ways to stay warm on a battery
Heat the person, not the room.
- Heated blanket or throw: Bluetti's guide puts electric blankets at 50 to 200 W. At 100 W, a 2,000 Wh station runs it for about 17 hours.
- Low setting on the heater: EcoFlow notes ceramic fan heaters run 750 to 900 W on low. That doubles your runtime compared with 1,500 W.
- Close one room: shut doors, hang a blanket over a window, and heat only that room. Our outage checklist has the room-by-room list.
- Layers and sleeping bags rated for cold: zero watts.
Use the heater for 15 to 30 minutes in the evening, then switch to the blanket. That plan runs a night on a 1 to 2 kWh station.
Fire safety: what CPSC and NFPA say
The Consumer Product Safety Commission says to keep portable heaters at least 3 feet from drapes, furniture, bedding and other combustibles, to plug them directly into a wall outlet and never an extension cord or power strip, and to turn them off when you sleep. CPSC estimates portable heaters, including electric ones, are involved in about 1,600 fires, 70 deaths and 150 injuries a year (2020 to 2022 average).
NFPA's tip sheet adds a heater with a thermostat, overheat protection and an auto shut-off if it tips, a seal from a qualified testing laboratory, and a rule to turn it off and unplug it when you leave the room or go to bed. With a power station, plug the heater directly into the station's AC outlet. Never feed a heater from an extension cord or power strip, and do not run a gas or kerosene heater indoors. CPSC also asks for working smoke and CO alarms on every level.
A realistic overnight plan with the watt math
Here is an evening-to-morning budget for a cold outage that keeps the fridge, router and one person warm. Fridge use of 1 to 2 kWh a day and a 10 to 15 W router are the planning numbers we use across this site.
| Load | Watts | Hours | Wh |
|---|---|---|---|
| Heater, 750 W setting, evening warm-up | 750 | 1 | 750 |
| Heated blanket, overnight | 100 | 8 | 800 |
| Fridge (mid-range, 12 h share of a 1.5 kWh day) | about 125 avg | 12 | 750 |
| Router and phone charging | about 20 | 12 | 240 |
| Total drawn | 2,540 | ||
| Battery needed at 85% | about 2,990 |
Formula: battery needed = total Wh drawn divided by 0.85.
That plan fits the DELTA Pro 3 with room to spare and misses the Apex 300 (2,764.8 Wh) by a few hundred Wh unless you add a B300K module or shorten the heater time. Drop the heater warm-up entirely and the total falls to 1,790 Wh, or about 2,100 Wh of battery, which suits the Elite 200 V2 (2,073.6 Wh) if you trim the fridge share a little. That 750 Wh warm-up hour is the single biggest swing in the plan. It is also why we say size the station for the blanket and the fridge first, and treat the heater as a bonus. Recharge matters too: if the outage lasts several days, solar panels or a car-charging cable put back some of those watt-hours each day, and our portable solar panel guide shows what a sunny winter day can realistically return. Short winter days and low sun angles cut that number, so assume less than the panel's label.
What to look for in the heater itself
The best station cannot fix a poor heater. NFPA recommends a heater with a seal from a qualified testing laboratory, a thermostat, overheat protection and an auto shut-off if it tips over. Choose a model with a low setting around 750 W, so you can pick the power level instead of living with 1,500 W all the time. Oil-filled radiators hold heat after the thermostat cuts power, which helps a battery stretch. Skip any heater that wants a power strip or extension cord.
Do not run propane, kerosene or other fuel heaters indoors from a battery plan. They are a carbon monoxide risk. If you are worried about winter outages, a working CO alarm matters more than the biggest battery you can buy.
Who should NOT buy a power station for a space heater
- You hope to heat the whole house for days. At 1,500 W that is 36 kWh a day. You need your furnace repaired, a wood stove installed by a pro, or a different shelter plan.
- You want to leave a heater running while you sleep. CPSC says to turn heaters off at night. Use a blanket with auto shut-off instead.
- You rely on electric heat for health. Talk to your doctor and your utility about a plan; a consumer power station is not a medical-grade solution.
- You plan to wire it to your furnace or panel yourself. A licensed electrician must make any panel or furnace connection.
Check our sizing guide before you buy, and see whether a home battery is worth it for your outage history.
Our #1 pick: EcoFlow DELTA Pro 3
If you only read one line of this guide: this is the one we would buy.
Check price on Amazon →Frequently asked questions
Can a power station run a 1500W space heater?
Yes, if its continuous output is at least 1,500 W, which all the units here exceed. The limit is runtime: about 35 minutes on a 1,024 Wh station and about 2.3 hours on a 4,096 Wh one, after losses.
How long will a 2000Wh power station run a space heater?
About 1.2 hours at 1,500 W, 2.3 hours at 750 W, using 85% efficiency. A heater that cycles with its thermostat will last longer.
What is the best power station for a space heater?
For the most heater time, the EcoFlow DELTA Pro 3 at 4,096 Wh. For best value, the Bluetti Apex 300 or Elite 200 V2. For all-night warmth, a heated blanket on any of them beats a room heater.
Is it safe to plug a space heater into a power station?
Yes if you follow CPSC rules: plug the heater directly into the station outlet, no extension cord or power strip, 3 feet clear of anything that burns, and turn it off when you sleep.
What can I use instead of a space heater during a power outage?
A 50 to 200 W electric blanket, layered clothing and a cold-rated sleeping bag, and closing off one room. These stretch a single charge to a full night.
Price classes are a rough guide; check the current price on Amazon. As an Amazon Associate we earn from qualifying purchases, at no extra cost to you.