Back UPS 950VA - BX950MI - UPS Battery Backup & Surge Protector, Backup Battery with AVR, Dataline Protection, Uniterruptible Power Supply, Black

Very useful during power cuts and the often short power cuts (2 seconds etc). Not as efficient as the newer switched mode UPS's but good enough.

I've been using APC for the last 25+ years and their products have never let me down. Living out in the sticks our mains supply is prone to short power cuts, so we've purchased a couple of these for our desktop computers. They do the job, really easy to set up and use, I like the ability to turn off the sounder on the fly. Good value for money too.

ABSOLUTELY stay away from this product. There is no UK power cable in the box so you need the buy a new power cable also There is no UK plug outlet on the back of the product so you need the buy a converted UK plug. I purchased the 2 products in the photo to run the product. AND THEN It DIDN'T WORK. I tried 3 different power cables and the product definitely DID NOT WORK. I had to return all the products I purchased. This product is just a waste of time. A product that is unexpectedly bad from APC. Also, it is definitely not a UK compatible product. I don't understand why it is sold in the United Kingdom in this condition. Do not buy this product. Try alternatives.

I got this to power my QNAP NAS in case the power goes out. From best to worst - it looks quite nice and as a unit for sitting under a tv, doesn't stand out but the light is a little bright. - USB support is excellent and doesn't need anything special to work out of the box. the qnap saw it straight away and started using it plus my windows pc saw the battery as soon as i plugged it in and started acting like a laptop, which is excellent and allows you some very special power management based on percent of charge and if the power goes off. - When the power goes out, while it isn't full sine, it's not quite as aggressive as some of the other units i've used. you can still hear that it's not full sine but it doesn't sound like it's wringing the neck of the devices connected to it. - Run time is acceptable, i've gotten 10 minutes out of it with more to spare (with about 200w load) and for my use that's all i need, i can't comment on full run time but as this unit uses lead acid batteries i wouldn't ever recommend running them completely flat as that will damage them. - This unit does run quite warm, the AVR circutry seems to give off a fair bit of heat so if you're putting it in a cupboard make sure that there's a fan blowing some air over the unit, i don't think i'd like to see what would happen if the lead acid batteries start boiling. and the worst - You can't change the batteries yourself, i'm sure you can order the replacements but the actual unit is designed in such a way that it's not trivial to replace the batteries, which in my eyes is just stupid. for something that will last max 3 years, that's a poor move from APC and doesn't inspire confidence. for me that's not a big thing as i will be upgrading to another full sine unit in the future but that still leaves a bad taste in my mouth. i wish i knew this before i brought the unit because it's just as important to be able to service the unit as is the quality of how it works. Overall, you'll be well served by the unit for low priority stuff and the USB support is excellent, just a shame about the batteries.

Bought a BX950MI unit for my pc workstation and monitor. Easy to set up. Comes with a IEC C13 to C14 cable (kettle type plug, male to female) and usb cable. I bought an additional cable for my monitor. Downloaded powerchute software from manufacturers website to set-up and monitor the UPS. Using Win11 do get a User Account Control message every time I want to open the software GUI (dont seem to be able to set an exception) - this isn’t a problem though, just a little annoying. The software does load on startup. Next day had a blackout within my neighbourhood! (quite rare occurrence, maybe once a year). UPS did it's stuff and it set my PC to hibernate (power off). Little annoyances (1) green strip lights on front are a bit bright (as other reviewers have mentioned -black tape will help), (2) pressing of power button is accompanied by rather loud beep - not sure if I can turn this off in the software. Power draw is 20-30 W while PC is on and UPS on full battery. Device can be turned off with 2(?) second button press so will do this after ive switched PC off. Very pleased with the purchase so far.

I bought this unit to replace a 25 year old UPS unit that had failed due to a momentary external Line-Earth mains fault. I was attracted by APC's boast of the “950” having a highly desirable "AVR" feature, in addition to it's UPS function. UNFORTUNATELY (and I suspect it may be the AVR feature which is responsible for) the high quiescent SB Power consumed by the '950 UPS' unit. After the 'Stand By' lead acid accumulator is fully charged, there should be only a very low dc cell maintenance current at a fixed constant voltage applied to this battery, and the current essentially then should be so small as to be virtually undetectable from outside the UPS Unit. SADLY the top cover of the “950” UPS becomes quite warm to the touch, even after the battery recharge is complete, which implies a significant amount of energy is being consumed in Stand By. Unsurprisingly my external mains monitor Test Unit is measuring a ludicrously high quiescent input of 39VA with a 'Power Factor' of 0.5, which registers as 20Watts of POWER! Such a statistic is truly appalling, and implies an on-going and continuous operating cost of several pence per day, which would certainly not be insignificant over the several year projected operational life of the UPS. I am drawn to suspect the claimed mains "Automatic Voltage Regulator" function of this 950 Unit as a possible cause of this wasted energy. With a competently designed AVR (=Automatic Voltage Regulator), the UPS output voltage should be essentially constant, regardless of the input mains voltage fluctuations. It would appear that this claimed "AVR" feature has been VERY poorly implemented, and is (probably) no more than a simple relay selected tapping on an internal buck/boost transformer when the mains input rises ABOVE, or BELOW, two pre-set threshold points. When the nominal 230V ac input voltage is varied below approximately 200V or above 250V, the 'click' of an internal relay is heard to operate, and there is a step function attempt to INCREASE or REDUCE the UPS output voltage accordingly. WHAT THERE IS NOT appears to be any subsequent degree of vernier finesse of these ‘coarse switch-selected corrections’, which remain in operation until the input mains voltage deviations drift nearer to the nominal 230V, at which point the UPPER or LOWER coarse voltage correction is de-selected via a further audible 'click'. The UPS Inverter only seems to contribute to the "950" Unit's mains output when the mains input voltage is ludicrously low, below around 100V! or ACTUALLY absent, and it then switches in to provide a stepped (crude-sine-like) waveform with an RMS output voltage suitable for powering a PC or monitor etc. Pleasingly, the UPS Inverter’s switch mode pulsed output (shown in the photo peaking to well over 300V) displays as an almost exact 240V RMS 50Hz output, which is excellent. As a matter of fact the Unit's Manual specifically states that the inverter's output is NOT suitable for driving 'motor type' loads, such as Garage Doors. Equally however, it appears that the UPS' Inverter is NOT used to provide any correction, or compensation for mains voltage fluctuations that do not trigger either the 'high' or 'low' voltage thresholds. Consequently small mains voltage variations (generated for testing in this case, by manually varying the output voltage from a supply Variac) ARE NOT either detected, or indeed COMPENSATED FOR, with the result that the UPS Unit's output ALSO CONTAINS THESE UNCORRECTED VARIATIONS too! The “950” Manual advises these two voltage thresholds are Factory Preset, but does provide some information as to how these two voltage thresholds may be adjusted. I would venture to suggest that APC’s claim that the "950 UPS Unit" PROVIDES AUTOMATIC VOLTAGE REGULATION, is not literally correct, as there appears to be no attempt to provide vernier-like voltage trimming of the Unit’s looped mains output. ONLY as quoted earlier, a crude switch selected element of coarse correction. In view of the facts that the "AVR" function of the "950" unit appears (from what I have seen) to be a far-fetched and tenuous claim, and the ludicrously high quiescent power that the Unit gobbles, when effectively doing nothing, and the fact too that the Lead Acid Gel battery could be being continuously cooked and damaged, when it should be on the lightest of float charges. For a sealed gel battery of this type, the 3 year life endurance mentioned in the documentation seems very meagre, and possibly the result of poor float charge management - I would have anticipated nearly double this for this intermittent type of service. Whilst an IEC mains extension cable and USB leads were included inside the very efficiently packed "950" unit, the 4 self adhesive feet that SHOULD have been included too, were NOT! So the entire weight of the UPS is born on the 4 delicate 'cups' on the unit's base with a risk of scratching the shelf/desk beneath, rather than distributed across the (missing) 4 rubber or plastic sticky feet. I propose to return this Unit to Amazon for a full refund.

Good quality and reliable. Has provide greate availability for key PC and wifi equipment during power outage.

Bought this 2 years ago to serve as a battery backup for my router, Wi-Fi AP and to give my NAS some security so it could shut down safely. It has a USB port which works well with the Synology NAS without any real configuration, whereas other UPS' I was looking at at the same price did not. I calculated that it could potentially run those devices for 1-2 hours without too much issue. Otherwise the unit is fairly basic, and it uses IEC connectors so you will potentially need to buy new cables and so on to actually connect to it. The BX950MI I used has several battery backup outlets and a few merely surge protected ones, but that's fine, and the relatively small size of the unit happened to fit in well with my network setup. So far, all good, and for the money, a decent unit. Where I've deducted stars is because after 22 months, the battery unit on mine is completely dead, which is much sooner than expected - I expected 3-5 years before needing replacement. This is a shame, but what really frustrated me is the unit did not make this easy to understand. One day I saw the lights on the unit were constantly flashing, but there was no audible tone, which didn't match the "replace battery" warning in the manual. I experimented with it to try and resolve whatever issue it was over the course of a full evening, where the warnings were not clear, until it eventually settled on the replace battery error, which is the flashing light AND a continuous tone. Problem was I could not get the tone to silence using the physical controls, and it only stopped after bringing down a laptop and installing the associated desktop app and connecting via USB. Here in fairness in the software it clearly indicated the battery needed replacing, but it was frustrating and highlighted how clunky the controls are on this particular series. Overall, it does what is says, but the whole point of a UPS is to avoid damage and have less downtime, and I've had more downtime trying to understand the issues it was having than I would have had by not having it at all.

Have 2 of these, uze 1 as a back up to my UGreen 6800 Pro NAS and when I plugged in the included USB cable it was immediatly and correctly identified. The otherone backs up my routers and switches, Both working flawlessly.

Livraison rapide , arrivé en bonne état et installation rapide et facile. Cet onduleur remplace un existant mais il est beaucoup plus silencieux. Content de mon achat

Provengo da una lunga storia di UPS APC - sia quelli entry level che i Pro - e finora sono tutti durati molto più del previsto. In particolare, questo ha sostituito un modello di pari capacità che si è guastato dopo ben 7 anni di carriera! Io lo uso per alimentare uno switch ethernet D-Link a 5 porte, un access point Unifi, il Raspberry Pi5 che mi gestisce la domotica e un NAS a 2 dischi, perciò parliamo di un carico piuttosto modesto (probabilmente non arriviamo manco a 100W complessivi). Lo scopo è proteggere questi dispositivi dai classici sbalzi di tensione e tenerli accesi in caso di blackout di durata modesta. Appena arrivato l'ho lasciato in carica senza dispositivi connessi per più di 16h (come indicato nel manuale) e l'ho messo a dimora verso le 8 del mattino. Alle 9.00 è saltata la corrente ed è tornata verso le 10.25, e lui ha mantenuto online i dispositivi senza mai spegnersi. Dalle curve di scarica pubblicate sul sito APC mi aspettavo durasse meno, perciò ha superato le mie aspettative. Ho potuto lavorare tutto il tempo come se niente fosse. L'unica lamentela che rivolgerei ad APC è che nella confezione troviamo un cavo IEC maschio-femmina e un cavo USB ma non quello di alimentazione. Per fortuna avevo ancora quello del vecchio, sennò sarei dovuto uscire a comprarlo. Che senso ha non mettere almeno il cavo per la 220?

prima product. voldoet geheel aan de beschrijving. Accu was geladen dus het apparaat was direct operationeel. Software werkt ook goed

Die Installation ist denkbar einfach, auspacken, gelben Akku-Verbindungsstecker umklappen und einstecken, einschalten, fertig. Das Gehäuse wird handwarm, das ist aber normal und liegt anscheinend an der verwendeten Akku-Technologie. Ca. 15W habe ich als Leerlaufverbrauch ohne angeschlossene Last gemessen. Die Kaltgeräte-Anschlüsse sind für meinen Zweck ideal, die Stromversorgung eines Synology-NAS soll damit hauptsächlich sichergestellt werden. Per beiliegendem USB-Kabel habe ich die USV mit dem NAS verbunden, sofort wurde sie erkannt, die von dem NAS geschätzte Batterielaufzeit ist fast eine Stunde. Bei sinkender Batteriekapazität der USV fährt der NAS automatisch herunter, Datenverlust wird somit vermieden. PC, Router, Switch, etc. können mit dieser USV natürlich auch noch einige Zeit betrieben werden. Für mich ist diese USV die ideale Vorsorge für Stromschwankungen oder kurzfristige Netzausfälle.