Documents are useful for reference, but if your system has a fault we can diagnose it remotely, usually the same day.
Book your free remote diagnosticAll Fox ESS problemsIndependent, not affiliated with or endorsed by Fox ESS.
This is the second time I have used Solar tech first time a faulty Givenergy inverter, tried all sorts to get it going my last call was to Solar tech and yes they got me back up and running, today system went down again due to a firmeware update and Ron talked me through everything all whilst he was on someone’s roof sorting their system out. I would recommend this chap to every body that has problems with their system no matter what make..
Great service in supplying and fitting an additional GivEnergy battery. Went the extra mile in managing to fit the battery in to a difficult space.
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!
As a Givenergy customer I have been forced to get familiar with my system since it developed battery failure. I managed to find someone to repair the battery and managed to do the physical install and connection. I reached out to Ron at Solar Tech Support and with the help of whatsapp and many screenshots of the system, cloud and App Ron managed to get me through getting it all up and running. Big thanks to Ron.👏👏
I've spoken to Ron a couple of times with issues with my Givenergy installation. Such a friendly knowledge guy very highly recommended. Thank you very much for resolving my issues
Just had my whole givenergy system go down. Battery and inverter. Ron sorted me out today 3 hours to get it all sorted. Clear instructions and successful. Could not ask for better. Now that givenergy has gone bust i was concerned as to where to go for help. I have found it and can recommend them to all you givenergy users out there. Off for a cup of coffee now😄
Start with your model. It's on the label on the unit or in the app. Not sure what you have? Our guide to identifying your inverter shows where to look. Then search the list below or pick a document type.
Specifications for one product: electrical ratings and dimensions, with capacity on the battery and all-in-one sheets. Use one to check what a model can do or to compare two.
Fox ESS's full reference for a product: installation, commissioning, maintenance and troubleshooting. They're written mainly for qualified electricians, so leave installation and wiring steps to one.
Short fitting guides for the H3, the H3 Smart and the Smart LAN stick. They're written for whoever installs the product and don't cover troubleshooting.
Alarm names and numbers are in our Fox ESS fault code index, and warranty terms are in our Fox ESS warranty guide. We don't host firmware for any brand. The H1 documents here don't cover first-generation H1 and AC1 models. For the KH, KA and other models we don't hold, see Fox ESS's downloads.
23 Fox ESS documents: datasheets, manuals and quick installation guides. All files download directly and come from manufacturer publications.
No documents match . Try a shorter query or clear the search.
Manufacturer product spec sheets: electrical specifications and dimensions, with capacity on the battery and all-in-one sheets.
These cover installation, commissioning, maintenance and troubleshooting and are written mainly for qualified electricians, so leave installation steps to a qualified electrician.
Short fitting guides, written for whoever installs the product. They don't cover troubleshooting.
Fox 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 code indexFox ESS UK warranty terms by product, the 120-day Fox Cloud rule and who can claim, from the 2026 policies. If your installer's gone bust, we can claim.
See Fox ESS warranty guideFox ESS showing Grid Volt (26), Grid Freq (27), 10min Volt (28) or Grid Lost (1)? What each alarm means, what you can check and when to tell your DNO.
See grid faultsFox ESS Ground Fault and Iso Fault are two different alarms: a failed ground connection, and low insulation on the PV side. What each means and what to do.
See ground faultFox ESS battery offline or BMS Lost (code 14)? What the battery alarms mean, what you can check in the Fox Cloud app, and when to call your installer.
See BMS communicationFox ESS battery not charging from solar or the grid, or not discharging? Check the work mode, Mode Scheduler and reserve settings in the Fox Cloud app first.
See battery not chargingFox ESS gave no backup in a power cut? Check whether EPS was wired and switched on, the reserve settings and the load, and which jobs need an electrician.
See EPS not workingFox ESS offline in FoxCloud 2.0 or the app? See if it's the app, the dongle or the system, follow Fox's own checks, re-pair the dongle and deal with 40004.
See Fox Cloud offlineFox ESS Meter Lost Fault (242) or CT code 240? What each one means and what you can check in the Fox app without opening anything. Free remote diagnostic.
See Meter or CT faultIf your system has a fault, tell us what you're seeing. We'll review your details and come back with a clear diagnosis, usually the same day.
Due to unprecedented demand we’re currently only carrying out on-site work in Yorkshire, and replies are taking up to 7 days. Remote diagnostics continue for the whole UK as normal.
Every message is read and answered, so please don’t send it twice; that only slows the queue.
We use cookies to measure traffic and ads, sharing limited hashed data with Meta and Google. Decline keeps only essential cookies. Privacy policy