Topology first, then the gap between the VA figure and the watt figure · review

APC Back-UPS BE850G2-GR, 850 VA with no watt figure anywhere on the page review

An eight-hundred-and-fifty volt-ampere unit with eight sockets and a single bullet, whose page carries no watt figure, no runtime, no waveform and no description of the battery.

By Jean-Benoit Buisson

The bottom line The highest socket count in this batch and the thinnest specification: one rating, in volt-amperes, with no watt figure to size a load against. Everything that separates one unit from another on this shelf — topology, waveform, runtime, battery — is absent from the page.

On the listing

An uninterruptible power supply rated at 850 VA with eight Schuko outputs and surge protection, sold under a range name with the reference printed in the title; and one bullet, which repeats the 850 VA rating, gives the mains voltage as 230 V and names USB Type-C and Type-A charging ports.

850 volt-amperes, and no watt figure

One rating, and it is the larger of the two. Volt-amperes measure apparent power; watts measure the real power a load consumes. The watt figure is always the smaller and it is the one everything plugged in has to fit inside, which is why it is the number a unit is sized on. It is not on this page. The ratio between the two depends on the power factor the maker assumes, and the eight listings here pair their figures at several different ratios, so nothing about 850 VA fixes what the watt rating would be. The site prints what the page prints and leaves the other half missing.

Eight sockets, counted as one group

Eight outputs is more than any other listing in this batch counts, and the title gives them as a single number. On units of this shape the outputs are ordinarily divided: some carry the battery and the surge protection, the rest carry surge protection only. Which socket is which is normally printed on the case itself. Counted together, as here, the number says how many plugs fit and not how many keep working through a cut.

Charging ports, and what a communication port does

USB Type-C and Type-A, named as charging ports. They deliver power outwards, to a telephone or a tablet. A communication port does the opposite: it carries the state of the unit into a computer, so software can see the mains fail, watch the battery fall and shut the machine down before it empties. Three pages in this batch name a port of that kind, one of them naming two. This page names none, and the USB sockets it does name are not a substitute for one.

Before ordering

Ask for the watt rating, for a runtime in minutes at a stated number of watts, and for the split between battery-backed and surge-only sockets. The page answers none of the three, and the first of them is what decides whether the unit is large enough at all.

Availability

Priced from 110 € to 157 € across the German, French, Italian and Spanish Amazon stores the day this page was checked.

It is stocked on the British Amazon store as well, in that country’s own currency. The range above leaves those out: it counts euro stores and no others.

The American Amazon store returned nothing at all, so the buy button there opens a search in that country rather than a page that would not load.

Every figure in this section is what Keepa held on the day this page was last updated. Stock and prices move without warning.

Prices quoted in this text were read on 10 September 2026. The live price is at the top of the page.

Where it holds up, and where it stops

Strengths

Eight outputs, which is more than any other page in this batch counts, and the count is printed in the title rather than left to a photograph
Surge protection is named in the title beside the battery function, so both jobs of the unit are stated
The charging ports are counted and typed, which is a detail most listings on this shelf leave out

Compromises

No watt rating anywhere, so the one figure a load has to fit inside is missing from the page
The single bullet adds the mains voltage and the charging ports and repeats the rest of the title
Nothing says which of the eight sockets keep working once the mains fails

Specifications

Topology	Not published on the listing — the title gives the range name, the reference and the socket count, and the single bullet repeats the rating and the mains voltage. Neither says how the load is fed or what happens at the instant the mains stops, and no arrangement is read here from the name of the range
Stated classification	Not published on the listing — no classification code appears, and the page carries no topology for such a code to describe
VA rating	850 VA — printed in the title and again in the single bullet. It is apparent power, and it is the only power figure on the page
Watt rating	Not published on the listing — no figure in watts appears in the title or in the one bullet, so the rating a load is actually sized against cannot be read here. The 850 VA figure is apparent power and is not a substitute for it
Stated runtime at a named load	Not published on the listing — no time appears, and no load appears either, so there is neither a figure nor anything to attach one to
Output waveform	Not published on the listing — nothing says whether the output on battery is a sine wave or a stepped approximation
Socket count	Eight — printed in the title, which counts the outputs as a single group
Socket type	Schuko — printed in the title, alongside a mention of surge protection. How many of the eight carry the battery and how many carry filtering only is not stated
Battery type	Not published on the listing — no voltage, no amp-hour figure and no chemistry appears anywhere on the page
Battery replaceability	Not published on the listing — nothing says whether the pack is reached through a hatch or sealed inside the case
Communication port	Not published on the listing — the single bullet names USB Type-C and Type-A charging ports, which deliver power to a telephone or a tablet rather than carrying the state of the unit to a computer. A charging socket and a data socket are not the same fitting
Amazon reference	B081TKN3MZ (same reference on 5 Amazon marketplaces)
EAN	0731304347286

The questions that come up before an order

Can a watt rating be worked out from 850 VA?

Not from outside the page. The relation between the two is the power factor the maker assumes when the unit is rated, and the eight listings in this batch pair their figures at several different ratios: one gives 650 VA with 360 W, another 700 VA with 420 W, another 1500 VA with 1200 W. Any multiplication a reader performed would produce a number the maker never published. This site prints what the page prints and leaves the missing half visibly missing.

Why does it matter which sockets are battery-backed?

Because on units of this shape they are usually not all the same. A common arrangement gives some outputs the battery and the surge protection and the rest surge protection only, so a machine plugged into the wrong half stays protected against a spike and still goes dark at a cut. The title here counts eight sockets as one group. Which group each socket belongs to is normally printed on the case beside it, and this page does not say.