If AC supply, DC isolator, and MCBs are all correct but the inverter is still dead, it needs an engineer assessment. Hardware failure diagnosis and repair is usually needed.
Book your free remote diagnosticSolar system repairSafety: do not open the inverter enclosure. Internal components include live high-voltage DC even when the AC supply is isolated. See our shutdown guide for safe isolation procedures.
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.
Checking at night? Grid-tied solar inverters shut down completely at night — no lights, no display. This is completely normal. Wait until there is at least some daylight (even overcast) before concluding the inverter has a fault. Many early-morning calls turn out to be owners checking at 6am before sunrise.
Starting with the simplest and most common causes.
Most common cause. The AC solar isolator has been switched to OFF — after a maintenance visit, a power cut, or accidentally. Turn it back on and wait 3 minutes.
The solar circuit breaker in the consumer unit has tripped. Look for a breaker in the mid or down position. Reset once — if it trips again, call an electrician.
On some inverter models the control electronics are powered by the DC string. If the DC isolator is off, the inverter has no power at all, even if the AC supply is present.
Grid-tied inverters require the grid to start. During a power cut the inverter will not operate. It will restart automatically when the grid supply returns.
A lightning proximity event or grid switching transient has damaged internal components. The inverter was working, then a storm or grid event occurred, and it has been dead since. Requires engineer diagnosis.
The inverter itself has failed — capacitor degradation, failed power supply board, or IGBT failure. More common on inverters over 8–10 years old. Requires component-level diagnosis.
Do these checks during daylight hours only.
Find the AC solar isolator — usually a red rotary switch mounted near the consumer unit or solar generation meter. Check it is in the ON (I) position. If it is in the OFF (O) position, turn it on. Wait 2–3 minutes for the inverter to initialise and begin startup checks.
Open the consumer unit and look for any MCB in the tripped position (mid or down) labelled Solar, PV, or Inverter. Also check the main RCD or RCBO. Reset any tripped breaker once. If it holds, wait for the inverter to start. If it trips again immediately, leave it and call an electrician.
Locate the DC isolator on or near the inverter. It should be in the ON position. If it is OFF, turn it on. On some inverter models this is the primary power source for the control electronics.
Check that other appliances in the house have power. If the grid is down, the inverter will remain dark until it returns. Most inverters wait 60–90 seconds after grid restoration before attempting reconnection — this is a G98/G99 requirement.
If the AC supply is present, the DC isolator is on, the MCBs are healthy, and there is no power cut — but the inverter is still completely dark — the inverter itself has likely failed. This requires component-level diagnosis and cannot be self-resolved. A remote diagnostic session will confirm the situation before an engineer visit is arranged.
Inverter startup requirements differ by manufacturer. Use the note for your brand before working through a full fault investigation.
GivEnergy AIO and Gen2 hybrid inverters require both AC isolation (consumer unit breaker) and DC isolation (rooftop DC switch) to be live before the unit will boot. A blank display with power present usually means DC voltage is not reaching the inverter — check the DC switch and any inline fusing. See the GivEnergy hub for detailed startup checks.
Growatt SPH and MIN series inverters require a complete L/N/E AC connection before the unit will start — a missing Neutral or an open AC output breaker prevents boot entirely. If the display stays blank, verify the AC output terminal block connections at the inverter before investigating further.
Sunsynk inverters include an internal AC output circuit breaker accessible via a small hatch on the unit. This breaker occasionally trips on surge events and is easy to miss. If the inverter receives DC power but does not boot, check and reset the internal breaker before investigating further.
A remote session reviews whatever portal data is available and confirms the situation before recommending the right on-site service. For a non-responsive inverter, an emergency repair visit may be appropriate.
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