SolarEdge Inverter Support — Optimisers, Arc Faults & Monitoring
Optimiser offline, arc fault trip, no production, monitoring portal dark — we diagnose SolarEdge systems at the engineering level. Remote-first using SetApp data and monitoring portal history. Independent from SolarEdge and from your installer.
Optimiser offline, arc fault light, no production — we diagnose SolarEdge systems remotely in a single session.
Diagnostic from £75 → Learn about our Solar Health PlanSafety: If the arc fault light is active, do not reset more than once — isolate at the AC and DC switches and call us first.
Common SolarEdge problems we diagnose
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 error codes explained
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.
What we do for SolarEdge owners
Remote SolarEdge Diagnostic
We review SetApp data, monitoring portal history, and error codes to identify the exact fault remotely.
SolarEdge Monitoring Recovery
Installer gone bust or locked out of the SolarEdge portal? We recover access and transfer monitoring account ownership.
WiFi Reconnection
SolarEdge inverter lost WiFi after a router change or password update? Reconnect via SetApp or SolarEdge Go and restore monitoring.
Export Limit Configuration
G99 export limit curtailing too much? Dynamic vs fixed limiting, CT clamp orientation, meter communication faults.
On-Site SolarEdge Repair
Optimiser replacement, DC cable fault location, arc fault investigation, CT clamp correction.
SolarEdge datasheets, manuals & warranty PDFs
Download datasheets, installation manuals, warranty documents and monitoring guides for SolarEdge HD-Wave inverters, optimisers and StorEdge batteries. Self-hosted and always current.
SolarEdge fault code index
Seeing an error code on your SolarEdge inverter? Our fault code index explains what each code means, common causes, and safe next steps.
About SolarEdge systems — what you need to know
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.
SolarEdge questions answered
The most common causes are a tripped AC or DC isolator, a power optimiser not communicating, an arc fault detection trip, or grid disconnection. We identify the specific fault path remotely using monitoring data and error logs. Check the inverter display for error codes and book a diagnostic if the cause isn't clear.
Arc Fault Circuit Interrupter (AFCI) detection is a SolarEdge safety feature. A trip means the inverter detected abnormal current patterns on the DC string — typically a damaged cable, poor connector, or optimiser fault. Do not reset repeatedly without identifying the cause.
An N/A optimiser in the SolarEdge monitoring portal usually means the optimiser has failed, lost DC power, or the string has an open-circuit fault. Each optimiser is a separate component — one failure does not affect the others but reduces overall output. We identify the specific unit and cause before recommending replacement.
Check the inverter display for an error code. If the inverter is running but the portal shows no data, the communication module (ZigBee or ethernet) may have lost connection. If the inverter is offline too, check AC and DC isolators are closed. We can reconnect the monitoring device remotely in most cases.
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 brands →Ready to fix your SolarEdge system?
Tell 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.