Gateway offline, backup not working, app not updating — we diagnose Tesla systems remotely in a single session.
Book your free remote diagnosticSee the Solar Health PlanSafety: do not attempt to repair the Powerwall unit itself. Gateway WiFi resets require installer credentials.
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.
Powerwall stuck at low state of charge despite solar generation. Usually caused by incorrect operating mode in Tesla app (Self-Powered vs Time-Based Control), grid connection fault, or Gateway communication issue with solar inverter. Check Energy Exports setting.
See diagnostic guide →Powerwall not feeding energy to home during peak hours or overload periods. May indicate incorrect operating mode, grid connection fault, or Gateway control issue. Check Tesla app operating mode and discharge settings.
See diagnostic guide →Operating mode (Self-Powered, Time-Based Control, Backup Reserve) not working as configured. Requires Tesla app access to review settings and energy flow logic. Gateway orchestrates the mode transitions.
See diagnostic guide →Backup circuit remains unpowered during grid outage despite battery charge. Possible causes: backup circuit not wired to Gateway, Gateway failed to island, or Powerwall in low-priority mode. Islanding is the process where Gateway detects grid down and switches.
See diagnostic guide →Backup mode triggered but backup reserve not activated. Usually caused by backup reserve set too low relative to battery SoC at time of outage. Backup reserve is the minimum charge held for emergencies. Check Tesla app backup settings.
See diagnostic guide →Gateway fails to detect grid loss and switch to island mode during outage. May be caused by slow Gateway response, islanding protection trip, or Gateway hardware fault. This is a critical safety function requiring site visit for testing.
See diagnostic guide →App shows no Powerwall data or connection lost. Gateway has lost internet connection. Check WiFi LED on Gateway (solid green = connected). If offline, check router and Gateway WiFi settings. Factory reset of WiFi may be needed after router change.
See diagnostic guide →Tesla app opens but Powerwall appears disconnected or shows stale data. May indicate Gateway connectivity issue, WiFi dropout, or cloud synchronization lag. Battery system continues operating normally even when app offline.
See diagnostic guide →Tesla Powerwall doesn't display traditional fault codes — faults appear as notifications in the Tesla app and in the Gateway web interface. We diagnose issues using app notifications, Energy History data, and Gateway logs.
We review Tesla app data, notification history, and Energy History to identify the exact fault without a site visit.
Gateway offline, WiFi not connecting, or app access lost? We recover connectivity and reconfigure the system.
Island mode testing, wiring verification, backup circuit inspection, Gateway settings check. Evidence-led site visit.
Download datasheets, installation guides and warranty documents for Tesla Powerwall battery systems. Self-hosted and always current.
Having issues with your Tesla Powerwall? Our fault code index explains what each error means, common causes, and safe next steps.
Tesla Powerwall is an AC-coupled battery storage system designed to work with existing solar installations. Powerwall 2 (13.5kWh usable) connects to the AC side of a solar inverter via the Gateway, which manages grid connection, backup switching, and energy flow. Powerwall 3 integrates a solar inverter directly into the battery unit — eliminating the need for separate solar inverter and Gateway.
The Tesla app provides monitoring and control for operating modes (Self-Powered, Time-Based Control, Backup Reserve), backup reserve levels, and scheduling. The Gateway is the brains — it detects grid loss and switches to island mode (backup) within milliseconds. Most Powerwall 2 issues come from Gateway WiFi loss, backup reserve misconfiguration, or wiring faults.
Important: Powerwall is not a solar inverter — it's a battery storage system. If you have solar on Powerwall 2, there's a separate solar inverter on your AC side. Island mode is the process where Gateway detects grid down and switches to backup — it must happen within milliseconds to avoid triggering grid protection. This is why Gateway quality and WiFi stability matter.
If you're searching for Tesla Powerwall repair UK, Powerwall not charging, Powerwall backup not working, Tesla Gateway offline, or Tesla app not updating, STS provides independent diagnostic and support across the UK — not affiliated with Tesla.
STS supports all major inverter and battery brands — not just Tesla Powerwall. 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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