Battery Backup for a Router and NAS

For a battery backup for a router and modem, choose the APC Back-UPS BE600M1: its five battery-backed outlets suit a small network that needs to stay powered. For a NAS and small homelab, choose the CyberPower CP1500PFCLCD, subject to NAS compatibility: sine-wave output, a USB data port and greater output capacity make it our preferred starting point. Choose runtime from your measured load, then configure the NAS to stop safely before the battery runs out.

Quick picks: continuity or NAS protection?

These are US AC models. APC's official US product page and CyberPower's current product page provide the comparison below.

For router continuity, prioritize the required runtime and usable outlet spacing. For a NAS, add a verified shutdown data link and enough time to stop services. Output watts tell you whether the UPS can carry the load; they do not specify how long it will run.

Best for a router and modem: APC Back-UPS BE600M1

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The BE600M1 has seven outlets: five battery-backed and two surge-only, with 600 VA / 330 W limits. APC lists a standby topology, stepped sine-wave approximation, floor/wall mounting and a user-replaceable APCRBC154 battery. It is our straightforward choice when the job is keeping essential network boxes powered.

Put every essential adapter on a battery-backed outlet. A surge-only socket does not supply outage power. Check the physical fit of your power bricks before counting all five backed outlets as usable.

USB and model trap: the shared APC manual identifies a USB charger and a separate data port on the BE600M1. Its similarly named BN650M1 lacks the data port; the manual distinguishes that model from the BN650M1-CA. Buy by the complete model code, especially if you might add NAS shutdown later.

Choose the CyberPower instead when sine-wave output or its higher capacity is a requirement. APC's manual acknowledges that some connected equipment may not accept the BE600M1's stepped waveform. Neither its USB data port nor its capacity alone establishes compatibility with your NAS.

Check the BE600M1 configuration at APC / Schneider Electric.

Best for a NAS and small homelab: CyberPower CP1500PFCLCD

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The currently listed US version supplies 1500 VA / 1000 W, sine-wave battery output and automatic voltage regulation (AVR). CyberPower says AVR corrects minor power fluctuations without using the battery and explicitly lists active-PFC power-supply compatibility. Its HID-compliant USB data port makes it a candidate for supported NAS shutdown; check your NAS maker's compatibility information before ordering.

Confirm the hardware: the current page and datasheet specify 12 outlets, six backed and six surge-only, plus Type-A and Type-C charging sockets. The linked manual calls its specification-table model CP1500PFCLCDa and says five UPS outlets, although its operation text says six. Confirm the rear-panel layout of the supplied unit; the documentation does not settle that discrepancy.

Plan space for a 24.9 lb mini-tower with two widely spaced outlets; check adapter fit before buying. Replacement batteries also depend on the serial-number prefix, according to CyberPower's page. Its RJ45 surge-protection path is specified for 10/100/1000 Ethernet; for multi-gig equipment, keep Ethernet directly connected between network devices. Those surge-protection jacks are separate from optional network management.

Check the exact CP1500PFCLCD at CyberPower.

Inventory the boxes, then draw both cable paths

Trace the connection from the modem or ONT to the router, then through any required switch to the NAS and access point. Hitron's CODA56 manual, for example, connects the modem by Ethernet to the router's WAN port and powers each separately. Include a remote mesh node if you need coverage there during the outage; a UPS beside the gateway is not a power source for another room.

For PoE, include the switch or injector that supplies the access point or camera. Netgear's GS308EPP page explicitly describes powering those devices through Ethernet. When measuring the switch's complete AC input with its PoE devices active, count that reading once.

1. 1

   AC input

   Grounded wall outlet → UPS, following its manual.

2. 2

   AC output branches

   Battery-backed outlets → each original AC adapter → modem or ONT, router, required switch or access point, and NAS. These are parallel power connections.

3. 3

   Shutdown signal

   UPS data port → NAS USB port. For network UPS clients, keep the intervening switch powered too.

Synology specifically requires the switch or hub carrying network UPS messages to share UPS power. Keep a remote ONT's location in the inventory: it needs backup where its own power supply is installed. Our modem vs router guide helps identify the boxes; NAS choices for home covers the storage side.

Fill in a load worksheet before choosing runtime

Record the original PSU's output voltage, current, connector and polarity; for USB-C, check the supported power profiles. Keep the original AC adapters on the UPS. Do not assume a phone-charging socket or an unverified mini DC UPS can replace them.

The existing eero Pro 7, Hitron CODA56 and Synology DS225+ are useful examples of why labels and consumption need separate columns:

References: Hitron specifications, eero PSU, eero consumption and Synology specifications. These are manufacturer figures, not readings of your installation.

Add your measured AC readings with the equipment doing its normal work, and check startup demand as well. A PSU's rated output is not an actual AC consumption measurement. Stay within both watt and VA limits: Schneider Electric explains that neither may be exceeded. Leave headroom for changing loads and additions; CyberPower's manual recommends keeping load below 80% of rated capacity.

Read the exact manufacturer's runtime curve

Open the CP1500PFCLCD's Runtime tab or CyberPower runtime calculator and select that exact model. Its current curve gives approximately 100 minutes at 50 watts, 66 minutes at 100 W and 30.8 minutes at 200 W. CyberPower qualifies the curve as based on new, fully charged batteries under normal conditions; age, charge and environment change the result.

• 50-watt load100min
• 100-watt load66min
• 200-watt load30.8min

Source: CyberPower manufacturer curve data; approximate, new fully charged batteries

Use your complete backed-up load on the curve. Do not extrapolate those points into promised hours for a smaller router load, or transfer them to another UPS. APC's BE600M1 page has a load-specific runtime widget with a 33–330 W input range; seek manufacturer guidance if your load falls outside the available curve.

For a NAS, the required runtime must cover your chosen standby delay, the time it takes to stop safely, and reserve. For router continuity, choose the outage duration you want to cover and verify it at the actual load. Shutting down the NAS changes the shared UPS load, so a constant-load curve cannot promise an exact combined runtime afterward.

Set up NAS shutdown without cutting off the router

In Synology DSM, connect the UPS data cable, open Control Panel → Hardware & Power → UPS, enable UPS support and select USB UPS. Check Device Information, set the time before Standby Mode, and apply. Standby Mode stops services and unmounts volumes; file serving does not continue in that state.

Synology recommends consulting its compatibility list before purchasing peripherals. A HID port establishes a data capability, not approval for every NAS, operating system or hardware revision. Confirm detection, the battery event and the complete shutdown sequence on your own combination before leaving it unattended.

Follow the UPS manual's battery-connection and initial-charging instructions. Run Synology's documented outage simulation and check recovery when utility power returns; review Restart automatically after a power failure if you want the NAS to restart automatically.

What happens if the ISP loses power?

A powered router cannot repair an upstream outage. Comcast says its network requires commercial power. Verizon says its Battery Storage Unit supports voice only, excluding internet and TV. Back up the ONT's normal supply rather than assuming its voice battery covers broadband.

Before ordering, complete this final check:

• Yes: Exact US model, regional plug and battery-backed outlet layout confirmed
• Yes: Every essential powered box and adapter included; both output limits leave headroom
• Yes: Manufacturer curve checked at your load and desired runtime
• Partly: NAS shutdown depends on exact-device support, detection and configured behavior
• No: Surge-only outlets, USB charging sockets and an ISP voice battery do not substitute for the required backup and data paths

How we choose

This is a manufacturer-documentation comparison, checked November 2, 2026. No physical or runtime tests were performed for this guide. We prioritize network power paths, usable backed outlets, load-specific curves, waveform requirements and documented shutdown interfaces. The CP1500PFCLCD outlet discrepancy remains explicit; neither pick carries a blanket NAS-compatibility claim. See How we choose for our editorial method.

Verdict

Get the BE600M1 for a small router/modem setup after checking its curve and adapter fit. Choose the CP1500PFCLCD for a NAS or small homelab needing its sine-wave output and higher capacity, after confirming the supplied hardware and shutdown support. The purchase is complete only when every necessary box has backed power and the NAS shutdown policy preserves the network runtime you want.

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