We review your SigenCloud alarm log and BMS communication data remotely. If a module has failed, we confirm which one and advise on warranty or replacement.
Book your free remote diagnosticBack to Sigenergy hubSafety: do not open battery enclosures. Lithium battery systems carry serious electrical risk.
An amazing experience and service from Ronald - totally 100% recommend. All remotely sorted with no need to wait around for someone to pop in and sort. I was a little nervous about doing this but was really easy and he talks you through the steps. Just such relief and we are back up and running again.
Wow!!! I have a Givenergy system. The battery stopped charging and depleted fully. Obviously Givenergy went into administration, so I was working with the reseller / installer to get it fixed. They told me they couldn't resolve it and the best they could do was offer me a replAcement at cost, so basically having to buy a new system. I happened to come across STS when searching for how to fix it myself. Ronald has been a god send, within 2 days all is working perfectly and set up correctly. When it comes to experts. He truly is the expert. If you have issues with your Givenergy system and don't know where to go for good help, give him call. 07944 877329. Thanks Ronald, regards Neil W
Excellent response to diagnose a problem on our SolarEdge installation. Kept us informed at every step. Diagnosis quickly completed and solution implemented.
Sts does a extremely great job. Thank you.
Brilliant. He fitted a new dongle and set the system up properly. Even better, he explained why the storage batteries don't work in a power cut - not correctly wired up - expensive to fix, but a simple turn of the master switch will give emergency power. He is the third technician to look at this issue and the only one to resolve it. Friendly and appoachable, comes when he says he will and reasonable charges. What's not to like!
Ronald was great to help me sort out my giv energy inverter issue since company has gone bankrupt in april 26.
Most SigenStor battery module alarms are transient BMS communication faults. Work through these steps in order — the majority are resolved at step 2 (power cycle).
Log into SigenCloud (web portal or Sigenhome app). Navigate to your SigenStor system and open the alarm or event log. Look for:
Screenshot or note down the alarm details before proceeding — your engineer will need this information.
A full power cycle resets BMS communication between the inverter and all battery modules. This resolves most transient communication faults. The AC comes off first and the battery modules go off last:
Why this order: SigenStor modules have no separate power button, so the module isolator is the battery's only control. That is why the AC comes off first.
Check SigenCloud after 10 minutes. If all modules show online with current SoC readings and the alarm has cleared, no further action is needed.
After power cycling, check SigenCloud for the communication status of each battery module in the stack:
Every module shows a current SoC, voltage reading, and no active alarms. The fault was transient — monitor for recurrence over the next few days.
A specific module is not responding after power cycle. This points to a hardware fault in that module's BMS board or a loose communication cable.
If one module is consistently offline, note the module number and serial number from SigenCloud. This identifies the specific unit for warranty or replacement.
In SigenCloud, check the firmware version reported by each battery module. Firmware mismatches between modules in a stack can cause persistent BMS communication errors:
Firmware updates on SigenStor battery modules require installer-level SigenCloud access or physical access to the system. STS can coordinate this remotely if you have installer credentials, or arrange for an on-site update.
If a specific module consistently triggers alarms after power cycling and firmware checks, it likely has a hardware fault. From SigenCloud, gather:
This evidence package supports a warranty claim with Sigenergy. SigenStor battery modules are covered under the manufacturer warranty — typically 10 years for residential systems.
Sigenergy SigenStor battery systems use a modular stacking architecture. Each battery module has its own BMS (Battery Management System) controller that monitors cell voltages, temperatures, and charge state. The modules communicate with the SigenStor inverter via a daisy-chained communication bus. When one module loses communication — due to a transient glitch, a loose cable, or a firmware error — the inverter raises a BMS alarm and may restrict charging or discharging to protect the stack.
The good news is that most BMS communication faults on SigenStor systems are transient. A power cycle resets all BMS controllers and re-establishes the communication chain. This clears the majority of alarms. Persistent alarms typically point to one of three things: a firmware version mismatch between modules (common when a new module is added to an existing stack), a loose or corroded communication cable between modules, or a genuine hardware fault in one module's BMS board.
Sigenergy is a relatively new brand in the UK market, and their battery management firmware is still evolving. Firmware updates sometimes introduce new alarm thresholds or change how modules report faults. If you see new alarm types appearing after a firmware update, this may be the system reporting conditions that were previously not flagged — not necessarily a new physical fault.
Return to the Sigenergy brand hub to explore other common faults and services.
Sigenergy support hubWe review your SigenCloud alarm log and BMS data remotely. If a module has failed, we confirm which one and provide evidence for a warranty claim or replacement quote.
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.
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