- 20W
- while running
- 480Wh
- used over a full day
- 15 of 15
- models we track can run it
- Lightest with a 10 ms switchoverJackery Explorer 300 v212.2 hr$299Check price
- Best to expand laterEcoFlow River 3 Plus12.2 hr$299Check price
- Best for multi-day outagesBluetti AC7032.6 hr$359Check price
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Runtime for every model
| Model | Runtime | Capacity | Output | Weight | Price | Per Wh |
|---|---|---|---|---|---|---|
| EcoFlow River 3 | 10.4 hr | 245Wh | 300W | 7.8 lb | $239 | $0.98 |
| Jackery Explorer 300 v2 | 12.2 hr | 288Wh | 300W | 8.2 lb | $299 | $1.04 |
| Anker Solix C300 | 12.2 hr | 288Wh | 300W | 9.1 lb | $249 | $0.86 |
| EcoFlow River 3 Plus | 12.2 hr | 286Wh | 600W | 10.4 lb | $299 | $1.05 |
| Bluetti AC70 | 32.6 hr | 768Wh | 1,000W | 22.5 lb | $359 | $0.47 |
| EcoFlow Delta 3 Plus | 43.5 hr | 1,024Wh | 1,800W | 27.6 lb | $669 | $0.65 |
| Jackery Explorer 1000 v2 | 45.5 hr | 1,070Wh | 1,500W | 23.8 lb | $499 | $0.47 |
| Anker Solix C1000 Gen 2 | 43.5 hr | 1,024Wh | 2,000W | 24.9 lb | $499.99 | $0.49 |
| Bluetti Elite 100 V2 | 43.5 hr | 1,024Wh | 1,800W | 25 lb | $489 | $0.48 |
| EcoFlow Delta 3 Max | 3.6 days | 2,048Wh | 2,400W | 44.8 lb | $879 | $0.43 |
| Jackery Explorer 2000 v2 | 3.6 days | 2,042Wh | 2,200W | 39.5 lb | $899 | $0.44 |
| Anker Solix C2000 Gen 2 | 3.6 days | 2,048Wh | 2,400W | 41.7 lb | $899.99 | $0.44 |
| Bluetti Elite 200 V2 | 3.7 days | 2,073Wh | 2,600W | 53.4 lb | $899 | $0.43 |
| EcoFlow Delta Pro 3 | 7.3 days | 4,096Wh | 4,000W | 113.5 lb | $2,799 | $0.68 |
| Anker Solix F3800 | 6.8 days | 3,840Wh | 6,000W | 132.3 lb | $1,979.99 | $0.52 |
Shaded rows are our picks. Assumed load: A cable modem and a Wi-Fi router pulling 20W together, left on around the clock.
What a modem and router draw
The modem is the box that connects your home to the internet line. The router is the box that makes the Wi-Fi. Together they pull about 20W in our numbers.
The label on each power adapter shows the most it can ever supply, not what the box uses hour to hour.
Because these boxes run around the clock, the small number adds up. 20W for 24 hours is 480 watt-hours. A watt-hour is a unit of energy: one watt used for one hour. After losses, a full day of internet takes about 565Wh out of the battery.
Why real runtime will be lower than the table
A power station stores DC power, the kind a battery holds. The inverter is the part that turns it into the AC power a wall outlet gives. The inverter uses some power just by being switched on, like a car engine idling at a red light.
Our math takes a flat 15% off for AC losses. That is fair for a big load. With a 20W load, the idle draw is a much larger share of the total, and most makers do not publish it for small units.
Here is what that can mean. If the inverter needed 5W for itself, the station would be supplying 25W in total, and a listed 12.2 hours would land closer to 10. Treat the table as the best case and plan on less.
Switchover speed is the spec that matters
UPS stands for uninterruptible power supply. The station plugs into the wall, and the modem and router plug into the station. Wall power passes through until the grid fails, and then the battery takes over.
The handover is not instant. The gap is listed in milliseconds, which are thousandths of a second. If the gap is too long, the modem restarts, and a restarting modem can take a few minutes to get back online.
A shorter gap gives the modem a better chance. The Anker Solix C300, Jackery Explorer 300 v2 and EcoFlow River 3 Plus list 10 ms. The Bluetti AC70 and EcoFlow River 3 list 20 ms. The River 3 is the lowest-priced unit in the table at $239, but EcoFlow’s own US store was not listing it when we checked, so stock may be limited.
Nobody publishes how long a given modem can ride through a gap, so none of these is a promise.
What a power station cannot fix
Your internet also depends on your provider’s equipment out in the neighborhood, and that equipment needs power too. If it goes dark, your modem can be powered and still have no connection. Nothing inside your house fixes that.
Cable and fiber networks are built differently, and how long each stays up in an outage varies by provider and area.
Setting it up
Plug in every box between the wall jack and your Wi-Fi. With fiber service there is often a separate small box where the line enters the house, and it needs power as well.
A mesh system has extra units around the house. Only the ones plugged into the station stay on.
A 1,000Wh unit lists about 43.5 hours on this load. That only makes sense if the station is also doing other jobs, which the power outage guide covers.
The picks in detail
Anker Solix C300
- 12.2 hr
- Wi-Fi router and modem
- $249
- $0.86 per Wh
- 9.1 lb
- Weight
For this job the two numbers that matter are hours and switchover time, and the C300 does well on both. It lists 12.2 hours at 20W, enough for an evening outage and the night after it. Its 10 ms UPS switchover ties for the fastest here, and at $249 it is the lowest-priced unit with that speed. One catch: it was sold out at Anker's own store when we checked, so you may need another retailer.
What fits
- 12.2 hours at 20W
- 10 ms UPS switchover
- $249, the lowest price with a 10 ms switchover
What does not
- Sold out at Anker's own store when we checked
- 300W outlet limit rules out adding a fridge
Sold out at Anker's own store when we checked. The price shown is its last list price.
Jackery Explorer 300 v2
- 12.2 hr
- Wi-Fi router and modem
- $299
- $1.04 per Wh
- 8.2 lb
- Weight
This matches the Anker on the two numbers that matter here: 12.2 hours at 20W and a 10 ms UPS switchover. At 8.2 lb it is also the lightest unit with that switchover speed. The cost is $299, which is $50 more than the Anker and $1.04 per watt-hour. That makes it the one to buy if you cannot find the Anker and do not need the EcoFlow's expansion.
What fits
- 12.2 hours at 20W
- 10 ms UPS switchover
- 8.2 lb
What does not
- $299, or $1.04 per watt-hour
- $50 more than the Anker C300 for the same hours
This model replaced the Explorer 300 Plus. Jackery rates its 4,000 cycles to 70% capacity, not 80%.
EcoFlow River 3 Plus
- 12.2 hr
- Wi-Fi router and modem
- $299
- $1.05 per Wh
- 10.4 lb
- Weight
This is the small unit that can grow. It starts at 286Wh and 12.2 hours, the same as the Anker, with the same 10 ms switchover. Add-on batteries take it up to 858Wh, three times the capacity, which would roughly triple the hours. Its 600W outlet rating is double that of the other small units. It costs $299 and has sold for far less during sales.
What fits
- 10 ms UPS switchover
- Expandable up to 858Wh with add-on batteries
- 220W solar input, the most of the small units
What does not
- $1.05 per watt-hour at its regular price
- 10.4 lb, the heaviest of the small units
This is EcoFlow's regular price. It has sold for far less during sales.
Bluetti AC70
- 32.6 hr
- Wi-Fi router and modem
- $359
- $0.47 per Wh
- 22.5 lb
- Weight
If your outages last more than a night, the small units run out and this one keeps going. The AC70 lists 32.6 hours at 20W. At $359 it costs $0.47 per watt-hour, roughly half the rate of the small units. That is $110 more than the Anker C300 for about 2.7 times the hours. The trade is size and speed. It weighs 22.5 lb and its switchover is 20 ms.
What fits
- 32.6 hours at 20W
- $0.47 per watt-hour
- Refills to 80% in 45 minutes
What does not
- 20 ms switchover
- 22.5 lb is a lot of box for a 20W job
Coupon deals well under this price have appeared.
Verdict
Buy the Anker Solix C300 if you want the modem to stay up through a typical few-hour outage with the least chance of a reboot. If it is out of stock, the Jackery Explorer 300 v2 does the same job for $50 more. Choose the EcoFlow River 3 Plus if you might add batteries later, and the Bluetti AC70 if your outages run past one night. Skip the EcoFlow River 3 for this job. It saves $10 over the Anker but has fewer hours and a 20 ms switchover.
How these numbers were worked out. Runtime = battery capacity × efficiency ÷ average watts. We use 85% efficiency for AC outlets and 90% for DC and USB ports, because some energy is lost as heat on the way out. A model is marked "can't run it" when the device needs more watts than the outlet gives, or a bigger startup surge than the unit is rated for. Your own device may draw more or less than our assumed load, so treat these as estimates. Prices were checked on 2026-10-04 and change often. Full method
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