How long will an ALLPOWERS S2000 Pro run a gas combi boiler?
About 16 hours — 15 h 37 min typically, from 14 h 41 min in the worst case to 16 h 32 min at best. That assumes a gas combi boiler pulling 85 W for 60% of the time (average 51 W), plus the station's 13 W AC mains socket overhead — 64 W in total out of 999 usable watt-hours.
The gas makes the heat, so a battery only has to run the fan, pump and controls. Most boilers are wired into a fused spur rather than a plug, and some will not light on a station’s ungrounded output — read the boiler guide before relying on it.
Before you rely on it
The battery is the easy part. Most boilers are wired into a fused spur with no plug, and some will not light on a station's floating output because they sense the flame through earth. The boiler guide explains both problems and who can fix them.
The numbers
| Setup | Average draw | Cautious | Typical | Best case |
|---|---|---|---|---|
| 1 × gas combi boiler, UK 230 V | 64 W | 14 h 41 min | 15 h 37 min | 16 h 32 min |
| 2 × gas combi boiler, UK 230 V | 115 W | 8 h 11 min | 8 h 41 min | 9 h 12 min |
| 1 × gas combi boiler, US 120 V | 64 W | 14 h 41 min | 15 h 37 min | 16 h 32 min |
- 2 nights of eight hours, or 0.65 days of continuous running.
- Usable energy: 999 Wh of the 1,451 Wh on the box, after chemistry, inverter losses and the reserve.
- To keep it going for a full 24 hours you would need about 2,114 Wh of rated capacity — 1.5× this station.
- Start-up: the gas combi boiler asks for 85 W at switch-on against this station's 4,000 W peak — comfortable.
Buy the ALLPOWERS S2000 Pro
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.
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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 | 14 h 22 min | -8% |
| The pack is five years old | 12 h 29 min | -20% |
| It is −10 °C outside | 12 h 29 min | -20% |
| You run it flat, no reserve | 17 h 20 min | +11% |
| You keep 20% back | 13 h 53 min | -11% |
If you need it to run longer
These run a gas combi boiler for at least twice as long as the ALLPOWERS S2000 Pro does, cheapest first.
| Station | Wh | Typical | Indicative price |
|---|---|---|---|
| Anker SOLIX F3000 | 3,072 | 33 h 19 min | £1,899 / $1,999 |
| Bluetti AC300 + B300 | 3,072 | 32 h 22 min | £2,499 / $2,699 |
| EcoFlow DELTA Pro | 3,600 | 37 h 55 min | £2,499 / $2,699 |
| EcoFlow DELTA Pro 3 | 4,096 | 41 h 56 min | £2,799 / $3,199 |
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 |
|---|---|---|---|---|
| Bluetti AC180P | 1,440 | 16 h 37 min | 16 kg | £899 / $649 |
| Jackery Explorer 1000 Plus | 1,264 | 14 h 49 min | 14.5 kg | £549 / $999 |
| Bluetti AC180 | 1,152 | 13 h 17 min | 16 kg | £749 / $499 |
| ALLPOWERS R1500 | 1,152 | 13 h 17 min | 16.7 kg | £699 / $539 |
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