A remote diagnostic session reviews your portal data live, confirms the cause, and tells you exactly what needs changing — or whether hardware intervention is needed.
Book your free remote diagnosticWhat's includedRon diagnosed the problem remotely - efficiently and order the part identified as the fault - this part came directly from to me and Ron visited within a few days and within the hour corrected the problem and since everything has been excellent -highly recommended - very pleasant manner and lovely to work with . Ivor Morris.
Ron was really helpful. He remotely adjusted my battery settings on the same day I contacted him, and at a reasonable price. Great service.
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.
Excellent response to diagnose a problem on our SolarEdge installation. Kept us informed at every step. Diagnosis quickly completed and solution implemented.
I've spoken to Ron a couple of times with issues with my Givenergy installation. Such a friendly knowledge guy very highly recommended. Thank you very much for resolving my issues
Our SolarEdge PV system with LG batteries had its first hiccup after 8 years of hard work. The Inverter failed. Fortunately I found Solar-Tech-Support who diagnosed the problem very quickly, ordered a replacement unit and fitted it shortly after we received the unit from SolarEdge. Very thorough and professional approach. Thank you, a solid 5 star recommendation.
In order of how commonly we see each cause.
By far the most common cause. Firmware updates frequently reset Timed Charge back to Eco Mode without warning. In Eco Mode the battery will not draw from the grid on a schedule.
A reversed CT clamp makes the inverter see import as export — so it suppresses charging because it thinks the house is already exporting. See CT clamp installed wrong.
The charge window times are incorrectly set, or the inverter clock/timezone is wrong — causing the window to run outside your cheap-rate period.
The battery's operating range maximum is set below 100% — often deliberately at 80% by the installer. The battery stops charging at that level even during Timed Charge.
A firmware update silently wiped system mode, charge windows, and operating range settings. You need to re-enter them all and verify they have saved.
Less common. Shows as a fault code in the event log or an alarm on the battery unit itself. Requires engineer involvement. Rule out settings causes first.
Work through these in order — most cases are resolved before step 5.
Open your portal or app and find the system mode setting. If it says Eco Mode, Self-Consumption, or similar, it will not grid-charge on a schedule. Change it to Timed Charge, Time of Use, or the equivalent for your brand. Save the setting and verify it has stuck by checking back in the app after a few minutes.
Confirm the charge start and end times match your cheap-rate electricity period exactly. Check the inverter clock — if it is showing the wrong time, or is set to UTC when BST is in effect, the window will be running one hour out of phase with your tariff.
Example: Octopus Go cheap rate is 00:30–04:30. If your inverter shows UTC and the UK is on BST (UTC+1), you need to set the window to 23:30–03:30 to match — or switch the inverter clock to local time.
Find the operating range or SoC target setting. Check what the maximum is — if it is set to 80% and the battery is currently at 78–80%, it will not charge any further. The battery is working correctly; it is just following the configured limit. Raise the maximum if you want more charge capacity.
Turn on a kettle and watch the grid import reading in your portal. It should rise by about 2,000–3,000W. If the figure falls, stays flat, or moves in the wrong direction, the CT clamp is reversed — the inverter cannot correctly see grid import and is blocking the charge command. Use the CT clamp installed wrong page for the full fix guide.
Open the event log in your portal and look for any battery-side errors — BMS fault, cell voltage alarm, communication fault, or similar. If you find fault codes, note them down. These usually indicate a hardware issue that requires an engineer rather than a settings fix. A remote diagnostic session can assess the fault codes and advise on next steps.
If the battery charges from the grid but not from solar, the issue is more likely to be one of these:
Export limiting set too aggressively. If your DNO export limit is set to 0W, the inverter may be curtailing solar before it reaches the battery. Check the export limit setting in your configuration.
CT clamp on the solar circuit is reversed. On installations where the CT monitors the solar feed rather than the grid feed, a backwards clamp shows negative generation — the inverter doesn't see any solar to divert to the battery.
Generation figures look correct but battery still doesn't charge. This can indicate a DC-side connection issue between the solar strings and the inverter's battery charge circuit. Requires on-site investigation.
A remote diagnostic includes a live review of your portal data — system mode, event log, charge history, and CT clamp verification. We confirm the exact cause and advise whether it's a settings fix or an engineer visit.
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