If your system flat-lines during peak sun even when household loads are running, the export meter communication has probably dropped — forcing the inverter into fixed limiting. We restore dynamic limiting remotely via SetApp.
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Excellent service from Solar Tech Support. Extremely quick to respond, easy to deal with and clearly very talented engineers. They were persistent throughout a complex GivEnergy battery issue and resolved everything completely. Highly knowledgeable, professional and reassuring support from start to finish. Highly recommended.
Massively massively recommended. We had a big battery array (49kW across three phases) put in four years ago. c £35k cost. It’s been a total nightmare for many reasons, not least 1. our installer being totally useless and unresponsive and 2. Givenergy, our battery supplier, going bust. Long story short it had never worked anywhere near properly despite countless hours on phones and emails; the best we’d achieved was one third of the batteries working. Rather than write it off, I asked a PM friend to try to source someone who could come on site and review and revive the system. He found Solar Tech Support and Ron. Ron assured us he was the man to get it going again. After so many years of pain, I was not convinced but, true to his word, five hours later it was up and running. Lovely chap, super knowledgeable with a support team to lean on who are also clearly super technical. I honestly didn’t think there was much chance of getting this array going ever again so was absolutely delighted when Ron and team pulled it off. Bravo!
I sent a message on their website regarding a problem I have on my Givenergy system. Although not supplied by Ronald, I thought it was worth an email. Within the hour on a Saturday, he phoned and we discussed the problem. He logged in remotely and gave excellent advice. I'm too far away for his on-site help but he did diagnose the problem and was happy also to chat through my thoughts about an upcoming solar/battery install I'm planning. Great bloke.... if only he was nearer!
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Ron responded very promptly regarding my GivEnergy battery issue, his knowledgeable diagnosis was spot on and resolved the issue on first attempt. Would recommend to any and all.
Ron is incredibly knowledgeable about solar installs in general but knows givenergy products inside out and the key personnel that worked there from the start to the end. My problem was spurious in its nature but Ron spotted it straight away when he understood the installation details. In essence the installers didn’t fit the correct trip switch. He also gave me hope that in the future hardware repairs could be possible but it’s still early days. This guy really is in the know and keen to sucas a business If you need help don’t hesitate
Most UK SolarEdge systems above 3.68 kW have a G99 export limit configured via SetApp. The limit should only restrict grid export — not total generation.
If your SolarEdge system is generating less than it should during peak sun, the export limit configuration is the first thing to check.
Export limiting controls how much power the inverter sends to the grid. In the UK, systems above 3.68 kW single-phase require G99 approval from the DNO, and most G99 approvals include an export limit — typically 3.68 kW or zero export.
The inverter monitors grid export in real-time using a revenue grade meter or CT clamp at the grid connection point, and automatically reduces output when export approaches the limit. The limit should only affect power sent to the grid — not total generation. Your system should still produce enough to cover household consumption plus the export limit.
The clearest sign of an export limit problem is a flat line on your generation graph during peak sun. Open the SolarEdge monitoring portal and compare your daily generation curve against what the panels should produce. A healthy system follows a smooth bell curve peaking around midday.
If the curve flattens at a consistent level — even when you are running dishwashers, washing machines, or other loads — the export limit is probably misconfigured. With a 3.68 kW export limit and 2 kW household consumption, the inverter should produce up to 5.68 kW before curtailing. If it is flat at 3.68 kW total, the system is ignoring your self-consumption and applying a fixed cap.
Dynamic limiting uses the meter to track real-time export — the inverter adjusts continuously to keep export below the limit while maximising self-consumption. This is the correct mode for most UK installations.
Fixed limiting applies a hard cap on total output regardless of what you are consuming. If your system curtails even with high household loads, it may be set to fixed mode — or the meter communication has failed.
When the inverter loses contact with the export meter, it falls back to fixed limiting as a safety measure. This is the single most common cause of unnecessary over-curtailment on SolarEdge systems in the UK.
The CT clamp at the consumer unit must have its arrow pointing toward the grid — not toward the inverter. If the orientation is reversed, the meter reads export as import and vice versa. This causes the inverter to produce more when it should curtail and curtail when it should produce.
Check the RS485 cable between the meter and the inverter communication board — a loose connection causes intermittent communication loss, triggering the fixed-limit fallback. In SetApp or the monitoring portal, the meter status should show as connected with live readings.
Error 3x6E in the event log means the meter is not being detected. Check the meter ID matches the inverter configuration, verify the RS485 connections at both ends, and confirm the meter has power (status LEDs should be lit).
SolarEdge locks export limit configuration behind installer-level authentication in SetApp. Homeowners can view monitoring data but cannot access the export limit, meter configuration, or grid compliance settings. This is a safety measure — incorrect settings can violate your G99 agreement.
If the export limit needs adjusting, it must be done by a qualified installer with SetApp access. If your original installer is no longer available or has gone out of business, STS can reconfigure the system remotely.
If your monitoring shows consistent curtailment during peak hours while household loads are running, the system is leaving energy on the table. STS reviews your monitoring data to quantify the loss, checks the export limit configuration remotely via SetApp, and corrects the settings.
Common fixes: restoring dynamic limiting after a meter communication failure, correcting CT clamp polarity, updating the export limit value to match your DNO approval, reconfiguring after an inverter replacement where original settings were not transferred.
SolarEdge HD-Wave inverters have a documented failure rate, and warranty replacements are routine. The problem is that the export limit configuration lives in the inverter — not in the monitoring portal. When a new inverter is fitted, the export limit must be reconfigured from scratch by the installer using SetApp. If the replacement engineer does not have the original DNO approval documents or does not realise an export limit was configured, the new inverter may ship with no limit (violating G99) or with a fixed limit instead of dynamic.
The homeowner often does not notice immediately because the system is generating again. The curtailment only becomes apparent weeks or months later when someone checks the monitoring data and sees the characteristic flat-line during peak production. By that point, significant generation has been wasted.
This also happens when an installer goes out of business and the homeowner cannot get SetApp access to check or modify the configuration. The export limit settings are locked behind the installer's account, and SolarEdge does not provide homeowner access to these parameters. An independent engineer with their own SetApp installer credentials can take over the system configuration and correct the settings.
We review your monitoring data to quantify the generation loss, check the export limit configuration, and correct the settings — without a site visit in most cases.
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