What Can a 1,000Wh Power Station Run?
Updated September 2026A 1,000Wh power station gives you roughly 850Wh of usable energy once inverter losses are accounted for. That’s enough to run a laptop for about 14 hours, charge a phone more than 50 times, or keep a fridge going for much of a day. It won’t run a kettle, a fan heater or anything that needs a lot of continuous power.
We build these figures from manufacturer spec sheets and verified UK owner reviews, then run the maths on typical UK appliance wattages rather than guessing. The short version: capacity (Wh) tells you how long a power station lasts, and output (W) tells you what it can power at any one moment. Mixing the two up is the easiest way to end up disappointed on the day.
Below, we cover both numbers properly, show an appliance-by-appliance breakdown with real runtimes, and explain the loads a 1,000Wh unit simply can’t handle. There’s also a formula so you can run your own numbers for any device not listed here, or use our sizing calculator if you’d rather skip the arithmetic.
What's the difference between 1,000W and 1,000Wh?
1,000W is an output rating: how much power you can draw from the unit at any single moment. 1,000Wh is a capacity rating: how much total energy is stored, and therefore how long that output can be sustained. A power station is limited by both figures at once, not either one alone.
This is the question most guides get muddled, and it’s the one that actually matters when you’re deciding whether a power station will suit you. Watts measure a rate, like the flow from a tap. Watt-hours measure a volume, like the amount of water in the tank. A unit rated at 1,000Wh might have a 1,000W, 1,500W or 1,800W inverter depending on the model; capacity and output are set independently by the manufacturer.
So two separate limits apply every time you plug something in. First, does the appliance’s wattage sit under the inverter’s continuous output? If not, the unit won’t power it, however much charge is left in the battery. Second, given that wattage, how long will the stored energy last? A 200W appliance on an 1,800W inverter will run fine, but it will still drain 850Wh of usable capacity in a bit over four hours.
What can a 1,000Wh power station actually run?
From roughly 850Wh of usable energy, a 1,000Wh power station comfortably handles phones, laptops, routers, lights, a small TV and a CPAP machine, plus short bursts from a microwave or coffee maker. Fridges are the trickiest to estimate because their compressors cycle on and off rather than drawing power constantly.
| Appliance | Typical draw | Approx. runtime from 1,000Wh |
|---|---|---|
| Smartphone | ~15Wh per full charge | 50+ full charges |
| Laptop | 60W | ~14 hours |
| Wi-Fi router | ~10W | ~85 hours (over 3 days) |
| LED light | ~10W | ~85 hours |
| 32in TV | ~60W | ~14 hours |
| CPAP machine | ~40W | ~21 hours (roughly 2-3 nights) |
| Camping fridge | ~60W rated, cycling | around a day of realistic use |
| Fridge-freezer | ~150W running, cycling | roughly 10-14 hours in practice |
| Microwave | ~1,000W | under an hour (a handful of short uses) |
| Coffee maker | ~1,000W | a few brews |
These figures use the runtime formula further down the page, so they already account for the energy an inverter loses converting stored DC power into 230V AC.
Fridges are the exception. The wattage on the label is what the compressor draws while it’s actually running, not a constant figure. Compressors cycle, switching off once the target temperature is reached and kicking back in as it drifts up. A fridge rated at 150W might only draw power for half of each hour, so real runtime is usually much longer than the raw maths suggests.
What can't a 1,000Wh power station run?
A UK kettle (around 3,000W), a fan heater (around 2,000W), an electric shower and an oven all sit above what a typical 1,000Wh unit’s inverter can output continuously. It’s the output limit that blocks these, not the stored capacity, which is why watts deserve as much attention as watt-hours.
A UK kettle is the classic trap: it draws around 3,000W, more than most power stations can deliver. Even a generously specified 1,000Wh unit with an 1,800W inverter falls well short, so the kettle simply won’t switch on, regardless of how much charge is left. Fan heaters sit in similar territory at around 2,000W, as do electric showers and ovens, all of which rely on resistive heating elements that pull hard the moment they’re switched on.
This is a continuous output problem, not a capacity problem. A bigger battery in the same housing wouldn’t fix it, because it’s the inverter, not the cells, deciding what you can plug in. It’s also worth remembering surge watts: anything with a motor or compressor, such as a fridge, a power tool or a pump, draws a short spike well above its running wattage just to start. A unit’s continuous rating might cover the appliance once it’s running, but an undersized inverter can still trip out on that initial surge.
Is 1,000Wh enough for camping?
For most weekend trips, yes. Lighting, phone charging and a camping fridge over two nights typically add up to somewhere around 540-740Wh, which sits inside a 1,000Wh unit’s 850Wh of usable capacity. A hot weekend that makes the fridge work harder will push you closer to the limit.
Take a typical two-night weekend. LED lighting for a few hours each evening comes to around 80Wh across the trip. Charging two phones and a head torch adds roughly 60Wh. The camping fridge is the biggest draw by far: a typical 12V compressor model uses somewhere around 200-300Wh a day in UK conditions, because the compressor cycles rather than running flat out. Over two days that’s roughly 400-600Wh.
Add it up and you’re looking at 540-740Wh against 850Wh usable, so a weekend is comfortable with a little margin left. Warm weather, a fuller fridge or a third night all eat into that margin quickly, and that’s when solar top-ups start to matter. If your trips run longer, or you’ll be adding a projector or fan, our best power stations for camping includes models with more headroom.
Is 1,000Wh enough for a power cut?
For a typical UK outage lasting a few hours to half a day, yes. A 1,000Wh unit can keep a fridge-freezer, a Wi-Fi router, some lighting and phone charging going for a good part of the day, which covers most domestic power cuts without difficulty.
Most UK power cuts are resolved within a few hours, and even longer ones from storm damage or substation faults rarely stretch much beyond a day. A fridge-freezer left running through an outage will typically draw on a full 1,000Wh charge for roughly 10-14 hours in practice, helped by the compressor cycling rather than running constantly. Keep a router going, add a couple of LED lights, and top up a phone or two, and you’re still inside the 850Wh usable budget for most of a day.
Where 1,000Wh starts to feel tight is a genuinely long cut, overnight and into the next day, especially if you’re also running a laptop for work and charging several devices. For that, our home backup power station picks include larger-capacity models built for extended use.
1,000Wh vs 2,000Wh: which should you choose?
1,000Wh suits weekend camping, short power cuts and everyday device charging. 2,000Wh is worth the extra outlay if you need to run a fridge-freezer continuously, expect multi-day outages, or you’re living or working from a van where recharging isn’t always convenient.
Roughly double the stored energy sounds like a simple upgrade, and for the right use case it is. A fridge-freezer running non-stop through a multi-day power cut will work through 1,000Wh quickly once you add lighting and charging on top; 2,000Wh gives you the margin to keep it going without watching the battery level. The same logic applies to van life and off-grid setups, where you might run a fridge, lighting, a laptop and charging for days between proper recharges.
If your use is closer to weekend trips, occasional short outages, or charging laptops and phones day to day, 1,000Wh is usually enough without paying for headroom you won’t use. Our power station size guide walks through the wider decision, and our comparison of LiFePO4 and Li-ion chemistry covers how battery type affects long-term value.
How to work out runtime yourself
The formula behind every figure on this page is straightforward. The 0.85 accounts for the energy lost converting the battery’s stored DC power into the 230V AC that mains appliances need.
Runtime (hours) = capacity (Wh) × 0.85 ÷ appliance draw (W)
Worked example: for a 100W device, such as a small projector or games console, on a 1,000Wh power station, that’s 1,000 × 0.85 ÷ 100, which comes to 8.5 hours. Halve the wattage and you roughly double the runtime, and vice versa. If you’d rather skip the arithmetic, our free sizing calculator does it automatically for any appliance and capacity.
Frequently Asked Questions
1000W is an output rating: the maximum power a unit can deliver at any one moment. 1000Wh is a capacity rating: the total energy stored, which determines how long that output can be sustained. A power station needs to clear both limits for a given appliance; the wattage has to fit under the inverter’s output, and the watt-hours have to be enough to run it for as long as you need.
It depends entirely on what you’re running. A 1,000Wh unit gives roughly 850Wh of usable energy after inverter losses, which is around 14 hours for a laptop, over 80 hours for a Wi-Fi router or LED light, and 50 or more full phone charges. Heavier loads such as a microwave or coffee maker will drain it in under an hour.
No, not in most cases. A UK kettle draws around 3,000W, which exceeds the continuous output of a typical 1,000Wh unit’s inverter, usually somewhere between 1,000W and 1,800W. This is a power output limit rather than a capacity issue, so a bigger battery in the same unit wouldn’t change the outcome.
Yes, comfortably. A fridge-freezer’s compressor cycles on and off rather than drawing power constantly, so real consumption is lower than its rated wattage suggests. A full 1,000Wh charge typically covers roughly 10-14 hours of fridge-freezer use in practice, which spans a single overnight period with room to spare.
For most people, yes. Lighting, phone charging and a camping fridge over two nights typically total somewhere around 540-740Wh, which fits inside the 850Wh of usable capacity a 1,000Wh unit provides. Longer trips, warmer weather or a larger fridge may need extra capacity or a solar top-up.
Choose 1,000Wh for weekend camping, everyday device charging and short power cuts. Choose 2,000Wh if you need to run a fridge-freezer continuously through a multi-day outage, you’re using it for van life or off-grid living, or you regularly run higher-wattage appliances more than once or twice a day.
Head back to the guides hub for the full library, or browse our best portable power stations shortlist for 1,000Wh-class models worth comparing.
Not sure 1,000Wh is enough?
Run your own numbers rather than relying on averages. The sizing calculator turns your appliance list into a watt-hour target in under a minute, and the finder quiz matches you to a model that fits.
Power Station Finder
Answer 5 quick questions and get a personalised power station recommendation.
Finder Quiz