Most solar faults are diagnosed remotely in a single session. Tell us what you're seeing and we'll work it out.
Book your free remote diagnosticSee the Solar Health PlanSafety: do not open inverter or battery enclosures. If you smell burning or see arcing, isolate at the consumer unit and call 999.
Brilliant support to get my solar battery working again. I didn’t expect help on a Saturday but Ron answered the phone, listened and sent me the information I needed to get it going, answered questions etc. A brilliant service I’d happily recommend.
Ron was brilliant. He really tried to help. He spent hours trying to fix our GivEnergy AIO and ultimately it became apparent that it needed parts to fix the BMS management system. As there appears to be no replacement parts available on the market, he gave excellent advice on what options are now available to move forward. He is incredibly helpful and knowledgeable.
Called back within a day and gave good advice.
Ron was extremely helpful and tried his best to repair/reset our GivEnergy inverter remotely. In the event he was unsuccessful but he couldn’t have been more helpful. If you have problems with a GivEnergy system please contact him. Highly recommended
Big thanks to Ron. He was incredibly patient and helpful over the phone, taking the time to walk myself and the installer through every troubleshooting step. Through lots of testing he figured out the issue was definitely a hardware issue, which allows us to consider our next steps. Support fees are clear and they operate a “no fix no fee” policy. It is rare to find that kind of honesty combined with dedicated phone support nowadays. I highly recommend Ron, if you need help with your solar system don’t hesitate to give him a call.
A superb service from Ron who went beyond the normal service received from other Tech support companies. I live abroad and was badly let down when my givenergy system failed (and the company went bankrupt) and the local supplier ran away from the problem. Ron sorted the problem and even accessed specialist coding for the inverter that would not be available for suppliers. Ron also ran a full diagnostic to insure that all was in good working order afterwards. Without Rons support and patient assistance I doubt I would ever have got the system back up and running. Well done and thankyou and you have a customer for the future.
Brilliant support to get my solar battery working again. I didn’t expect help on a Saturday but Ron answered the phone, listened and sent me the information I needed to get it going, answered questions etc. A brilliant service I’d happily recommend.
Ron was brilliant. He really tried to help. He spent hours trying to fix our GivEnergy AIO and ultimately it became apparent that it needed parts to fix the BMS management system. As there appears to be no replacement parts available on the market, he gave excellent advice on what options are now available to move forward. He is incredibly helpful and knowledgeable.
Called back within a day and gave good advice.
Ron was extremely helpful and tried his best to repair/reset our GivEnergy inverter remotely. In the event he was unsuccessful but he couldn’t have been more helpful. If you have problems with a GivEnergy system please contact him. Highly recommended
Big thanks to Ron. He was incredibly patient and helpful over the phone, taking the time to walk myself and the installer through every troubleshooting step. Through lots of testing he figured out the issue was definitely a hardware issue, which allows us to consider our next steps. Support fees are clear and they operate a “no fix no fee” policy. It is rare to find that kind of honesty combined with dedicated phone support nowadays. I highly recommend Ron, if you need help with your solar system don’t hesitate to give him a call.
A superb service from Ron who went beyond the normal service received from other Tech support companies. I live abroad and was badly let down when my givenergy system failed (and the company went bankrupt) and the local supplier ran away from the problem. Ron sorted the problem and even accessed specialist coding for the inverter that would not be available for suppliers. Ron also ran a full diagnostic to insure that all was in good working order afterwards. Without Rons support and patient assistance I doubt I would ever have got the system back up and running. Well done and thankyou and you have a customer for the future.
Every fault below has a proven diagnostic path. Click through for the specific page or book a diagnostic if you're unsure.
Modules stuck at low SoC despite solar generation. Working mode misconfiguration, BMS communication fault, or grid code protection blocking charge.
See diagnostic guide →SigenCloud reports a battery module communication fault. Transient dropout from power cycle, firmware mismatch between modules, or hardware fault in BMS.
See diagnostic guide →Battery module not responding to SigenStor inverter. Check SigenCloud alarm log for exact fault code. Power cycle resolves most transient faults.
See diagnostic guide →App or SigenCloud shows no data. Gateway lost internet connection after router change, WiFi password update, or firmware update that broke cloud connectivity.
See diagnostic guide →SigenStor gateway can't find network or stay connected. Requires 2.4GHz — many problems stem from 5GHz-only or band-steering routers.
See setup guide →Backup power not available during power cut. EPS disabled, wiring issue, or SoC below minimum threshold.
Guide →SigenStor disconnecting from grid due to G98/G99 fault. Voltage, frequency, or isolation error.
See diagnostic guide →SigenStor not generating from panels. DC string fault, inverter protection trip, or grid code lock.
Guide →SigenCloud displays fault codes and alarms when system errors occur. Our diagnostic process covers all fault categories and alarm codes across SigenStor models.
We review SigenCloud data, app settings, and error history to identify the exact fault without a site visit.
SigenCloud access lost, portal locked, or firmware misconfiguration. We recover monitoring and rebuild documentation.
BMS cable fault, battery module replacement, inverter repair, EPS wiring validation. Targeted visit — no guesswork on arrival.
Download datasheets, installation manuals and warranty documents for SigEnergy hybrid inverters and battery systems. Self-hosted and always current.
Sigenergy is a relatively new UK market entrant (from 2022 onward) with advanced hybrid inverter and modular battery architecture. The SigenStor inverter series (5–12kW single phase) combines solar MPPT, battery management, and grid connection in one unit. The system pairs with modular SigenStor Energy Storage System (5–30kWh) for scalable capacity. A key differentiator is native V2G (vehicle-to-grid) and V2H (vehicle-to-home) capability built into every system.
The SigenCloud portal and Sigenhome app provide monitoring and configuration. As a newer brand, firmware updates are frequent and can sometimes affect connectivity. Common issues include EPS (Emergency Power Supply) requiring correct wiring and enablement, grid code faults (G98 vs G99), BMS communication faults between battery modules, and SigenCloud connectivity drops after router changes.
If you're searching for Sigenergy battery not charging, SigenStor BMS fault, SigenCloud offline, Sigenergy EPS not working, or Sigenergy V2G issues, STS provides independent diagnostic and repair support across the UK — not affiliated with Sigenergy Ltd or your installer. We diagnose at the engineering level using portal data, app screenshots, and on-site testing where needed.
Compare Sigenergy against other brands: Sigenergy vs GivEnergy, Sigenergy vs AlphaESS, Sigenergy vs Fox ESS, Tesla Powerwall vs Sigenergy.
STS supports all major inverter and battery brands — not just Sigenergy. If you have a mixed-brand system or are comparing options, visit the brand hub.
Browse all 19 brandsTell us what's happening. We'll review your details and come back with a clear diagnosis path — usually same day.
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