Optimiser offline, arc fault light, no production — we diagnose SolarEdge systems remotely in a single session.
Book your free remote diagnosticSafety: If the arc fault light is active, do not reset more than once — isolate at the AC and DC switches and call us first.
What an Amazing service and so helpful . I have had problems with a faulty GivEnergy inverter and Ron has been so diligent in investigating and reporting on it . I’d give him more than 5 stars if I could for his help in diagnosis and potential solution. Thoroughly recommend .
Very pleased with solar tech support , they were very informative and helpful , arrived when they said they would and did a great job , I would highly recommend them .
Excellent response to diagnose a problem on our SolarEdge installation. Kept us informed at every step. Diagnosis quickly completed and solution implemented.
Called back within a day and gave good advice.
Ronald was great to help me sort out my giv energy inverter issue since company has gone bankrupt in april 26.
After GivEnergy went into liquidation, just my luck, my battery started playing up (internal board crashed). Contacted my installer - not interested! Found Solar tech support on a Google search. Sooo glad I found this company! Ron is extremely helpful and has plenty of experience. He soon confirmed what the fault was, and helped me to get my system up and running again. Now moved my GivEnergy account to Solar tech support, and will definitely use again if I have more issues. Unusual to find such a helpful company in these times, no morons reading scripts, just direct contact with the engineer.
Every fault below has a proven diagnostic path. Click through for the specific page or book a diagnostic if you're unsure.
Inverter powered on but generating nothing. Usually DC string fault, optimiser failure, grid disconnection, or AFCI trip. Each optimiser works independently — one failed unit reduces output but rarely stops everything.
See diagnostic guide →SolarEdge HD-Wave inverters display error codes on the LED panel and in the SetApp. Codes beginning with 'G' indicate grid faults. 'OP' codes indicate optimiser communication failures.
See diagnostic guide →The arc fault protection circuit has interrupted DC power. This is a safety event — not an arbitrary trip. Common causes: damaged DC cable insulation, corroded MC4 connector, or failed optimiser. Requires investigation before reset.
See diagnostic guide →HD-Wave models (SE3000H–SE6000H) from 2017–2020 batches have higher failure rates. All LEDs off, thermal shutdown, or zero AC output. Covered by 12-year warranty — we handle the claim and coordinate the replacement.
See diagnostic guide →An N/A in the SolarEdge portal means the optimiser isn't communicating. Could be a failed unit, loose DC connector, or shading causing low Vmp. We identify which optimiser is affected and whether it needs replacement.
See diagnostic guide →Optimisers communicate over the DC power line (PLC). A wiring error, damaged pair, or incompatible optimiser firmware version can break the communication chain for part or all of a string.
See diagnostic guide →SolarEdge allows panel-level output comparison in the monitoring portal. Underperformance is usually caused by one or more optimisers degraded, soiled panels, or partial shading configuration error.
See diagnostic guide →The SetApp dashboard or SolarEdge monitoring portal shows no data. Causes: inverter comms module offline, ethernet/WiFi drop, or portal outage. The inverter may still be generating even when monitoring is dark.
See diagnostic guide →SolarEdge monitoring devices require 2.4GHz WiFi. After a router change or WiFi password update, the communication module needs reconfiguring. We walk through the SetApp reconnection process.
See diagnostic guide →SolarEdge displays fault codes in the monitoring portal and on the SetApp. Common error prefixes: 'G' (grid faults), 'OP' (optimiser communication), 'AFCI' (arc fault detection), 'AC' (AC side faults). Share your exact code when you book — we identify the root cause using monitoring portal data and SetApp logs.
We review SetApp data, monitoring portal history, and error codes to identify the exact fault remotely.
Installer gone bust or locked out of the SolarEdge portal? We recover access and transfer monitoring account ownership.
SolarEdge inverter lost WiFi after a router change or password update? Reconnect via SetApp or SolarEdge Go and restore monitoring.
G99 export limit curtailing too much? Dynamic vs fixed limiting, CT clamp orientation, meter communication faults.
Optimiser replacement, DC cable fault location, arc fault investigation, CT clamp correction.
Download datasheets, installation manuals, warranty documents and monitoring guides for SolarEdge HD-Wave inverters, optimisers and StorEdge batteries. Self-hosted and always current.
SolarEdge is the UK's largest solar inverter brand by installed capacity. Unlike conventional string inverters, SolarEdge pairs each panel with a power optimiser — a DC-DC converter that maximises output from each module independently. The inverter then operates at a fixed input voltage (the SolarEdge 'HD-Wave' principle), which improves efficiency and makes the system safer to work on (DC strings run at a fixed 1V when the inverter is off). The monitoring portal provides panel-level output data — a significant advantage for fault diagnosis.
The most searched SolarEdge issues we see are: SolarEdge not producing, SolarEdge arc fault, SolarEdge optimiser not communicating, SolarEdge monitoring offline, and SolarEdge installer gone bust. SolarEdge systems are commissioned using SetApp — a mobile tool that replaces the traditional display. If your installer didn't complete commissioning or you've lost access, we recover and verify the configuration. STS provides independent SolarEdge support across the UK — not affiliated with SolarEdge Technologies Inc.
STS supports all major inverter and battery brands — not just SolarEdge. If you have a mixed-brand system or are comparing options, visit the brand hub.
Browse all 19 brandsTell us the fault code or describe what you're seeing — monitoring portal dark, arc fault light, optimiser N/A. We'll identify the cause and give you a clear path.
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