Can a portable power station run a fridge? (UK)
Usually yes — but only if you have enough surge power for the compressor and enough Wh to last the outage.
- Running power: many fridges average ~50–150W (but cycle on/off)
- Startup surge: can spike 2–6× briefly
- Rule of thumb: aim for 1000W+ surge if you want fewer trips
Best next step
If you’re buying, start with our top picks.
See top picks (UK)Fridge‑ready picks (3 solid options)
PCRThese have higher surge ratings, which is what usually trips up fridges.
- Good balance of capacity + surge
- Better odds of handling compressor start
- More headroom for surge + longer runtime
- Better for longer outages
- Very strong inverter headroom
- Best for “I don’t want it to trip” buyers
Tip: If your fridge has a brutal startup surge, even a full battery can trip a weak inverter. Surge rating matters as much as Wh.
Yes — sometimes.
A fridge isn’t a constant load. It cycles on and off. The tricky bit is the startup surge when the compressor kicks in.
This guide helps you avoid the two classic mistakes: 1) buying too small (and it trips), or 2) buying huge “just in case” (and it empties your wallet).
The three numbers that matter
1) Fridge running watts (usually modest)
Many fridges run around 50–150W when the compressor is running.
But it’s not running 100% of the time.
2) Fridge startup surge (can be spicy)
When the compressor starts, it can briefly pull 3–7× the running watts.
That’s why a power station can run: - laptops - lights - routers
…but still face-plant on a fridge.
3) Power station inverter rating (W)
Look for: - continuous output (W) - surge/peak output (W)
If the surge rating is too low, the power station will trip even if the battery is full.
How big a power station do you need?
Output (watts)
As a very rough guide for “typical fridge, typical UK home”: - Aim for 1000W+ continuous output - And 2000W surge (or better)
Some fridges will work on less. Some won’t. Appliances are like that.
Capacity (Wh)
Capacity determines runtime.
Rule of thumb: - A fridge might average 30–80W over time (because it cycles)
Runtime estimate: - Runtime (hours) ≈ (battery Wh × 0.8) ÷ average W
Examples: - 512Wh → usable ~410Wh - 410Wh ÷ 50W ≈ 8 hours - 1024Wh → usable ~820Wh - 820Wh ÷ 50W ≈ 16 hours
Real life varies with: - how full the fridge is - room temperature - door opening (stop “just checking” — it’s not a pet)
Ways to make it work better (without buying a bigger battery)
1) Don’t run the fridge 24/7
During an outage, many people do “interval cooling”: - run fridge for 30–60 minutes - then off for a while
Keep doors shut and you’ll get more mileage.
2) Cool the fridge before the storm
If you know bad weather is coming: - turn the fridge a bit colder beforehand - freeze ice packs
This gives you thermal buffer.
3) Run essentials separately
If your power station is borderline, don’t also run: - kettle (no) - toaster (absolutely not) - space heater (nice try)
Keep router/phones/lights on it, but be realistic.
Safety notes (quick, non-boring)
- Portable power stations are generally safe indoors.
- Generators are not (carbon monoxide risk). If you’re thinking generator, read: generator vs power station (coming soon)
- Use a proper plug connection — don’t invent new electrical standards in your kitchen.
What to buy
If you want models that are actually plausible for fridges, see:
Next reads
Some links on this page are affiliate links. This means we may earn a commission if you buy through them, at no extra cost to you.
FAQ
PCRQuick answers to common questions.