How long will an OUKITEL P2001 Ultimate run a gas combi boiler?
About 23 hours — 22 h 43 min typically, from 21 h 23 min in the worst case to 24 h 3 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 1,454 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 | 21 h 23 min | 22 h 43 min | 24 h 3 min |
| 2 × gas combi boiler, UK 230 V | 115 W | 11 h 54 min | 12 h 38 min | 13 h 23 min |
| 1 × gas combi boiler, US 120 V | 64 W | 21 h 23 min | 22 h 43 min | 24 h 3 min |
- 2.8 nights of eight hours, or 0.95 days of continuous running.
- Usable energy: 1,454 Wh of the 2,000 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 — 1.1× 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 OUKITEL P2001 Ultimate
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 | 20 h 53 min | -8% |
| The pack is five years old | 18 h 10 min | -20% |
| It is −10 °C outside | 19 h 18 min | -15% |
| You run it flat, no reserve | 25 h 14 min | +11% |
| You keep 20% back | 20 h 11 min | -11% |
If you need it to run longer
These run a gas combi boiler for at least twice as long as the OUKITEL P2001 Ultimate does, cheapest first.
| Station | Wh | Typical | Indicative price |
|---|---|---|---|
| Zendure SuperBase V4600 | 4,608 | 47 h 10 min | £2,999 / $4,999 |
| Zendure SuperBase V6400 | 6,438 | 2 days 13 h | £3,699 / $3,999 |
| EcoFlow DELTA Pro Ultra | 6,144 | 2 days 11 h | £4,999 / $5,799 |
| Jackery Explorer 5000 Plus | 5,040 | 2 days 5 h | — / $3,499 |
Smaller options that still work
| Station | Wh | Typical | Weight | Indicative price |
|---|---|---|---|---|
| Pecron E2000LFP | 1,920 | 21 h 48 min | 22 kg | — / $599 |
| VTOMAN FlashSpeed 1500 | 1,548 | 17 h 52 min | 17 kg | — / $620 |
| VTOMAN Jump 1800 | 1,548 | 17 h 52 min | 17.5 kg | — / $999 |
| Pecron E1500LFP | 1,536 | 17 h 43 min | 17.4 kg | — / $549 |
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