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.
These five checks take under five minutes and rule out the most common causes. Do these before digging deeper.
Look for the solar circuit — often labelled 'PV', 'Solar', or 'Inverter'. If a breaker is tripped (handle down or in the middle position), reset it. If it trips again immediately, stop and book a diagnostic — do not force it.
There are typically two isolators: an AC isolator near the inverter and a DC isolator between the panels and inverter. Both must be ON. Visual check only — do not open any covers or touch internal components.
Write down the exact text, number, or letter code shown. Different brands use completely different coding systems — a photo of the display is ideal. This single piece of information can identify the fault precisely.
These are two different problems. If your inverter display shows a current power output figure (e.g. "2.4 kW") but your app shows offline, you have a monitoring/comms fault, not a generation fault. The system is working — only the data link is broken.
A firmware update, a power cut, a router replacement, a stormy night, or a recently changed electricity tariff are all common triggers. The timing of a fault is often the fastest route to its cause.
Inverter faults are the most common reason a solar system appears to have stopped working. Most show a code — the code is the starting point for diagnosis, not a cause for alarm.
Red status light typically indicates a protection fault, grid issue, or hardware alarm. Each brand uses different flash patterns — the meaning varies significantly.
Read moreNo display, no lights, no response. Could be a tripped breaker, a failed internal fuse, or a hardware fault. Requires systematic elimination before assuming hardware failure.
Read moreInverter looks fine but output reads zero. Often a configuration issue — export limits, grid impedance, or CT clamp errors — rather than a hardware failure.
Read moreOutput lower than the MCS design estimate. Could be shading, a failed string, optimiser issue, or a misconfigured export limit capping generation.
Read moreInverters display alphanumeric codes that identify specific fault conditions. Look up your brand's fault code index for the exact meaning and recommended action.
Browse fault codesUnderstanding how your inverter converts DC from panels to AC grid power — and what can interrupt that process — makes every fault diagnosis faster.
Read guideBrand-specific inverter fault pages
Our remote diagnostic reviews your monitoring data and fault history to identify the exact issue. Free if we can't fix it.
Battery faults are the fastest-growing category of solar support calls in the UK. Many trace back to configuration errors made at installation — not hardware failure. The most common single cause is a CT clamp installed backwards.
Battery stays empty despite solar being available or cheap-rate tariff being active. Charge window settings, CT clamp orientation, BMS fault, or firmware mismatch are the typical culprits.
Read moreBattery is full but not supplying the house. Discharge schedule, grid settings, minimum SoC threshold, or a CT clamp reading the wrong circuit are typical causes.
Read moreInverter has lost communication with the battery — shows as a comms error code. Common after firmware updates, power interruptions, or on new systems with mismatched firmware versions.
Read moreYou have a battery but the house went dark during a grid outage. EPS must be explicitly enabled — it's off by default on most inverters. Also requires a dedicated EPS output circuit.
Read moreA backwards CT clamp causes the inverter to misread the grid — resulting in battery charging when it should discharge, importing when exporting, or readings with the wrong sign. One of the most frequently missed installation errors.
Read moreUnderstanding BMS logic, SoC thresholds, charge rate limits, and dispatch scheduling makes it much easier to spot when something is wrong versus how the system is designed to behave.
Read guideBrand-specific battery fault pages
We review charge/discharge logs, CT clamp readings, and schedule settings to find the exact cause. Most battery faults are fixed remotely.
A monitoring failure is not a generation failure. The two are completely separate systems. Every year, thousands of homeowners think their solar has stopped working — when it's only the data link that's broken. Check the inverter display directly before assuming the system has failed.
App shows no data or 'last updated X days ago'. Could be a local WiFi issue, a data logger hardware fault, a cloud-side outage, or a firmware update that broke the cloud connection.
Read moreMost inverter loggers only support 2.4GHz networks. Changing your router, updating the WiFi password, or switching to a band-steering mesh system are the most common triggers.
Read moreUnderstanding the data logger → cloud → app chain makes it easy to pinpoint exactly where a monitoring failure has occurred and whether the system is still generating behind a broken data link.
Read guideBrand-specific monitoring & connectivity pages
Grid-related faults are often the most frustrating because they're caused by infrastructure outside your property — not your solar system. But they still need to be diagnosed, documented, and escalated correctly to the DNO.
Inverter cuts output on sunny days because grid voltage exceeds 253V AC. This is required by law — the inverter is protecting the grid. Requires a DNO evidence pack to get fixed at the infrastructure level.
Read moreA misconfigured export limit caps generation at the wrong level, sometimes at zero. Can be set wrong at installation, reset by a firmware update, or misapplied when switching between G98 and G99 connections.
Read moreSEG payments not arriving, FiT payments stopped, or export meter not registering generation. These are separate problems with separate fixes depending on which scheme applies to your installation.
Read moreG98, G99, DNO agreements, and what a correctly configured export limit looks like.
Read guideGrid connection standards, thresholds, notification requirements and compliance.
Read guideWe build timestamped voltage logs and formal DNO complaint packs that get the issue escalated properly. Without this, DNO responses typically go nowhere.
Every major UK solar brand has a dedicated hub page covering its specific fault patterns, fault codes, configuration tasks, and diagnostic guides. Brand-specific advice is always more accurate than generic troubleshooting.
No production · optimiser comms · arc fault · red light
Open brand hub
Battery faults · portal offline · CAN fault · firmware
Open brand hub
Battery not charging · CT miswire · grid faults
Open brand hub
Error 04 · Error 117 · ShineWifi offline · isolation
Open brand hub
Grid overvoltage · no output · monitoring
Open brand hub
Dongle offline · Luna battery · no permission error
Open brand hubOther supported brands
Tell us what you're seeing — fault codes, display behaviour, app status, when it started. We'll review your details and come back with a clear diagnosis path, usually same day.
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