Best UPS for Modem and Router (2026)
To keep home internet up through a short outage, we’d buy the CyberPower CP1500PFCLCD. Its six battery outlets cover the modem, router and anything else on the network shelf, and its sine wave output suits a desktop sharing the shelf. For outages that run for hours, skip the UPS and get a power station.
Our Picks at a Glance
| Unit | Rating | Battery Outlets | Switchover | Published Runtime | Warranty | Price | |
|---|---|---|---|---|---|---|---|
| CyberPower CP1500PFCLCD | 1500VA / 1,000W, sine wave | 6 (plus 6 surge only) | 4 ms | 10 min at half load | 3 years, battery included | ~$239.95 | CP1500PFCLCD on Amazon |
| APC BE600M1 | 600VA / 330W, waveform not stated | 5 (plus 2 surge only) | Not published | 23 min at 100W | 3 years | ~$83.99 | APC BE600M1 on Amazon |
| EcoFlow DELTA 3 Classic | 1,024 Wh / 1,800W | 3 AC | 10 ms | About 14.6 hours at 40W* | 3 years, plus 2 with app registration | ~$499 | DELTA 3 Classic on Amazon |
*Our estimate for a 40W network, using the planning formula from Bluetti’s Apex 300 manual: capacity times 0.855, divided by the load plus about 20W of self-consumption. EcoFlow publishes no runtime at this load, so treat it as a planning figure. The two UPS figures are the makers’ own.
Work Out Your Network’s Load First
Look at the power adapters for your modem, router and any fiber terminal or mesh node. Each label lists volts and amps; multiply them for the adapter’s maximum watts. A 12V, 2A modem adapter tops out at 24W, and a 12V, 1.5A router adapter at 18W, so that pair can’t pull more than 42W together. Real draw usually sits below the label, since the adapter is rated for the device’s peak.
Every unit here is rated for at least 330W against that 42W ceiling, so the choice comes down to runtime and outlets, and both UPS makers publish runtime only at loads well above a router’s. APC rates the BE600M1 for 23 minutes at 100W; CyberPower rates the CP1500PFCLCD for 10 minutes at half its 1,000W rating. Both will run a 40W network longer than that, but neither maker gives a figure at that load, and battery runtime doesn’t scale in a straight line, so we won’t multiply it out for you.
Our Picks
CyberPower CP1500PFCLCD
It runs on two 12V, 9Ah sealed lead-acid batteries. Output is a sine wave on battery as well as on the grid, transfer takes 4 ms, and automatic voltage regulation corrects small sags without draining the battery. Six battery outlets cover a modem, router, fiber terminal and a desktop for a clean shutdown. CyberPower’s 3-year warranty includes the battery.
Best for: Keeping internet, a home office PC or a NAS up through short outages.
Skip if: Space or weight matters; it’s a 24.9 lb mini tower, 14 inches deep.
APC BE600M1
APC markets the BE600M1 for keeping a computer, Wi-Fi and router running, and its 23 minutes at 100W means a 40W network gets more. Five outlets carry battery backup and two are surge only. The USB port keeps charging a phone during an outage. When the battery wears out, you swap in APC’s APCRBC154 instead of replacing the whole unit.
Best for: Riding out flickers and short outages for the least money.
Skip if: You need a runtime you can plan on; APC publishes none at router loads, and a power station gives you one.
EcoFlow DELTA 3 Classic
EcoFlow lists a 10 ms UPS switchover for the DELTA 3 Classic. On a 40W network our estimate is about 14.6 hours, so a modem and router stay up from evening to morning on one charge. It’s about 27 lb, and it recharges from the wall to 80 percent in 45 minutes.
Best for: Working from home through outages that run for hours.
Skip if: Your outages are brief; a UPS does that for a fraction of the price.
UPS or Power Station?
The DELTA 3 Classic holds 1,024 Wh, against the roughly 216 Wh nominal in the CyberPower’s two 12V, 9Ah batteries, and costs about twice as much. If outages where you live run for hours, that money is better spent on the power station; our best battery backup for small homes guide covers the next sizes up, and how much battery backup do I need shows the math.
How We Picked
We compared output rating, battery outlets, switchover time, published runtime and warranty for a home network load. UPS specs come from CyberPower’s product page and APC’s Amazon listing; the DELTA 3 Classic’s come from EcoFlow’s product page. Prices were read on Amazon on October 25, 2026. We have not tested these units hands-on. Our editorial policy explains how picks are made.