UPS backup power
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APC Back-UPS 850VA
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Power cut hitting your home solar setup? The APC Back-UPS 850VA keeps a NAS or home server running just long enough for a clean, safe shutdown.
- Power: 850 VA / 520 W
- Outlets: 8, 6 battery-backed
- Runtime: Up to 9 min at 260 W
- USB ports: 2 (USB-A + USB-C) fast charge
- 8 outlets, fast USB-C, 3-year warranty
The APC Back-UPS 850VA (BE850G2-UK) is an off-line UPS built to protect fixed electronics from mains power cuts and surges. With 8 outlets (6 battery-backed, 2 surge-only), two fast USB ports (Type-A and Type-C) and a protected network port, it keeps a NAS, a home server tied to a solar setup, or a router running through a brief outage or a clean shutdown. Runtime is rated up to around 9 minutes at moderate load, backed by a 3-year warranty.
After a few weeks running behind our office NAS, wired into the same circuit as our solar setup, this APC just gets on with the job quietly. During a ten-second mains dropout, the NAS didn't even blink: instant switchover, no reboot. On a longer cut, the audible alarm gives plenty of warning to trigger a clean shutdown before the battery runs flat. The 8 outlets are well laid out, and being able to plug a USB-C cable straight into the UPS to top up a phone during an outage is more useful than it sounds. The one real downside: runtime drops fast as you approach full load, so don't expect to keep working through a long cut, just to shut everything down safely. For the price, the 3-year warranty is a genuine edge over most rivals.
APC Back-UPS 500VA
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Mains dropout or surge at the campsite? This compact APC UPS keeps a router, a Starlink dish or a NAS protected in a van, on a boat or at home.
- Power: 500 VA / 300 W
- Outlets: 3 IEC C13 outlets
- Regulation: AVR (no battery drain)
- Network: Line protection up to 1 Gbit/s
- AVR, universal IEC outlets, compact
The APC Back-UPS BX500MI is a compact UPS built to protect fixed network equipment from mains power cuts and surges. With 3 IEC C13 outlets, automatic voltage regulation (AVR) and network line protection up to 1 Gbit/s, it keeps a router, a Starlink dish or a small NAS running in a van, on a boat or on shore power, through a brief glitch or a clean shutdown. Compact tower format, replaceable battery, around £80.
Running behind our van's Starlink router for a few weeks now, this little APC keeps a low profile, which is exactly what you want from it. On the small voltage dips you get from a campsite hookup, the AVR soaks them up without even switching to battery, saving runtime for a genuine outage. The tower format is genuinely compact, tucking easily into an electrical locker without hogging space. The one catch for mobile use: the 3 outlets are IEC C13, not standard wall sockets, so your router or dish needs to already use that type of cord, or you will need an adapter. Runtime stays modest, a few minutes at normal load, plenty to ride out a brief glitch or shut down cleanly, not to keep working off-grid for long. For protecting sensitive network gear on a budget, it does the job without fuss.
APC Back-UPS Pro 650VA
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Protecting a NAS wired to your solar setup or a Starlink dish on the road? The APC BR650MI adds an LCD screen and 1 Gbit/s network protection.
- Power: 650 VA / 390 W
- Screen: LCD (charge, load, mode)
- Outlets: 6 IEC C13, AVR
- Network: Protection up to 1 Gbit/s
- LCD screen, fast USB-C, 1 Gbit/s network
The APC Back-UPS Pro BR650MI is a line-interactive UPS built to protect a NAS, a home server wired to a solar setup, or a router and its Starlink dish in a van or on a boat. With 650 VA, 6 battery-backed IEC C13 outlets, an LCD screen (missing on the Back-UPS 500VA and 850VA already reviewed), 2 USB-C/USB-A ports and network protection up to 1 Gbit/s, it secures fixed electronics from outages and surges. Around £170, 2-year warranty.
Running behind a small Synology NAS wired to our solar setup, this BR650MI stands out straight away from the two other APC units we tested, thanks to its LCD screen: one glance tells you battery charge and load, instead of guessing from a blinking LED. On the mains micro-blips we get on darker winter evenings, the AVR soaks up the voltage dips without even switching to battery, saving runtime for a real outage. The 1 Gbit/s network protection is reassuring with the NAS wired over Ethernet: a surge riding in on the cable gets filtered before it reaches its ports. The only downside is modest runtime, a few minutes at full load, plenty for a clean NAS shutdown, not for carrying on working off the mains. For anyone wanting a step up from a basic UPS, with a real status screen, this BR650MI clearly does the job.
Eaton 3S 700 (Gen 2)
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Power cut? The Eaton 3S 700 Gen 2 switches your NAS or home lab to battery in an instant, with 8 outlets and 2 USB charging ports.
- Power: 700 VA / 420 W
- Outlets: 8x BS (4 battery-backed + 4 surge-only)
- Runtime: ≈6 min at full load, 9 min at 50%
- Ports: 2x USB-A charging (2A) + USB software
- 8 outlets, silent, 2 USB charging ports included
The Eaton 3S 700 (Gen 2) is a backup UPS built to protect a home lab or a NAS connected to a residential solar setup from mains power cuts and surges. With 700 VA and 420 W of continuous power, its 8 BS outlets (4 battery-backed, 4 surge-only) let you split a NAS, network switch and router across the most important sockets. Silent in operation, it packs 2 USB-A charging ports and clean-shutdown software for extended outages.
Fitted under our home network rack, the 3S 700 Gen 2 keeps a NAS, switch and router running through short outages without a hitch. The 8 outlets, split across 2 rows, make it much easier to fit several bulky power bricks side by side without them fighting for space, a real step up from the previous generation's 6 sockets. During a deliberate power cut test under load, the switch to battery was instant, with no NAS reboot and no dropped connection. The 2 USB-A ports are handy for topping up a phone or a spare 4G dongle straight off the unit. Once installed on the NAS, the monitoring software correctly triggered a clean shutdown a few minutes into the outage. One honest downside: at full 420 W load, runtime drops to around 6 minutes, just enough for a clean shutdown rather than riding out a long outage. For a small home lab, a hard combination of outlet count and price to beat.
CyberPower CP1500EPFCLCD-UK
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Got a NAS with an active PFC power supply? The CyberPower CP1500EPFCLCD-UK delivers a true pure sine wave on battery, where a standard UPS can struggle to match it.
- Power: 1500VA / 900W
- Output wave: Pure sine wave
- Outlets: 2x UK + 4x IEC, all battery-backed
- Runtime: ≈11 min at half load, 3 min at full load
- Pure sine wave, compatible with active PFC power supplies
The CyberPower CP1500EPFCLCD-UK is a 1500VA / 900W backup UPS built for demanding fixed equipment: a NAS, home server, router or Starlink dish connected to a residential solar setup. Its defining feature is a pure sine wave output on battery, identical to mains power, unlike the simulated sine wave used by many consumer UPS units, which can upset some active PFC power supplies found in servers and NAS units. An LCD display, AVR voltage regulation and USB monitoring software round out the package.
We plugged the CP1500EPFCLCD-UK into our NAS and a small home server with an active PFC power supply, the kind of setup where a budget UPS can make the power supply audibly complain the moment it switches to battery. Not here: the pure sine wave means the server barely notices the difference between mains and battery, no odd fan noise or power supply error message. The LCD screen is clear and cycles automatically through the useful readings (load, runtime, voltage). During an outage test, the switch was instant and silent. The one catch: at full load, runtime drops fast to about 3 minutes, so this is one to pair with the USB monitoring software for an automatic clean NAS shutdown rather than relying on a long runtime. A UPS clearly built for power quality rather than endurance, which is exactly what a demanding NAS or small server owner is after.
Eaton Ellipse ECO 650 USB IEC
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Power cut? The Eaton Ellipse ECO 650 USB IEC switches your NAS or router onto battery in milliseconds, completely silently, with no fan noise at all.
- Power: 650 VA / 400 W
- Outlets: 4x IEC C13 (3 battery-backed + 1 surge/RJ45)
- Runtime: ≈5 min at full load, 9 min at 50%
- Design: Silent, fanless
- Completely silent, EcoControl saves up to 20%
The Eaton Ellipse ECO 650 USB IEC is an entry-level backup UPS built for fixed electronics that cannot tolerate even a brief power cut: a NAS, router or Starlink dish connected to a residential solar setup. With 650 VA and 400 W of continuous power, it switches to battery in milliseconds, with zero fan noise thanks to its fully passive, fanless design. The EcoControl function trims secondary peripheral power draw too, for up to 20% energy savings.
Fitted under our router and a small backup NAS, the Ellipse ECO 650 USB IEC keeps its main promise: you genuinely never hear it, even under full load, unlike the Ellipse PRO 1200 sitting right next to it. During a deliberate power cut test, the switch to battery was instant, with no reboot on either the router or the NAS. Runtime stays modest, around 5 minutes at full load, plenty of time for the USB monitoring software to trigger a clean shutdown rather than to ride out a long outage. The slim case tucks away easily under a desk or behind a router. One real downside: 4 outlets cap how many devices you can protect at once, and only one outlet really benefits from RJ45 surge protection. For a router, a modem or a small standalone NAS, this level of silence makes it a genuinely smart, more than adequate pick.
Eaton Ellipse PRO 1200
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Power cut? The Eaton Ellipse PRO 1200 switches your NAS or home server to battery in milliseconds, for a clean shutdown with zero data loss.
- Power: 1200 VA / 750 W
- Outlets: 8x IEC C13 (4 battery-backed + 4 surge-only)
- Runtime: ≈15 to 20 min at moderate load
- Display: LCD + USB monitoring software
- Near-instant battery switchover, automatic clean NAS shutdown
The Eaton Ellipse PRO 1200 IEC is a backup UPS built for fixed equipment that cannot tolerate even a brief power cut: a NAS, home server, router or Starlink dish connected to a residential solar setup. With 750 W of continuous power, automatic voltage regulation (AVR) and an LCD display, it switches to battery in milliseconds and gives your NAS time to shut down cleanly thanks to the included USB monitoring software. Rated runtime of 15 to 20 minutes at moderate load.
We set up the Ellipse PRO 1200 under our NAS rack, replacing a basic extension lead. First impression: the LCD screen is genuinely handy, showing load and remaining runtime in real time instead of leaving you guessing. During a deliberate power cut test (breaker switched off under load), the switch to battery was instant, without so much as a blink on the NAS side. The USB monitoring software correctly triggered a clean NAS shutdown a few minutes into the outage, exactly as intended. One honest downside: the cooling fan is clearly audible whenever the unit is under load, and noticeably louder right after a power cut, which can be distracting in a quiet home office. Tucked away in a utility room or cupboard with the NAS, it is simply not an issue. Overall, a solid, no-nonsense UPS, best kept in a room where fan noise will not bother anyone.
Tecnoware Era Plus 650VA
£45.00
A budget UPS to protect a router, modem or camera? The Tecnoware Era Plus 650VA is silent and cheap, but currently not sold on the UK market.
- Power: 650 VA / 455 W
- Runtime: 10 min PC, 30 min modem
- Outlets: 2 Schuko (EU standard)
- Noise: < 40 dB(A) at 1 m
- Silent AVR, low price, Schuko sockets (EU-only)
The Tecnoware Era Plus 650VA (FGCERAPL652SCH) is a budget line-interactive UPS built to protect a router, a modem, a CCTV camera or a small NAS from outages and surges. AVR Plus technology, fan-less silent operation, runtime rated up to 10 minutes with a PC and 30 minutes with a modem. It ships with 2 Schuko outlets, the continental European standard, not UK wall sockets. Around £45 equivalent on the continent; not currently sold on the UK market.
Widely sold as a budget line-interactive UPS across continental Europe, this small Tecnoware protects a router, a modem or a CCTV camera without fuss, exactly what you want at this price point. The AVR Plus soaks up small mains fluctuations without switching to battery, and the fan-less silent operation is genuine, not just a marketing line. The two outlets are Schuko sockets, the round two-pin standard used across most of continental Europe, not the three-pin type G socket used in the UK, and no UK-plug version is currently listed by any UK retailer. There is also no USB port or monitoring software, so it cannot trigger an automatic clean shutdown of a PC on a longer outage. For a simple job, protecting a router, modem or camera on the continent, it does that job honestly at a hard-to-beat price.
