This company are a rare gem, I had a very unusual problem following a failed firmware upgrade on my GivEnergy kit. I then found out GivEnergy were in administration and had dismissed all their support staff! None of the usual fixes to try and restore my inverter comms would work, and I looked everywhere, forums, GivEnergy youtube support videos - even AI couldn't figure it out. My installer was talking about huge sums for system replacements, and being vague / evasive about if they'd even install replacement GivEnergy inverter. Enter Solar Tech Support, reassuring and knowledgeable from the very start, I've learnt loads about my solar system though the friendly chat while my engineer worked as he diagnosed the problem and figured out a fix procedure that I've not found anywhere else - amazing. If you need solar system repairs - especially if you like me have been left high and dry by GivEnergy, I cannot recommend this company enough. Give them a call.
Fox ESS warranty in the UK: what's covered and who can claim
- Fox ESS UK policies of 30 Oct and 3 Nov 2026
- Independent, not affiliated with or endorsed by Fox ESS
- Warranty claim support £125 per case
With your permission we review your Fox Cloud alarm history, battery data and firmware version. The remote diagnostic is free, and you pay £125 only if we fix it remotely.
Book your free remote diagnosticFox ESS fault codesSTS is independent, not affiliated with or endorsed by Fox ESS. This page summarises Fox ESS UK's published policies, and their wording is what counts.
We moved from BT to Vodafone recently. Unfortunately our GivEnergy AIO would no longer appear on the App. Additionally our GivEnergy EV charger stopped working. Vodafone insisted that their dual 2.4ghz and 5ghz compatibility mode would work with the 2.4ghz system. Unfortunately it doesn't. After nearly two weeks of trying to sort this, which also involved searching on various chat forums, I sent an email for help to STS. Within a very short time the same day I got a call from Ash, who is only 45 minutes away from us. He came and quickly got the AIO appearing on the app, so we could once again see the state of the battery. The EV charger presented more of a challenge as the QR code fixed on the side of the charger had worn away. Ash was able to find the necessary information to restore the EV charger to working order. I have a copy of the QR code and other information should we have an issue another time. I had bought a TP-Link TL-WA850RE that just works on 2.4ghz and this is linked permanently to the GivEnergy kit. STS are definitely the people to contact if you find yourself in a similar situation. We are very happy with the service STS provided.
Ron is one of those rare finds - an engineer's engineer. He insightfully and accurately diagnosed the problems with our GivEnergy system, very quickly, which helped get us back on track. We will be using him again!
Ron very quickly diagnosed what was wrong with my GivEnergy system. Unfortunately the kit has died after only 3.5 years of use-which is quite sad and timing couldn’t be worse with GivEnergy gone bust. Ron gave me advise on how to handle this with my installer. I’m hoping they’ll be forthcoming, but if they aren’t i now have a good idea how to deal with that. Thanks a lot Ron!
quick service - sorted in 30 mins. well worth saving yourself hours of reading Facebook forums! thanks
Five stars for Ronald at Solar Tech Support. It’s been stressful trying to figure things out since GivEnergy went under, but Ronald was a welcome relief. He was incredibly knowledgeable about the system and sorted me out with some excellent advice. Really glad I found this service and will be keeping them on speed-dial for any issues in the future!
- Your installer makes the claim, because Fox ESS UK's policies let only the installer and Fox-authorised staff claim.
- If your installer has gone, you can appoint a Local Installer to take their place in the claim, at your own expense, and we can be that Local Installer.
- Keep the system on Fox Cloud. Cover is cut if it isn't connected within 120 days of installation and kept connected.
- Registering within 36 months gives the longer terms.
- Nothing should be swapped before Fox approves the claim, because a replacement fitted without Fox's consent invalidates it.
Fox ESS warranty terms by product
Fox ESS UK publishes its warranty terms only as PDF policies. It issued five of them between 30 October and 3 November 2026. The inverter (version 3.0), battery (5.0), Evo (5.0) and LV5200 battery (1.0) policies are dated 3 November, and the accessories policy (1.0) is dated 30 October. The terms below are as printed in those policies and read on 4 November 2026. The M1's own policy is dated 14 September 2026.
Fox ESS UK policies, read 4 November 2026.
| Product, as Fox's policy names it | Term | If not connected to Fox Cloud within 120 days |
|---|---|---|
| Inverters: S, F, G, T, V and R Series; H1/AC1 Series; K Series; AIO Series; Power Cube Series; H3 Smart, H3 Pro and H3 Plus | 5 years from installation and commissioning; 10 years if registered within 36 months of commissioning | Back to 5 years |
| EQ series batteries: EQ2900, EQ3300, EQ4300, EQ4800, EQ5000, EQ6000 Plus, EQ7000 Plus | 12 years with registration | 60 months |
| EP series batteries: EP5, EP6, EP11, EP12 | 10 years with registration | 60 months |
| CQ7 battery | 12 years with registration | 60 months |
| CQ16 battery | 10 years with registration | 60 months |
| Evo Series (EVO 5, EVO 10) | 12 years (144 months) with registration | 60 months |
| LV5200 battery | 5 years | 24 months |
| EPS BOX-SP and EPS PRO-HC-G2 | 5 years; the policy has no registration clause | No clause in the policy |
| Smart Logger, AI Link (EMS), and external 4G, Wi-Fi, WLAN and LAN dongles | 2 years; the policy has no registration clause | No clause in the policy |
| M1 plug-in microinverter | 12 years, for the first end-user buyer | See its own policy |
How these terms work
Inverter cover can't run past 66 months from the date of manufacture, or 126 months if registered. A battery's standard 120 months is capped at 126 months from manufacture. An H3 Plus used commercially may not get the extra 5 years.
Fox's battery table assumes the battery is registered. The policy's own wording, 120 months as standard plus 24 more if registered within 36 months, doesn't match the table's 10 years for the EP series and CQ16. The table gives Fox's printed year for each model. If yours is an EP or a CQ16, ask Fox ESS UK which applies.
The battery policy also promises at least 70% of the battery's nominal energy until the warranty ends, or until it has delivered the energy throughput Fox lists for that model, whichever comes first, provided it's run within the manual's conditions. For example, Fox lists 21.60 MWh for an EP6 (5.76 kWh) and 17.47 MWh for an EQ4800 (4.66 kWh).
Fox repairs the product on site or at a Fox centre, or replaces it with the closest current product, which may differ in specification and size and may use refurbished parts. A repair or replacement doesn't restart or extend the warranty.
Fox caps its liability at the contract value, and the policies say they don't limit your statutory rights under UK consumer law.
Fox's policies are in the "Warranties" folder on Fox ESS UK's Downloads page, and we don't host copies. Older issues still circulate online, so check the version and date printed on any copy you're sent. If you're not sure of the model, you can find out what solar inverter you have.
The 120-day Fox Cloud rule and 36-month registration
How long your cover runs depends on when the system joined Fox Cloud and when it was registered.
The 120-day rule
Fox ESS UK's inverter, battery and Evo policies expect the system to be connected to Fox Cloud (the policies say "Fox ESS Cloud") within 120 days of installation, and kept connected. If it isn't, cover falls to 60 months, or to 24 months for the LV5200 battery.
What doesn't count
A temporary loss caused by a product fault, by Fox Cloud itself, or by something outside your or your installer's control doesn't count, as long as reasonable efforts are made to restore the connection. In an unoccupied new build, the 120 days start when the home is first occupied or has internet, and the system must be connected within 30 days after that.
Staying connected
Fox systems connect to Fox Cloud through a datalogger, either a plug-in WiFi, LAN or 4G stick, or one built into the inverter, depending on the model. If yours shows offline, see Fox ESS offline in Fox Cloud, and if a WiFi datalogger won't reconnect, we can set it up on site, from £195. If the Fox Cloud account sits with an installer who has gone, see monitoring account transfer.
36-month registration
Registering within 36 months of commissioning adds 5 years to Fox's inverters, 10 years in all, and registering a battery within 36 months gives it the term in Fox's table. Registration is done on Fox's warranty site, warranty.foxesscloud.com. Ask your installer if your system was registered, and when it was commissioned.
Who can make a Fox ESS warranty claim
Under Fox ESS UK's policies for inverters and batteries, only the installer and Fox-authorised staff can make a warranty claim, so an owner can't claim directly. The Evo, LV5200 and accessory policies say the same. Fox ESS UK's contact page asks owners to contact their installer first.
If your installer has gone
For an inverter or battery claim, Fox ESS UK's policies say that if your installer has gone into administration or insolvency, or your home is remote, you or the installer may appoint a Local Installer to take over the original installer's role in the claim. Whoever appoints one does so at their own discretion and expense. If your Fox ESS installer has gone bust, we can be the Local Installer you appoint to make the claim. See how we make a Fox ESS claim.
What the policies don't say
The policies don't say what makes a Local Installer suitable, or whether Fox pays towards any labour.
Fox's Tech Hub article
Fox's article on installers that go out of business, dated 3 March 2025, is older than the November 2026 policies and looser. It says to email Fox, and that for a serious fault Fox deals with the owner and ships a replacement. It also says Fox doesn't service end customers' systems, and that panels, cabling, meters and breakers carry their own warranties.
The M1 is different
The M1 plug-in microinverter has its own policy, given to the first end-user buyer, and claims go to Fox's UK service contact or an authorised service provider.
How a Fox ESS warranty claim works
Your installer, or the Local Installer you appoint, follows these steps from Fox's policies. They aren't steps for you.
They give the installer's name, the model, the fault code, the fault details and contact details.
Fox may ask for photos at this stage.
It goes with the evidence, and the installer receives a ticket number.
Fox aims to do this within 3 working days, stock permitting.
It goes back within 30 days of the replacement arriving. If Fox finds no qualifying fault in a returned unit, its policy allows a flat-rate inspection charge or recovery of the replacement's cost.
A replacement fitted without Fox's consent invalidates the claim. You can help whoever makes the claim without opening or touching anything. Note the alarm's name and when it started, from the alarm history in Fox Cloud. Find your installation date and your installer's details in your paperwork. Check whether the system has stayed online in Fox Cloud, because of the 120-day rule.
What a Fox ESS warranty doesn't cover
Fox ESS UK's policies don't cover things like storm damage or improper installation, and Fox's Tech Hub adds more.
In Fox ESS UK's policies
The policies exclude, among other things, poor ventilation; improper installation or wiring, or the wrong connectors; damage caused by other parts of the system; storms, lightning, overvoltage, fire and flood; damage in transport, cosmetic marks and normal wear; unauthorised repair; and not following Fox's manual or its claim process. Battery policies also exclude capacity lost through long storage at a low charge, or over-discharge, before installation. Parts Fox didn't sell as part of the system aren't covered.
From Fox's Tech Hub
Fox's Tech Hub articles and configuration guide say that an owner fitting an extra battery, or opening a battery case without Fox's written approval, may invalidate the warranty. Fox may refuse cover for an inverter and battery combination outside its configuration guide, and advises against adding batteries more than two years after commissioning. A moderator on Fox's forum adds that Fox wouldn't warrant a second-hand battery, and that any cover would have to come from the previous owner. Leave adding an extra battery to a qualified installer working to Fox's configuration guide.
Older Fox ESS products
Fox ESS UK's current policies don't name the ECS batteries, the original H3/AC3, the HV2600 or Mira batteries, MiniQube or Fox's EV chargers, and the inverter policy names the "H1/AC1 Series" without naming the first-generation H1 separately. That isn't proof these have no cover, so ask Fox ESS UK. Fox's global warranties are EU or global editions, so they can't settle a UK question, but your own paperwork, or your installer, can show which terms you were given.
How to reach Fox ESS UK
Start with your installer. That's Fox ESS UK's own advice to owners. If your installer is unavailable or unresponsive, Fox says to use its email or call its service line. STS is independent, not affiliated with or endorsed by Fox ESS, and doesn't speak for Fox.
Fox ESS UK's service email is service.uk@fox-ess.com, and Fox aims to reply within one working day.
Phone
Its service line is 020 7052 3472, open Monday to Friday from 9am to 5pm, not on bank holidays. Fox says telephone support is only for installation and distribution partners, but it lists the line for owners whose installer is unavailable or unresponsive. At busy times, those calls may go to a global call centre.
In the Fox app
Under Me > Contact Us in the app, you can choose your system and send Fox a request.
Fox's own page
WhatsApp support is suspended until Fox launches a new support system, and Fox also lists an online support portal. These details come from Fox's Tech Hub contact page, checked on 6 November 2026. They can change, so check there too.
How STS can help with a Fox ESS warranty claim
We cover all Fox ESS models. With your permission, we use your login or an account transfer (£95) to see your Fox Cloud data.
Diagnose it and prepare the case
We review your Fox Cloud alarm history, battery data and firmware version in a free remote diagnostic. You pay £125 only if we fix it remotely. If your installer is still trading, we can help prepare a warranty case with the fault and its evidence for them to send to Fox, at £125 per case.
Fox ESS installer gone bust?
If your Fox ESS installer has gone bust, we can be the Local Installer you appoint to make the claim. We find the fault in a free remote diagnostic, make and follow up the claim with Fox ESS UK for our £125 claim fee, and fit any replacement Fox approves, as on-site work quoted in writing before we start. If Fox finds no qualifying fault in a returned unit, its policy allows a flat-rate inspection charge or recovery of the replacement's cost, and if we made the claim, whichever Fox asks for is passed on to you. Fox decides whether to accept the claim. Ask us to make your claim.
Take over a live claim, or speak for Fox ESS
While your installer is trading, the claim is theirs to make, because Fox's policies let a Local Installer take their place only when the installer has gone into administration or insolvency, or the home is remote. We can't approve a claim or speak for Fox ESS. STS is independent, not affiliated with or endorsed by Fox ESS. We can't give legal advice. This page summarises Fox's policies, and their wording is what counts.
More Fox ESS help
Help with Fox ESS inverters and batteries in the UK: fault codes, Fox Cloud offline, EPS backup and battery alarms. Not affiliated with or endorsed by Fox ESS.
See Fox ESS hubFox ESS fault guides: battery not charging, BMS comms, grid faults, EPS backup, ground fault and Fox Cloud offline. Not affiliated with or endorsed by Fox ESS.
See Fox ESS problemsFox ESS inverter and battery alarms by name: Grid Volt Fault, BMS Lost, Iso Fault and more. What each means, what Fox advises, and where app numbers come from.
See Fox ESS fault codesDownload Fox ESS datasheets and manuals for the H1 (G2), H3, EVO and the EP, EQ and ECS batteries, plus quick installation guides for the H3 and H3 Smart.
See Fox ESS documentsQuestions about the Fox ESS warranty
Ask us about a Fox ESS fault or warranty claim
Tell us the model, the alarm you're seeing, when it started, and if your installer is still trading. If they've gone bust, we can make the claim as your Local Installer, and you pay our claim fee plus any charge Fox makes if a unit sent back to it shows no qualifying fault. The remote diagnostic is free, and warranty claim support is £125 per case.
- Not affiliated with or endorsed by Fox ESS
- No fix, no fee covers remote fixes. On-site work is quoted in writing before we start.
- Warranty claim support £125 per case
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