Run-times
What Can a 1000Wh Power Station Run?
A 1000Wh power station is the most popular size for emergencies and camping, big enough to be genuinely useful, small enough to carry. Here is exactly what it can run, for how long, and the one-line formula so you can work out any device yourself.
The only formula you need
Run-time (hours) = usable watt-hours ÷ device watts.
A 1000Wh station does not give you a full 1,000 usable watt-hours, because the inverter loses some energy turning battery DC into AC. Plan on about 850 usable watt-hours. So a 50W device runs roughly 850 ÷ 50 = 17 hours. That is the whole trick.
Run-times for common devices
Based on about 850 usable watt-hours from a 1000Wh unit:
| Device | Typical watts | Run-time on 1000Wh |
|---|---|---|
| Phone charge | 10W | ~60+ full charges |
| Laptop | 50W | ~17 hours |
| LED lights (room) | 20W | ~42 hours |
| Wi-Fi router + modem | 15W | ~56 hours |
| CPAP (no humidifier) | 40W | ~21 hours (2-3 nights) |
| Small fridge (avg) | 50W | ~16-18 hours |
| TV (40-inch LED) | 60W | ~14 hours |
| Box fan | 50W | ~17 hours |
| Microwave | 1,000W | ~50 minutes |
| Space heater | 1,500W | ~30 minutes |
Notice the pattern: low-watt electronics run for many hours, while anything that makes heat empties the battery fast. A 1000Wh station is a champion for keeping the essentials alive, not for cooking or heating.
A real-world emergency scenario
Picture a one-day power outage. You want to keep the basics running:
- Fridge: 50W × 18h = 900Wh worth of demand (cycled), realistically ~400Wh
- Phones: 30Wh
- Router and modem: 15W × 8h = 120Wh
- Lights at night: 20W × 5h = 100Wh
That is roughly 650Wh of demand against your 850 usable watt-hours. A single 1000Wh station gets a small household through a day of essentials, and a folding solar panel recharging it during daylight can extend that to a multi-day outage.
Recommended gear
If you are shopping for a backup unit, our roundup of the best power stations for emergencies compares the popular 1000Wh-class options by what they can actually run. To pair one with panels and keep it topped up, see our minimalist build and the System Builder.
The hero products in this class are the 1000Wh power station and a folding panel:
Check Power Station Price on Amazon Check Folding Panel Price on Amazon
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Frequently Asked Questions
How long will a 1000Wh power station run a fridge?
A typical small fridge averages about 50W once you account for the compressor cycling on and off, so a 1000Wh unit runs it roughly 16 to 18 hours after losses. A larger fridge will be less. Recharging with solar during the day can keep it going indefinitely.
Can a 1000Wh power station run a CPAP all night?
Yes, easily. Most CPAPs draw 30 to 60W without the humidifier and heated hose, so a 1000Wh station covers 2 to 3 nights of CPAP use. Turn off the humidifier to stretch it much further.
Why can't I use all 1000 watt-hours?
Converting battery DC into wall-outlet AC through the inverter loses some energy as heat, usually around 10 to 15 percent. So plan on about 850 to 900 usable watt-hours from a 1000Wh unit, not the full 1000.
What can it NOT run?
High-heat appliances are the limit. Space heaters, hair dryers, microwaves, and electric kettles draw 1,000 to 1,500W and would drain a 1000Wh unit in well under an hour, if its inverter can even handle the surge. Power stations are best for electronics, lights, fans, fridges, and medical gear.