A remote diagnostic session reviews your portal data, confirms what export limit is set, and explains whether it can be changed or what your DNO approval actually permits.
Book your free remote diagnosticWhat's includedBrilliant 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.
Export limits are set to manage grid stability and are a legal requirement under UK grid connection rules.
Your network operator (DNO) specifies a maximum export limit in your G98/G99 approval. This is often 0 kW (zero export), 2 kW, or 4 kW. You cannot exceed this without formal written consent from the DNO.
Your installer may have configured a lower limit in the inverter settings to stay well below the DNO maximum, as a safety margin. This is configurable and can be changed — provided it doesn't exceed the DNO limit.
When solar generation exceeds house consumption, the excess is normally exported to the grid. If an export limit is set and active, the inverter curtails (reduces) generation once it reaches the limit, preventing any excess from being exported.
On weak grid connections (rural areas, long cable runs), multiple solar systems exporting simultaneously can cause voltage and frequency instability. Export limits protect the grid. Urban networks with stronger connections are more likely to permit higher or zero limits.
Battery systems add complexity: solar is limited, but battery discharge to the grid (if supported) may also be limited. Some systems let the battery bypass the export limit; others apply it to all export. Check your system's specification.
Common on weak connections. Your system must use all generated power locally (house loads or battery). No power can be exported to the grid. You cannot benefit from Smart Export Guarantee rates.
Some systems ship from the factory with 0W export enabled, or an installer sets it to 0W as a placeholder. If your DNO approval permits export (e.g., 4 kW), this is too conservative and is wasting solar potential. Increase the limit to match your DNO approval.
A reversed CT clamp makes the system see power direction backwards. The inverter may incorrectly trigger export limiting, suppress generation to prevent exceeding the limit (even when it shouldn't), or misread import/export entirely. Run the kettle test to check. See CT clamp installed wrong.
Your DNO approval may permit 4 kW export, but the inverter setting is 200W or 1 kW. This is overly restrictive. Check your DNO letter and increase the inverter limit to the approved maximum, if the setting is configurable.
A firmware update or accidental system mode change can reset the export limit to 0W or a default value. If curtailment suddenly started after an update, check whether the limit was reset and restore it to the correct value.
On hybrid systems, a misconfigured export limit can prevent the battery from charging from the grid or discharging to export, because the system incorrectly counts battery current as export. Check the portal event log for export limiting messages during battery events.
Follow these steps to identify what export limit is active and whether it needs to be changed.
Locate your G98 or G99 approval from your network operator (usually a PDF letter). Find the line that specifies the maximum export limit — it will say something like 'Maximum export: 0 kW' or 'Maximum export: 4 kW'. This is your hard legal limit and cannot be exceeded without a written variation from the DNO.
Log in to your inverter portal or app. Navigate to Settings → Network Settings, Grid Control, or similar (naming varies by brand). Look for a field labelled Export Limit, Export Restriction, Export Max, or Import/Export Control.
Note the value shown — it may be 0W, 200W, 1000W, or a percentage. Compare this to your DNO approval. If the inverter limit is lower than the DNO allows, this is worth investigating.
Turn on a kettle (2–3 kW load) and immediately watch your portal's grid import reading. It should rise sharply to 2,000–3,000W. If the reading falls, stays flat, or behaves unexpectedly, the CT clamp is likely reversed.
A reversed CT clamp will cause the export limiting logic to misbehave. Fix the CT clamp first before investigating other export limit issues.
Open your portal and look at a clear sunny day from the past week. Check the generation graph and the export graph side by side.
Example: if generation peaked at 4 kW, export peaked at 0.2 kW, and house consumption was only 0.3 kW, then approximately 3.5 kW was curtailed. This suggests the export limit is set much lower than it should be, or the limit is being triggered incorrectly.
Most portals have an event log or alarm log. Search for entries containing 'export', 'curtail', 'limit', or 'restrict'. Look at timestamps during times when you expected the system to export but it didn't.
Messages like 'Export limit active', 'Curtailing to 0.2 kW', or 'Export restriction enforced' confirm that the export limit is being actively enforced. Note the times and compare them to your generation and consumption.
On hybrid systems with a battery, check whether the export limit is preventing the battery from charging from the grid or discharging to export. Review the event log during times when you set the battery to charge or discharge.
If you see export limit messages while the battery is trying to charge, the export limit may be misconfigured or interacting poorly with the battery mode. This often requires an engineer to reconfigure the control parameters.
Example: DNO approval says 4 kW, but inverter is set to 200W. You can increase the inverter setting to the DNO maximum (4 kW in this example). This is a simple configuration change in the inverter settings. You do not need to contact the DNO.
Action: Raise the inverter export limit to match your DNO approval.
Your DNO has specified zero export — no power can leave your property and go to the grid. All generated power must be used locally (house loads or battery charging). This is a hard limit set by the network operator.
You cannot change this yourself. Your only option is to contact your network operator and request a variation to the G98/G99 approval to allow export. This usually requires a new network study and formal written consent.
Action: Contact your DNO (details on your approval letter) to request a variation and higher export limit.
Some systems need to operate below the DNO maximum due to grid instability in your area. Your installer may advise a lower limit. Or you may have received a letter from your DNO requesting a lower limit.
Action: Follow the DNO's written instruction and adjust the inverter export limit to their requested value. Do not exceed the DNO's specified maximum.
A remote diagnostic reviews your portal data live — confirms what export limit is configured, what your DNO approval permits, and exactly what needs adjusting. We'll tell you whether you need DNO permission or if it's a simple settings change.
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
