Most Sunsynk configuration issues are fixed 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: If your battery is showing error lights or unusual behaviour, isolate at the DC switch before investigating.
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.
Charge window set correctly in Solarman but battery stays at minimum SoC overnight. Often a TOU configuration error, grid charge disabled, or battery SoC minimum threshold too high. Very common after Octopus tariff changes.
See diagnostic guide →The Sunsynk inverter has native Octopus Agile, Intelligent, and Go integration but requires precise schedule configuration. Common issues: charge windows offset by BST/GMT, grid charge enable toggle, SoC target not set high enough. We configure the full schedule remotely.
See diagnostic guide →Battery not powering the house during peak times or grid outage. Could be a discharge schedule configuration error, SoC minimum threshold set too high, or an EPS/backup power circuit issue.
See diagnostic guide →Sunsynk hybrid inverter powered but not generating. Check Solarman for DC input voltage and error codes. Common causes: DC isolator tripped, string fault, or grid connection fault.
See diagnostic guide →Inverter trips off grid due to AC voltage or frequency exceeding G98/G99 limits. Common in areas with many solar systems on the same substation. Reconnects automatically but may need export limiting to prevent repeat trips.
See diagnostic guide →Sunsynk supports EPS (Emergency Power Supply) mode but it must be correctly wired and configured. If the house lost power during a grid outage despite a charged battery, EPS is likely disabled or the load circuit isn't connected to the EPS output.
See diagnostic guide →Solarman (formerly PVMaster) shows no data. Usually caused by the inverter's WiFi/4G datalogger losing connectivity. The inverter continues operating normally. Router changes, password updates, or logger hardware failure are the most common causes.
See diagnostic guide →Sunsynk dataloggers require 2.4GHz WiFi. Many 'monitoring not working' reports after router upgrades are caused by the new router defaulting to 5GHz or using band steering. We reconfigure the datalogger remotely.
See diagnostic guide →Sunsynk fault codes appear in the Solarman app and on the inverter display. Common codes relate to: grid voltage faults (E02X series), battery communication errors, DC bus faults, and temperature protection trips. Share your exact code when you book — we identify the root cause as part of the remote diagnostic.
We review Solarman data, TOU schedules, and error history to identify the exact fault without a site visit.
We configure your Sunsynk charge schedule from scratch for Octopus Agile, Intelligent, Go, or Flux. Most configuration faults are resolved in a single remote session.
EPS circuit verification, DC cable fault location, CT clamp correction, component replacement.
Download datasheets, installation manuals, warranty documents and app guides for Sunsynk hybrid inverters and ECCO batteries. Self-hosted and always current.
Sunsynk makes hybrid inverters that are particularly popular with UK installers for their flexibility and strong tariff integration. The inverter handles both solar generation and battery storage, with a built-in grid charger that allows the battery to be charged from the grid at cheap-rate times. Sunsynk integrates directly with Octopus Agile, Intelligent, and Go tariffs through configurable Time of Use (TOU) schedules — but this only works correctly when configured precisely. Many 'battery not charging' complaints are actually configuration errors, not hardware faults.
Monitoring is provided by the Solarman app (formerly PVMaster) and the SolarmanPro platform for installers. The inverter's WiFi or 4G datalogger must maintain a stable internet connection for remote data access. The most common searches we handle for Sunsynk: Sunsynk battery not charging, Sunsynk cheap rate not working, Sunsynk Solarman offline, Sunsynk grid disconnect, and Sunsynk Octopus configuration. STS provides independent Sunsynk support — not affiliated with Sunsynk Energy.
STS supports all major inverter and battery brands — not just Sunsynk. 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.
We use cookies to measure traffic and improve our ads — including sharing limited, hashed details with Meta (Facebook) to measure ad performance. Accept, or decline for essential cookies only. Privacy policy
