Best Eaton UPS
Updated: October 2026
You want one Eaton for a UK house that still uses ordinary 13 A plugs, and the listing with the most reviews is not that model. The best Eaton UPS in this amazon.co.uk set depends on the plug on the device, not on which row shows 4.5 from the larger number. Prices and stars are the 19 October 2026 snapshot on the [Eaton UPS comparison](/hub/electrical-equipment/eaton-ups). We did not run a brownout in a lab. A qualifying purchase can earn a commission at no extra cost to you.
You want one Eaton for a UK house that still uses ordinary 13 A plugs, and the listing with the most reviews is not that model.
You want one Eaton for a UK house that still uses ordinary 13 A plugs, and the listing with the most reviews is not that model. The best Eaton UPS in this amazon.co.uk set depends on the plug on the device, not on which row shows 4.5 from the larger number. Prices and stars are the 19 October 2026 snapshot on the Eaton UPS comparison. We did not run a brownout in a lab. A qualifying purchase can earn a commission at no extra cost to you.
Our top picks
| Badge | Product | Sockets | Watts | Reviews | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  Eaton Eaton 5E900UI 900 VA | 4 IEC C13 | 480 W | 4.5 from 125, outside UK | 9.2 | about £118.57 | View offer |
 Eaton Eaton 3S700B 700 VA | 4 of 8 BS battery-backed | 420 W | 4.5 from 58, UK-heavy | 9.2 | about £124.06 | View offer | |
 Eaton Eaton 3S Mini 36 W | One DC barrel | 36 W | 3.6 from 190, UK text | 7.4 | about £53.99 | View offer |
On this page
What best means here
Best on this page means the Eaton in this seven-row set that matches a UK plug and a shutdown of a few minutes, with a review sample you can actually place in the United Kingdom. It does not mean the highest star count. The 5E900UI is 4.5 from 125 reviews at £118.57. The 3S700B is 4.5 from 58 reviews at £124.06. The 125-review score does not outrank the 58-review score for a British socket, because the review text behind the 125 is from outside the UK.
The second pick is best value on a stated condition: more watts and a lower price than the 3S700B, if IEC leads are acceptable. The decision order sits on the Eaton UPS buying guide.
Top pick for UK plugs
The top pick for a house full of UK plugs is the Eaton 3S700B, ASIN B0B3RSK9BD. Eaton’s GB page rates it at 700 VA and 420 W, offline, with four BS outlets on battery and four BS outlets that are surge-only, plus HID USB. The amazon listing matches that socket split, at £124.06. UK review titles dominate the sample. The 15-minute runtime field is a standard figure, not a promise for your PC.
Skip it if the street voltage sags, because this listing does not claim automatic voltage regulation. Eaton’s own 3S700B page says Input: UK and then, in the input table, Schuko. The amazon plug attribute says Type B. Socket types are on Eaton UPS UK sockets.
Best value if you can use IEC
The best value in this set, if you can use IEC leads, is the Eaton 5E900UI, ASIN B0CCNXHBHG, at £118.57. The amazon title is 900 VA and 480 W, line-interactive, with USB and shutdown software named. The en-GB 5E datasheet is the source for 900 VA / 480 W and for a typical one-PC figure of about 24 minutes. Treat 24 minutes as typical for the load Eaton had in mind, not as your gaming PC.
The plug attribute says no plug. There is no BS 1363 outlet on this listing. Skip it if you wanted the BS part number. That part is the 5E900UB, and it is not the ASIN in this comparison. The price advantage over the 3S700B is about £5.50 on this snapshot. The larger difference is 480 W against 420 W.
Who should buy neither
Several rows are the right product for a different question. The 3S Mini at £53.99 is 36 W DC for one barrel-plug device. It keeps a modem or an ONT up in UK reviews, and it cannot run a PC. The 3P700I at £118.61 is 4.5 from two reviews. That is a single household, not a reason to prefer it over 58 UK-heavy reviews on the 3S700B when you need British sockets.
The 5E2200UI at £376.32 is the spend when the load is near 1,200 W. For a home office under 420 W, that price does not buy a better answer than the 3S700B. A router and an ONT are a different job, on Eaton UPS for router.
Common questions
Which Eaton in this set suits a house full of UK plugs?
The 3S700B is the only title here that describes BS outlets, four of them battery-backed and four surge-only, at 420 W and £124.06. The review sample behind its 4.5 from 58 is largely United Kingdom. You still check the input lead, because Eaton’s page mentions Schuko and the amazon attribute says Type B. Every other AC model in the set is IEC C13 on the output.
Why is the cheaper 5E900UI not automatically the best value for a UK flat?
It is cheaper by a few pounds and it offers 480 W rather than 420 W, which is a real step if your leads are IEC. In a flat where the PC, the monitor, and the router all have BS 1363 plugs, you then buy leads or adapters, and you still do not have BS sockets on the UPS. The 4.5 from 125 reviews is not a British owner score in the sample we read.
Who should skip the 3S700B?
Skip it if the supply sags and you need automatic voltage regulation, because this listing does not claim it. Skip it if the load is over 420 W, or if more than four devices must stay on in the cut. The offline topology is a limit, not a hidden feature. One owner’s software trouble is a reason to try the USB shutdown while you can still return the unit.
Does 4.5 from two reviews on the 3P700I outrank 4.5 from 58?
No. The 3P700I’s 4.5 is two reviews, one of them a UK owner on a small ONT and router load. The 3S700B’s 4.5 is 58 reviews with UK titles in the sample, at the same 420 W and a BS-outlet title. Two reviews can be honest and still be too few to carry the pick. The 3P also carries a Type C plug attribute and IEC outlets.
Can the top pick ride through a brownout without the battery?
The 3S700B listing does not claim that. It is an offline UPS. Brownout correction without the battery is the line-interactive claim, which in this set sits on the 5S bullets and on the 5E datasheet, not on the 3S. If your lights dip before a full cut, the top pick for UK plugs is the wrong tool. Do not add a feature the listing never stated.
Related pages
Sources
Public sources from the research digest, last checked on 19 October 2026. Shelf prices and star lines are the amazon.co.uk figures in the display file.
- Eaton 5E Gen2 datasheet (en-GB) (retrieved 19 October 2026)
- Eaton UK UPS buying guide (retrieved 19 October 2026)
- Eaton 3S700B product page (retrieved 19 October 2026)
- Eaton 5S550IBS product page (retrieved 19 October 2026)
- Eaton 3S Mini catalogue page (retrieved 19 October 2026)
- BSI: BS EN IEC 62040-3:2021 (retrieved 19 October 2026)
- Electrical Equipment (Safety) Regulations 2016, regulation 35 (retrieved 19 October 2026)
- GOV.UK: Electrical Equipment Safety Regulations 2016 (retrieved 19 October 2026)