Best UPS for NAS: Keep the lights on when the power goes out

No power supply is continuous. Even the most reliable connections can cease to function due to hardware-related issues, bad weather, or vandalism. Losing power from the national grid can wreak havoc on your network-attached storage (NAS) if it shuts down unexpectedly. This is where an uninterruptible power supply (UPS) comes into play. It can provide additional protection to your NAS and keep it running long enough to safely shut down.

What is a UPS?

An uninterruptible power supply is precisely as the name implies. It’s a power supply that ensures the supply of power to connected hardware is not interrupted by a sudden loss from the national grid. An internal battery pack provides power should the device detect a power loss. How long the UPS is capable of maintaining power output depends on the battery capacity.

More affordable UPS devices come with smaller battery packs that will only keep a NAS online for a few minutes before having to shut down. More expensive units will not only have larger batteries, but also additional outlets, ports, and even the ability to share data with a NAS. By connecting the UPS to a NAS with a data connection, the UPS can tell the NAS how much battery is left and have it safely shut down.

It’s not just a NAS the UPS can provide power for. Anything with a compatible cable will be able to connect to and draw from the device. When it comes to desktop computers, it’s important to consider the maximum output of the UPS. A 500 W UPS will only be able to support 500 W of power being drawn. A gaming PC can take as much as 1000 W, which would overload the UPS. A NAS will barely hit 50 W, let alone meet any of the capacities of my recommended power supplies.

Why you should buy a UPS for NAS

A NAS needs to shut down safely to ensure no loss of data. A sudden power outage will simply cut power to the device as if you pulled the lead by accident. This is where a UPS can help. Should power be cut to the device, it will start providing power to the NAS (and other hardware) immediately. If power returns, the UPS will simply switch supplies and begin charging.

The NAS can then be configured to shut down when the UPS reaches a certain battery level, if available. Not all UPS units support this feature, so the NAS will need to be turned off manually if this is the case. Above all else, a UPS provides peace of mind that should anything happen to the grid in your area, you’ll have enough time to shut everything down and protect your hardware and data.

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My top UPS picks for NAS

CyberPower CP1500PFCLCD

Best UPS for NAS

CyberPower CP1500PFCLCD
CyberPower CP1500PFCLCD. (Source: CyberPower)

CyberPower’s CP1500PFCLCD is a seriously powerful UPS with a high capacity of 1000 W and plenty of ports and sockets to hook up everything in your office. It’ll keep your NAS and networking equipment up and running for a while before safely shutting the server down.

Capacity1500 VA / 1000 W
BatterySLA (replaceable)
Outlets12 (6 connected to battery)
Ports4x RJ45
1x USB-B
1x Serial
1x USB-A
1x USB-C
DisplayLCD
Dimensions99 x 279 x 356 mm
Weight11.29 kg
Warranty3 Years
  • 1000 W capacity offers good uptime
  • 6 sockets connected to the battery
  • Good selection of ports
  • LCD shows various data
  • Pricey

The CyberPower CP1500PFCLCD is one of the best uninterruptable power supplies to buy for a home office with a NAS. You’ll be able to take advantage of the 1500 VA battery pack to power the NAS for a good while before needing to shut it down. With six sockets connected to the battery, you could also power the router and network infrastructure to remain online through power loss.

This makes the CP1500PFCLCD a good pick for those who work from home. Being able to continue working on a portable device such as a laptop while the rest of your area falls off the grid is worth the asking price. The LCD is great for showing important data regarding the UPS and the various ports allow the device to share data with other systems and even charge smaller devices.

CyberPower ST900U

Best value UPS for NAS

CyberPower ST900U
CyberPower ST900U. (Source: CyberPower)

My recommendation for the best value UPS would be the CyberPower ST900U. It’s compact, does everything you need a UPS to do, and has very little in terms of advanced features to help keep the price low. It’s a great pick for powering a NAS.

Capacity900 VA / 500 W
BatterySLA
Outlets12 (6 connected to battery)
Ports1x USB-B
2x USB-A
Display
Dimensions310 x 79 x 178 mm
Weight3.49 kg
Warranty3 Years
  • 500 W capacity offers good uptime for lighter devices
  • Compact design for easier deployment
  • 6 sockets connected to the battery
  • Not too many ports
  • No display
  • Non-replaceable battery

This SLA-powered CyberPower ST900U is a compact UPS with six battery-connected outlets for keeping systems online. A 900 VA capacity isn’t the highest around, but this also isn’t the most expensive UPS available. Three USB ports allow the device to communicate with a NAS and charge some portable devices.

Where this UPS falls short compared to other recommendations is the lack of a display, fewer ports for connecting devices, and the fact the battery cannot be replaced. Once the battery pack has reached its end of life, a new UPS will need to be purchased, though CyberPower still backs this device with its three-year warranty.

APC BX1500M

Best UPS for the office

APC BX1500M
APC BX1500M. (Source: APC)

Have a router, switch, low-powered PC, and a NAS To keep online? The APC BX1500M is ready to go with plenty of available power and outlets. There are even two coaxial connections and some networking with an LCD to keep you updated with important information.

Capacity1500 VA / 900 W
BatterySLA (replaceable)
Outlets10 (5 connected to battery)
Ports3x RJ45
2x Coaxial
DisplayLCD
Dimensions100 x 250 x 382 mm
Weight11 kg
Warranty3 Years
  • 900 W capacity offers decent uptime
  • LCD shows various data
  • 5 sockets connected to the battery
  • Not too many ports
  • Pricey

If my top recommendation isn’t quite what you’re after, I’d suggest taking a look at APC’s BX1500M. This has similar specifications, a slightly lower price, and can’t handle as much power draw as the CyberPower CP1500PFCLCD. That’s not to say this is a bad UPS as it has plenty going for it. There’s a good LCD upfront, five outlets connected to the battery pack, and a replaceable 1500 VA unit.

Having two coaxial and three RJ45 connections is a nice touch, but it would have been good to have a single USB port to share data with a connected device, be it a PC or NAS. Regardless, the BX1500M is a solid UPS with enough power to keep you online for a decent period before running out of juice.

CyberPower CP750LCD

Best UPS for home office

CyberPower CP750LCD
CyberPower CP750LCD. (Source: CyberPower)

Something more reasonable from CyberPower includes the CP750LCD. It’s more compact than the APC pick I’d suggest for the office, making this a better buy for those working from home. It has everything you need to keep your NAS and PC online for a while.

Capacity750 VA / 420 W
BatterySLA
Outlets8 (4 connected to battery)
Ports3x RJ45
1x USB-B
DisplayLCD
Dimensions264 x 175 x 79 mm
Weight3.03 kg
Warranty3 Years
  • 420 W capacity good for network hardware
  • LCD shows various data
  • 4 sockets connected to the battery
  • Not too many ports
  • Non-replaceable battery
  • Lower capacity

Do you find yourself working from home on the company laptop and using a NAS to store some data? This UPS is for you! The CyberPower CP750LCD is a compact power supply with enough outlets to keep a laptop and NAS online with networking hardware connected. There’s even a USB port to connect the UPS to the NAS and have it share battery-level data.

The battery isn’t user-replaceable and you will have to deal with the lower 750 VA capacity, but it will happily keep you going for many minutes through a power outage.

Amazon Basics UPS 600VA

Best budget UPS for NAS

Amazon Basics UPS 600VA
Amazon Basics UPS 600VA. (Source: Amazon)

This is the most basic UPS in my collection of recommendations, but it’s worth buying if you’re on a tight budget but need something to provide some power to your devices during power outages.

Capacity600 VA / 360 W
BatterySLA
Outlets8 (4 connected to battery)
Ports
Display
Dimensions272 x 155 x 80 mm
Weight2.99 kg
Warranty3 Years
  • 360 W capacity is good for shutting the NAS down and running a router
  • Budget-friendly protection against power outages
  • 4 sockets connected to the battery
  • No ports
  • Non-replaceable battery
  • Lower capacity

Amazon makes some great hardware on a budget and the retailer’s Amazon Basics UPS 600VA is no exception. This is a well-priced UPS with eight sockets, four of which are connected to the battery. Being a cheap UPS, there are no USB ports for sharing data with other hardware, nor is there a display to show important UPS data.

Like some other more affordable power supplies, Amazon does not allow the battery to be replaced, and while the overall capacity is lower than most UPS, it’s a great choice for low-powered devices such as networking equipment. Just be ready to turn off your NAS should you be at the location and notice a power loss.

FAQ

Which battery type is best for UPS?

There’s no wrong answer for choosing the battery type. The most important factor in choosing a UPS for a NAS is the capacity, especially when looking to connect other devices to the battery supply. The battery type determines how long the battery will last before needing replacing (if available), and specific considerations for operation.

The most common battery type for UPS is sealed lead acid (SLA). Lithium-Ion is a modern type that’s considerably more expensive but should last longer than SLA batteries.

How much capacity do you need?

A UPS has two values when looking at capacity. VA stands for volt-amps and determines how much power can be stored inside the battery and released to other devices. The higher the VA the longer the battery will be able to keep everything online.

W stands for watts and represents how much power the UPS can handle, exceeding this value will cause the unit to shut down.

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