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Customer reviews of the Eaton 3S 450 FR (Gen 2)

Eaton 3S 450 FR (Gen 2) 89€95
Global rating
9/10
based on 115 reviews Editorial and moderation guide
  • 79%
    91 reviews
  • 10%
    12 reviews
  • 5%
    6 reviews
  • 3%
    3 reviews
  • 3%
    3 reviews
Most helpful positive review:
by SergeD
Posted on 24 Jun 2020

Perfect

Ok, I gave 10/10, because currently the product gives complete satisfaction. We will see how the product and its battery will age. I tried this product, because I already had other inverters of another brand. These other inverters worked perfectly for three, four or five years. Then they would start to "screw up". The unit would make a loud noise, even when none of the connected appliances were working (at 02:00, that's chi...). It was not a battery problem. To stop the noise, you had to unplug everything. In short, currently perfect, hoping that it will age well. Advantage between this inverter and the one that "disconnects", it's the same battery model.
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Most helpful critical review:
by JeromeL
Posted on 3 Sep 2025

But what is this "inverter" used for and where does it come from?

The product is not listed with EATON. The product simply doesn't work: you can plug appliances into it, but it doesn't protect them or prevent them from shutting down in the event of a power cut.
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      • by JeanChristopheF
        Posted on 27 May 2026
        Bought on 29 Apr 2026 from LDLC
        Number of reviews: 1 Average rating: 10

        Perfect

        Very good equipment, easy to use. Fulfills its function and it does not take up much space.

        Model: Eaton 3S 450 FR (Gen 2)
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      • by ChristianL
        Posted on 22 Apr 2026
        Bought on 24 Mar 2026 from LDLC
        Number of reviews: 2 Average rating: 6

        Very satisfied with the purchase for a NAS Synology DS 220+

        The UPS was automatically recognized by the Synology. I connected the Freebox, the alarm system and the Raspberry to it on battery backup. Phone and others on non-backup but protected from power surges. I didn’t test the power outage duration to know how long the whole setup was backed up. But generally these are sudden outages in winter due to a limit of my electricity subscription. For EDF outages of more than 15 min, I only expect a simple proper shutdown of the NAS.

        Model: Eaton 3S 850 FR (Gen 2)
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      • by GuilhemG
        Posted on 7 Apr 2026
        Bought on 10 Mar 2026 from LDLC
        Number of reviews: 3 Average rating: 7

        Protected power strip with battery

        A warm welcome in the shop.
        Staff available and approachable.
        Only small "hiccup", from time to time the device starts beeping and I don't know why.

        Model: Eaton 3S 700 FR (Gen 2)
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      • by Romain V.
        Posted on 5 Apr 2026
        Bought on 12 Nov 2025 from LDLC
        Number of reviews: 3 Average rating: 8

        A good inverter

        Spotted on the site beforehand, then purchased in-store depending on stock, sound advice from the LDLC staff on site, completely satisfied with my purchase.

        Model: Eaton 3S 550 FR (Gen 2)
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      • by Jepeto
        Posted on 27 Feb 2026
        Bought on 30 Jan 2026 from LDLC
        Number of reviews: 2 Average rating: 9

        Good product

        This UPS was easy to install.
        It is recognised and managed by the Synology server it protects.
        It worked well during two power outages caused by storms.
        It remains to be seen how long the batteries will last.
        I recommend it.

        Model: Eaton 3S 850 FR (Gen 2)
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      • by Olivier L
        Posted on 17 Feb 2026
        Bought on 19 Jan 2026 from LDLC
        Number of reviews: 2 Average rating: 10

        Top product

        Used to protect a NAS with a battery life of 42 minutes. At the moment, I am completely satisfied with the product.

        Model: Eaton 3S 550 FR (Gen 2)
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      • by Vincèn
        Posted on 10 Feb 2026
        Bought on 13 Jan 2026 from LDLC
        Number of reviews: 2 Average rating: 8

        Good product but old stock!!

        Perfect UPS for a desktop computer with accessories or to protect a small computer rack.
        The USB port allows you to monitor it from a computer (native support under Linux without a driver).
        The only major drawback: LDLC sends old stock with batteries that are not in great condition, but this is taken care of by Eaton!

        Model: Eaton 3S 850 FR (Gen 2)
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      • by manu
        Posted on 28 Jan 2026
        Bought on 31 Dec 2025 from LDLC
        Number of reviews: 3 Average rating: 10

        Simple and effective

        The inverter perfectly meets my expectations.
        Fast delivery, very easy to set up.
        A plus compared to my previous inverters: the beep signalling a power cut is audible without being unbearable!

        Model: Eaton 3S 550 FR (Gen 2)
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      • by AlainF
        Posted on 17 Jan 2026
        Bought on 20 Dec 2025 from LDLC
        Number of reviews: 1 Average rating: 10

        Purchase of UPS following repeated PC failures

        Following intermittent malfunctions with my tower, the technician detected an unfavourable electrical environment. Since connecting the PC to this UPS, I have not experienced any further malfunctions.

        Model: Eaton 3S 550 FR (Gen 2)
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      • by Daniel L
        Posted on 8 Jan 2026
        Bought on 10 Dec 2025 from LDLC
        Number of reviews: 1 Average rating: 10

        Perfect for my use

        Controlled UPS to protect an ASUS all-in-one integrated computer (also from LDLC). Two rows of sockets, which are more than enough for domestic use; one is protected by the battery, the other is protected from power surges. Well-made, well-designed and quiet. Seems robust, to be seen in use. For now, completely satisfied with the equipment, which offers good value for money.

        Model: Eaton 3S 700 FR (Gen 2)
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      • by SamB
        Posted on 1 Jan 2026
        Bought on 4 Dec 2025 from LDLC
        Number of reviews: 1 Average rating: 8

        Delivery problem

        Hello, everything is fine on your end, thank you. However, without ringing the bell (I was at home), the delivery driver left the parcel, with the box lid open (contents visible), in my garden 1 metre from the gate, visible from the street, in damp weather bordering on rain.
        I could have:
        - had the parcel stolen very easily,
        - claimed I hadn't received anything (I didn't sign for anything),
        - had my parcel damaged by the rain.
        Happy New Year to you.

        Model: Eaton 3S 850 FR (Gen 2)
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      • by AndreG
        Posted on 27 Dec 2025
        Bought on 28 Nov 2025 from LDLC
        Number of reviews: 1 Average rating: 10

        Friendly and efficient

        LDLC: four letters to remember, to be sure you're in the right place in the world of computing.
        The welcome is friendly, the advice is accurate, and so are the demonstrations.

        Model: Eaton 3S 850 FR (Gen 2)
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      • by Kinou
        Posted on 26 Dec 2025
        Bought on 28 Nov 2025 from LDLC
        Number of reviews: 1 Average rating: 10

        Very well

        Good product, easy to install.
        Can be used with socket covers.
        Wire length is adequate.

        Model: Eaton 3S 850 FR (Gen 2)
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      • by Christophe M
        Posted on 21 Dec 2025
        Bought on 22 Nov 2025 from LDLC
        Number of reviews: 18 Average rating: 10

        As expected

        Purchased to replace an APC UPS whose battery had died. The price of the battery was almost as expensive as this UPS. This one is also less bulky (for the same power).
        Ldlc took back my old device for recycling.
        So very satisfied with the purchase and the service provided.

        Model: Eaton 3S 550 FR (Gen 2)
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      • by RolandM
        Posted on 19 Nov 2025
        Bought on 21 Oct 2025 from LDLC
        Number of reviews: 1 Average rating: 10

        Effective

        This product is effective, as it proved to be up to the task following several micro power cuts. My appliances continued to work without a hitch. It also allows you to plug in eight electrical sockets, which is important and more than enough for me.

        Model: Eaton 3S 850 FR (Gen 2)
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      • by SebastienD
        Posted on 18 Nov 2025
        Bought on 1 Apr 2025 from LDLC
        Number of reviews: 5 Average rating: 10

        Good product that I recommend

        This is the 3rd one I've ordered for the family. It works perfectly well and fits neatly under a desk.

        Model: Eaton 3S 700 FR (Gen 2)
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      • by JeanPierreG
        Posted on 31 Oct 2025
        Bought on 2 Oct 2025 from LDLC
        Number of reviews: 5 Average rating: 10

        same order and same thing for the 3 products

        Quick and easy,
        no problems with the product
        no problems with the order
        no problem
        (except that you need a minimum of 100 characters to say
        ;-)

        Model: Eaton 3S 550 FR (Gen 2)
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      • by AlainL
        Posted on 31 Oct 2025
        Bought on 3 Oct 2025 from LDLC
        Number of reviews: 1 Average rating: 10

        A favourable opinion

        Quick receipt in shop, functional product as ordered, no breakdowns. would recommend, useful in the event of a power cut.

        Model: Eaton 3S 850 FR (Gen 2)
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      • by Vincent P
        Posted on 30 Oct 2025
        Bought on 10 Mar 2024 from LDLC
        Number of reviews: 4 Average rating: 10

        Reassuring and it works

        Purchased to protect the video projector, the audio streamer (Atoll) and the audio amp. I like the button that switches all the sockets on and off, and there was only one micro cut-out during use, which was totally transparent thanks to this UPS. I also like the surge protection, which is reassuring given the equipment behind it.
        Very satisfied after 1 year of operation.

        Model: Eaton 3S 550 FR (Gen 2)
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      • by Vincent P
        Posted on 30 Oct 2025
        Bought on 10 Mar 2024 from LDLC
        Number of reviews: 4 Average rating: 10

        Reassuring and it works

        Purchased to protect the Internet Box and the Synology NAS. I like the fact that it works perfectly for micro cuts that are not perceptible by other household appliances, and I think that this has an effect on the life of the equipment plugged in behind it.
        Connected via USB to Synology so that the NAS shuts down properly if there's a long power cut, it was easily recognised by the DSM software.
        Very satisfied after 1 year of operation.

        Model: Eaton 3S 850 FR (Gen 2)
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      • by MagaliC
        Posted on 30 Oct 2025
        Bought on 1 Oct 2025 from LDLC
        Number of reviews: 2 Average rating: 10

        very good inverter...

        I am pleased with my purchase of this inverter... it is used to activate a lift chair in the event of a power cut... I would like to take this opportunity to thank all the LDLC staff, who helped me to make the right choice of inverter in relation to the expected power... thank you...

        Model: Eaton 3S 850 FR (Gen 2)
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      • by JamesM
        Posted on 18 Oct 2025
        Bought on 20 Sep 2025 from LDLC
        Number of reviews: 5 Average rating: 10

        Inverter

        easy to install thanks to the instructions, so far so good. I needed it because of the frequent oranges in winter.

        Model: Eaton 3S 550 FR (Gen 2)
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      • by GerardT
        Posted on 24 Sep 2025
        Bought on 27 Aug 2025 from LDLC
        Number of reviews: 1 Average rating: 10

        My opinion

        After purchasing and commissioning the UPS coupled with a NAS, it is working correctly.
        We're waiting for a power cut to check that it's working properly and to switch off the NAS when the battery no longer has enough energy.

        Model: Eaton 3S 850 FR (Gen 2)
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      • by DidierF
        Posted on 23 Sep 2025
        Bought on 25 Aug 2025 from LDLC
        Number of reviews: 1 Average rating: 10

        Proven track record

        A tried and tested product, as I bought the same one several years ago (in black).
        It would have been ideal if LDLC had offered replacement batteries and I could have kept the old one.

        Model: Eaton 3S 450 FR (Gen 2)
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      • by MeryC
        Posted on 16 Sep 2025
        Bought on 19 Aug 2025 from LDLC
        Number of reviews: 1 Average rating: 10

        Very good product

        Very easy to set up and very good material. Useful when there are storms. I recommend this product

        Model: Eaton 3S 850 FR (Gen 2)
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      • by MickaelM
        Posted on 15 Sep 2025
        Bought on 8 Aug 2025 from LDLC
        Number of reviews: 2 Average rating: 10

        Effective

        I needed to replace my old inverter, and this one is very efficient. It meets my needs and is very good value for money, so I have nothing to complain about so far!

        Model: Eaton 3S 850 FR (Gen 2)
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      • by CedricL
        Posted on 4 Sep 2025
        Bought on 17 Jul 2025 from LDLC
        Number of reviews: 4 Average rating: 9

        Very good value for money

        The power lines in my village have suffered a few major power cuts and other problems in recent weeks, causing the surge protector on which my computer was plugged to give up the ghost. I even broke out in a cold sweat when my PC refused to boot up following one of these power cuts.
        So I decided to invest in an inverter. This Eaton 3S 850 FR fulfilled its role perfectly, the few power cuts that occurred after I received it had no impact on my equipment. These numerous sockets allow me to connect most of the elements in my installation.
        I would therefore recommend this purchase.

        Model: Eaton 3S 850 FR (Gen 2)
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      • by JeromeL
        Posted on 3 Sep 2025
        Bought on 2 Jan 2025 from LDLC
        Number of reviews: 1 Average rating: 2

        But what is this "inverter" used for and where does it come from?

        The product is not listed with EATON.
        The product simply doesn't work: you can plug appliances into it, but it doesn't protect them or prevent them from shutting down in the event of a power cut.

        Model: Eaton 3S 850 FR (Gen 2)
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      • by MichelA
        Posted on 5 Aug 2025
        Bought on 25 Jun 2025 from LDLC
        Number of reviews: 1 Average rating: 10

        An inverter what

        Having already bought the same product 1 year ago to protect a NAS, a switch and a POE camera, and being satisfied with it, why not buy a second one for a second rack with another NAS, switch and POE camera.
        More than enough autonomy for these three elements in the event of a power cut.
        The USB allows the NAS to monitor the remaining autonomy of the UPS and make a clean shutdown.

        Model: Eaton 3S 550 FR (Gen 2)
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      • by AlexandreM
        Posted on 29 Jul 2025
        Bought on 30 Jun 2025 from LDLC
        Number of reviews: 1 Average rating: 10

        Efficient and competitively priced

        Very good and inexpensive product
        Tested with power failure, maintains PC charge.
        Easy to install

        Model: Eaton 3S 550 FR (Gen 2)
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      • by AdrienH
        Posted on 21 Jul 2025
        Bought on 10 Dec 2024 from LDLC
        Number of reviews: 16 Average rating: 9

        I bought two

        Frankly, it does the job; as soon as there's a power cut, the battery takes over and there's an audible alarm telling us that the UPS is working. For a gamer PC, you're looking at around 10 to 15 minutes of autonomy, which gives us plenty of time to save our work before switching off the PC.

        Model: Eaton 3S 850 FR (Gen 2)
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      • by EvelyneC
        Posted on 18 Jul 2025
        Bought on 19 Jun 2025 from LDLC
        Number of reviews: 1 Average rating: 2

        Faulty computer

        I had to return it because it was faulty!
        It has been repaired but I must admit I don't like it!

        Model: Eaton 3S 550 FR (Gen 2)
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      • by Thomas L
        Posted on 5 Jul 2025
        Bought on 28 Jun 2025 from LDLC
        Number of reviews: 3 Average rating: 10

        Good compact inverter

        Perfect for protecting my PC and screen. Easy to install, quiet in normal operation.
        10-15 min battery life for worry-free backup. Compact size, ideal for under desks.
        Good value for money for reliable Eaton equipment.
        Would definitely recommend!

        Model: Eaton 3S 450 FR (Gen 2)
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      • by SébastienD
        Posted on 25 Jun 2025
        Bought on 28 May 2025 from LDLC
        Number of reviews: 2 Average rating: 10

        Great product for power cuts

        Great product, 1 month of use and more than 30 power cuts in my home. It keeps the home automation system going during power cuts and things like the TV shut down cleanly.
        The small/big plus of the product: network connection for monitoring the remaining battery charge during power cuts.
        A product to recommend with your eyes closed.

        Model: Eaton 3S 700 FR (Gen 2)
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      • by Anatole MIARAS
        Posted on 19 Jun 2025
        Bought on 22 May 2025 from LDLC
        Number of reviews: 1 Average rating: 10

        Simple and effective

        Works perfectly to protect your home's boxes and routers. A power cut? Not for us...

        Model: Eaton 3S 550 FR (Gen 2)
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      • by Jean-paul L
        Posted on 26 May 2025
        Bought on 27 Apr 2025 from LDLC
        Number of reviews: 7 Average rating: 10

        Efficient device

        Easy to install, it protects electrical appliances from power surges and power cuts.

        Model: Eaton 3S 700 FR (Gen 2)
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      • by EricPH
        Posted on 26 May 2025
        Bought on 28 Apr 2025 from LDLC
        Number of reviews: 10 Average rating: 8

        Perfect for network equipment

        This UPS is perfect for protecting my Data Centre: a NAS [https://www.ldlc.com/fiche/PB00494267.html] in RAID5, a Freebox Ultra and a Microtik 10G switch.
        Battery life for this equipment: 28 minutes (more than enough).
        The USB connection allows the NAS to shut down cleanly before the battery runs out.

        Model: Eaton 3S 550 FR (Gen 2)
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      • by ChristianB
        Posted on 14 May 2025
        Bought on 16 Apr 2025 from LDLC
        Number of reviews: 2 Average rating: 10

        No comment... !

        It's exactly what I wanted.
        It's exactly what I wanted.
        I don't stammer, but it's how I got to 100 characters...
        All the best.

        Model: Eaton 3S 850 FR (Gen 2)
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      • by AnnetteC
        Posted on 15 Apr 2025
        Bought on 18 Mar 2025 from LDLC
        Number of reviews: 3 Average rating: 6

        simple and effective

        A quality product that does its job. Not necessarily discreet, but effective. A sure bet for protecting your equipment. The USB power supply is great for recharging devices directly without using another socket or a computer.

        Model: Eaton 3S 850 FR (Gen 2)
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      • by AlainH
        Posted on 20 Mar 2025
        Bought on 21 Jan 2025 from LDLC
        Number of reviews: 1 Average rating: 10

        Very good product.

        Very good value for money. Easy to set up, works well with a laptop, printer and box. One drawback is the ergonomics. I would have preferred the power cable to be on the opposite side from the operating elements (on/off button, etc.).

        Model: Eaton 3S 700 FR (Gen 2)
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      • by JulesP
        Posted on 19 Mar 2025
        Bought on 14 Feb 2025 from LDLC
        Number of reviews: 6 Average rating: 10

        A product that fulfils its protective role

        I bought this product to protect a gamer computer with a somewhat fragile power supply: it's worked really well so far!

        Model: Eaton 3S 700 FR (Gen 2)
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      • by adrien M
        Posted on 18 Mar 2025
        Bought on 16 Feb 2025 from LDLC
        Number of reviews: 11 Average rating: 8

        very good

        Used to secure a box and a TV decoder, works without problems.
        I have another similar model that has been working for 5 years with no battery problems.

        Model: Eaton 3S 550 FR (Gen 2)
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      • by JuniorM
        Posted on 18 Mar 2025
        Bought on 6 Feb 2025 from LDLC
        Number of reviews: 1 Average rating: 6

        Opinion

        I appreciate this article but I think it's a shame, as soon as I plug in my fridge or my washing machine it causes the power strip to trip, which is a shame.

        Model: Eaton 3S 550 FR (Gen 2)
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      • by patrick M
        Posted on 18 Mar 2025
        Bought on 18 Jan 2025 from LDLC
        Number of reviews: 2 Average rating: 9

        EATON is good but can do better!

        Robust hardware, plenty of power, just the state of the application, "Eaton, when will there be a 64bit version and follow-up" !!!!

        Model: Eaton 3S 850 FR (Gen 2)
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      • by Masato
        Posted on 20 Nov 2024
        Bought on 5 Sep 2024 from LDLC
        Number of reviews: 1 Average rating: 10

        Crazy value for money

        Frankly for the price it's really good. If you have small cuts it's important enough to protect your computer or other devices.
        Personally, I took two, box and setup, because life in the village can sometimes bring nasty surprises!

        Model: Eaton 3S 850 FR (Gen 2)
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      • by Sylvain T
        Posted on 13 Nov 2024
        Bought on 16 Oct 2024 from LDLC
        Number of reviews: 2 Average rating: 10

        Very satisfied.

        Hello, the technical service helped me make the right choice. Both inverters work well.

        Model: Eaton 3S 700 FR (Gen 2)
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      • by CaroleD
        Posted on 29 Oct 2024
        Bought on 29 Sep 2024 from LDLC
        Number of reviews: 1 Average rating: 10

        Everything is OK

        This is my second inverter, the first was a different brand and failed me after 6 years. I appreciate this type of product in the event of an unexpected power cut, which allows me to save my work in progress (and the progress of my video game...). So far, so good. However, I do regret the little booklet, which doesn't explain much for a novice - just a few drawings. It should also be made clearer that before any use, the battery should be left to charge for at least 24 hours - I left it for 3 days. My old inverter was much more exhaustive on this point. That's all, and... thank you LDLC for the fast delivery.

        Model: Eaton 3S 850 FR (Gen 2)
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      • by ymas
        Posted on 16 Oct 2024
        Bought on 17 Sep 2024 from LDLC
        Number of reviews: 1 Average rating: 10

        Very good product

        Totally meets my expectations. So far, so good. What's more, the battery can be replaced, so you don't have to replace the inverter after 4 or 5 years. That's one of the reasons I chose it.

        Model: Eaton 3S 700 FR (Gen 2)
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      • by ClaudeN
        Posted on 12 Oct 2024
        Bought on 11 Sep 2024 from LDLC
        Number of reviews: 1 Average rating: 6

        Mitigated

        It's a good product for protecting equipment sensitive to voltage surges, but it's relatively fragile; the previous one only lasted 28 months.

        Model: Eaton 3S 850 FR (Gen 2)
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      • by redhook
        Posted on 27 Sep 2024
        Bought on 23 Sep 2024 from LDLC
        Number of reviews: 122 Average rating: 9

        Excellent

        The product suits me perfectly, in the event of a power cut there are no problems, the UPS takes over straight away. And by installing "UPS companion" it is possible to adjust quite a few things, the input voltage, the consumption in real time (between 200 and 250 W for me - hypervisor with a lot of disks and ram), the charge level and the estimated running time on the battery.

        the criteria for automatic system shutdown are :
        - Battery operation for x minutes
        - Battery life less than or equal to x minutes
        - Battery charge level less than x %.

        So there's no need to worry about short interruptions, and you can be sure of an orderly shutdown if things go wrong for a while.

        Recommended for anyone who has important data or, like me, hates losing work in progress.
        In principle, it's a convenience, but there can be unpleasant surprises during public works or other projects...

        Model: Eaton 3S 850 FR (Gen 2)
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