Why can’t the EcoFlow RIVER 3 Plus run a space heater?

A space heater draws about 1,500 W while it runs, 250% of the EcoFlow RIVER 3 Plus’s 600 W continuous output. Overload protection would shut the outlets off.

Which power station can run a space heater?

The smallest one we list that can is the Goal Zero Yeti 1000 (6th Gen), with 998 Wh, 2,000 W output and 3,600 W surge, for about 1 hour. Closer to the EcoFlow RIVER 3 Plus’s size, the EcoFlow DELTA 3 Plus runs it for about 1 hour.

Would an expansion battery help?

No. An extra battery adds watt-hours, not output or surge, so the EcoFlow RIVER 3 Plus stays at 600 W continuous and 1,200 W surge. You need a unit with more output.

EcoFlow · Will it run?

Can the EcoFlow RIVER 3 Plus run a space heater (1500W)?

Published October 12, 2026

Short answerNo

No. A space heater draws about 1,500 W while it runs, and the EcoFlow RIVER 3 Plus can only put out 600 W continuously. The smallest unit we list that can run it is the 998 Wh Goal Zero Yeti 1000 (6th Gen), with 2,000 W output, for about 1 hour.

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Key numbers

Runtime: Can’t run it
What stops it: Output; needs 1,500 W, has 600 W

Space heater (1500W)

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

EcoFlow RIVER 3 Plus

Battery: 286 Wh; about 243 Wh usable
Output: 600 W; continuous
Surge: 1,200 W; start-up peak

How we worked it out: 286 Wh × 0.85 ÷ 750 W average (1,500 W × 0.5 duty) would be about 20 minutes, but the output limit stops it first. 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

EcoFlow RIVER 3 Plus

286 Wh · 600 W output · 1,200 W surge · 10.4 lb

Full specs and runtimes

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What else the EcoFlow RIVER 3 Plus runs

One device at a time, from a full charge.

Other power stations for a space heater

The nearest sizes that can run it.

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Common questions

Why can’t the EcoFlow RIVER 3 Plus run a space heater?: A space heater draws about 1,500 W while it runs, 250% of the EcoFlow RIVER 3 Plus’s 600 W continuous output. Overload protection would shut the outlets off.
Which power station can run a space heater?: The smallest one we list that can is the Goal Zero Yeti 1000 (6th Gen), with 998 Wh, 2,000 W output and 3,600 W surge, for about 1 hour. Closer to the EcoFlow RIVER 3 Plus’s size, the EcoFlow DELTA 3 Plus runs it for about 1 hour.
Would an expansion battery help?: No. An extra battery adds watt-hours, not output or surge, so the EcoFlow RIVER 3 Plus stays at 600 W continuous and 1,200 W surge. You need a unit with more output.