How long will an EcoFlow DELTA Max 1600 run a gas furnace?
About 3.5 hours — 3 h 31 min typically, from 3 h 19 min in the worst case to 3 h 44 min at best. That assumes a gas furnace pulling 600 W for 50% of the time (average 300 W), plus the station's 13 W AC mains socket overhead — 313 W in total out of 1,103 usable watt-hours.
The gas makes the heat, but the blower that pushes warm air through the ducts is a real motor with a real start-up surge — far more than a British combi boiler. Variable-speed (ECM) blowers usually draw less.
Before you rely on it
A furnace blower is a real motor with a start-up surge, and most furnaces are hard-wired with no plug. Some will not light on a station's floating output because they sense the flame through ground. The furnace guide explains all three problems and the safe way to connect one.
The numbers
| Setup | Average draw | Cautious | Typical | Best case |
|---|---|---|---|---|
| 1 × gas furnace, UK 230 V | 313 W | 3 h 19 min | 3 h 31 min | 3 h 44 min |
| 2 × gas furnace, UK 230 V | 613 W | 1 h 41 min | 1 h 48 min | 1 h 55 min |
| 1 × gas furnace, US 120 V | 313 W | 3 h 19 min | 3 h 31 min | 3 h 44 min |
- 0.4 nights of eight hours, or 0.15 days of continuous running.
- Usable energy: 1,103 Wh of the 1,602 Wh on the box, after chemistry, inverter losses and the reserve.
- To keep it going for a full 24 hours you would need about 10,336 Wh of rated capacity — 6.5× this station.
- Start-up: the gas furnace asks for 1,500 W at switch-on against this station's 4,600 W peak — comfortable.
Buy the EcoFlow DELTA Max 1600
Where to buy
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If this is for a power cut
Heating is what a battery does worst. In a power cut, warming people rather than rooms goes much further, and none of this needs a socket.
Without a power station: a 20,000 mAh power bank runs a USB heated throw for about 7 h 24 min. See the power bank numbers.
Hot water bottle and a vacuum flask. Boil water while you still can, keep it hot in a flask, and refill the bottle through the night.
Look for: A bottle made to BS 1970 in the UK, and a flask of a litre or more.
Hand warmers. Air-activated packs give hours of heat with no power at all, and a pocketful helps children and older relatives.
Look for: Long-duration packs, and the expiry date on bulk boxes.
Amazon links are affiliate searches for a type of product, not endorsements of a model; the site may earn a commission at no extra cost to you.
More: How to keep warm in a power cut, and the power cut essentials list (US edition).
What changes the answer
| If instead… | Typical runtime | Change |
|---|---|---|
| The pack is two years old | 3 h 14 min | -8% |
| The pack is five years old | 2 h 49 min | -20% |
| It is −10 °C outside | 2 h 49 min | -20% |
| You run it flat, no reserve | 3 h 55 min | +11% |
| You keep 20% back | 3 h 8 min | -11% |
If you need it to run longer
These run a gas furnace for at least twice as long as the EcoFlow DELTA Max 1600 does, cheapest first.
| Station | Wh | Typical | Indicative price |
|---|---|---|---|
| Anker SOLIX F3000 | 3,072 | 7 h 4 min | £1,899 / $1,999 |
| EcoFlow DELTA Pro | 3,600 | 8 h 14 min | £2,499 / $2,699 |
| EcoFlow DELTA Pro 3 | 4,096 | 9 h 18 min | £2,799 / $3,199 |
| Anker SOLIX F3800 | 3,840 | 8 h 47 min | £2,999 / $3,499 |
The cheapest step up: Anker SOLIX F3000
Amazon and approved-programme links are affiliate links; the site may earn a commission at no extra cost to you. Links marked “official site” are untracked. Prices and stock change constantly — check before you buy.
Smaller options that still work
| Station | Wh | Typical | Weight | Indicative price |
|---|---|---|---|---|
| VTOMAN FlashSpeed 1500 | 1,548 | 3 h 37 min | 17 kg | — / $620 |
| VTOMAN Jump 1800 | 1,548 | 3 h 37 min | 17.5 kg | — / $999 |
| Pecron E1500LFP | 1,536 | 3 h 35 min | 17.4 kg | — / $549 |
| Bluetti AC240 | 1,536 | 3 h 34 min | 33 kg | £1,099 / $999 |
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