What Can a 1000Wh Solar Generator Run? Runtimes for Common Appliances

A 1000Wh solar generator (portable power station) delivers roughly 850 usable watt-hours to AC appliances after inverter losses. That runs a typical ENERGY STAR full-size refrigerator for about 16 hours, a 30 W CPAP for three or more nights, or a Wi-Fi router for over a day. It will run a 1,500 W heater for only about half an hour.

How much power does a 1000Wh solar generator actually deliver?

Not the full 1,000 Wh. Converting battery power to household AC loses some energy as heat. EcoFlow’s runtime guide suggests multiplying capacity by 0.80 to 0.90 for AC loads.

We use the middle of that range, 0.85, for every runtime on this page:

Runtime (hours) = 1,000 Wh x 0.85 ÷ appliance watts

So 850 Wh is the working number. DC loads, like USB or 12 V outputs, bypass the inverter and typically run longer.

Runtime table: what a 1000Wh solar generator can run

Each figure below is an estimate from the formula, not a measurement. Your appliance may draw more or less.

Appliance	Watts used	Where the watts come from	Estimated runtime on 850 Wh
Full-size refrigerator	about 52 W average	ENERGY STAR median, 457 kWh/yr	about 16 hours
Top-freezer refrigerator	about 41 W average	ENERGY STAR median, 363 kWh/yr	about 20 hours
Compact refrigerator	about 28 W average	ENERGY STAR median, 244 kWh/yr	about 30 hours
CPAP	30 W average	EcoFlow sample test log	about 28 hours (3.5 nights)
Modem, router and phone charging	25 W average	EcoFlow sample test log	about 34 hours
One LED bulb (1,100 lumens)	as little as 9 W	DOE lighting guide	about 94 hours
Ceramic space heater on high	1,500 W	Lasko 754200 listing	about 34 minutes
1,200 W microwave	more than 1,200 W from the outlet	Panasonic lists 1,200 W cooking power	under 43 minutes of total cooking

Fridge averages come from our analysis of the ENERGY STAR certified refrigerator dataset in September 2026: annual kWh ÷ 365 ÷ 24 hours. Those are lab ratings, and a warm kitchen or frequent door openings raise real use.

Why the refrigerator number is lower than its label

A fridge label shows a higher wattage than our table. A U.S. Department of Energy lesson explains that nameplate ratings are the maximum draw, and a refrigerator only uses that amount while the compressor runs. The compressor cycles on and off, so the daily average is far lower.

That cycling still matters for sizing. Each time the compressor starts, it draws a brief spike, which the power station’s surge rating must cover. All three 1 kWh models we compared list surge or peak figures of 2,700 W or more.

Can a 1000Wh solar generator run a microwave or coffee maker?

It depends on rated output more than capacity. Panasonic lists 1,200 W of cooking power for its NN-SN686SR microwave, and a microwave draws more than its cooking power from the outlet. Check the nameplate for input watts and compare it with the station’s rated AC output.

Short cooking sessions do not use much energy. Five minutes at 1,200 W is 100 Wh, before losses. GE notes that lower microwave power levels work by cycling the magnetron on and off, so they cut average draw but not the peak.

What a 1000Wh solar generator cannot do well

• Heat a room. A 1,500 W heater uses the full battery in about half an hour.
• Run central air, a water heater or an electric range. These need 240 V circuits or far more energy than a portable unit holds.
• Carry a full-size fridge through a 24-hour outage by itself. At the median rating it falls about 8 hours short, unless you add solar recharging. Our refrigerator and freezer sizing guide shows how many panels close that gap.

For outage planning beyond these limits, follow the step-by-step method in what size solar generator you need, or compare larger units in what a 3000 watt solar generator will run.

How to get more runtime from 1000Wh

1. Use DC outputs for phones, routers and CPAPs that accept 12 V. EcoFlow notes DC output typically extends runtime compared with AC.
2. Recharge during the day from solar panels or a vehicle.
3. Cut standby loads. Switch off the AC inverter when nothing needs it.
4. Keep the fridge closed and full. Fewer openings mean fewer compressor cycles.
5. Consider a larger or expandable unit. EcoFlow lists the DELTA 3 Plus as expandable to 5 kWh with extra batteries.

1 kWh class solar generators on eBay

Browse current portable power stations on eBay, new condition only, from $200.

Shop portable power stations→

• 1000Wh and up
• LiFePO4
• With solar panel

Opens eBay in a new tab. Check condition, seller feedback and returns on the listing.

Which 1000Wh solar generator should you pick?

Weight, output and warranty separate the three we compared. The Jackery Explorer 1000 v2 is the lightest at 23.8 lb. The BLUETTI AC180 holds the most energy at 1,152 Wh. The EcoFlow DELTA 3 lists the highest surge at 3,600 W.

See the full breakdown in EcoFlow vs Jackery vs Bluetti. If you plan to cycle the battery often, read LiFePO4 vs NMC batteries before buying an older NMC model.