How long will the BLUETTI Apex 300 run a space heater?

About 3 hours from a full charge. A space heater averages about 750 W (1,500 W running, on about 50% of the time), and the 2,765 Wh battery gives about 2,350 Wh after inverter losses. That is 32% of the battery an hour.

Can I run other things at the same time?

Yes, up to about 2,340 W more of the 3,840 W output. Each thing you add shares the same battery, so the 3 hours for a space heater gets shorter.

Bluetti · Will it run?

Can the BLUETTI Apex 300 run a space heater (1500W)?

Published October 12, 2026

Short answerYes

Yes. The BLUETTI Apex 300 runs a space heater for about 3 hours from a full charge. It draws about 1,500 W, 39% of the 3,840 W continuous output.

Add your other devices

Key numbers

Runtime: 3 hrs; from a full charge
Battery used per hour: 32%; at 750 W average

Space heater (1500W)

Running: 1,500 W; 750–1500 W range
Start-up: 1,500 W
Average: 750 W; on 50% of the time

BLUETTI Apex 300

Battery: 2,765 Wh; about 2,350 Wh usable
Output: 3,840 W; continuous
Surge: 7,680 W; start-up peak

How we worked it out: 2,765 Wh × 0.85 ÷ 750 W average (1,500 W × 0.5 duty) = about 3 hours. The 0.85 covers inverter and battery losses. We do not test units ourselves; the numbers come from the official spec sheets and typical device draws. How we pick

BLUETTI Apex 300

2,765 Wh · 3,840 W output · 7,680 W surge · 83.8 lb

Full specs and runtimes

Check price on Amazon Check price at Bluetti

We may earn a commission if you buy through these links. It doesn’t change your price. How we make money

What else the BLUETTI Apex 300 runs

One device at a time, from a full charge.

Other power stations for a space heater

The nearest sizes that also run it.

Keep going

Real runtime depends on the model you own, room temperature and battery age. The 3 hours above is an estimate, not a measured result.

Common questions

How long will the BLUETTI Apex 300 run a space heater?: About 3 hours from a full charge. A space heater averages about 750 W (1,500 W running, on about 50% of the time), and the 2,765 Wh battery gives about 2,350 Wh after inverter losses. That is 32% of the battery an hour.
Can I run other things at the same time?: Yes, up to about 2,340 W more of the 3,840 W output. Each thing you add shares the same battery, so the 3 hours for a space heater gets shorter.