Warning What does this mean?

Your system is down or running degraded, but this is not an immediate safety danger. Work through the safe steps below.

SolarEdge Inverter Temperature Too High: Meaning, Causes & Safe Fix

The inverter got too hot and is protecting itself — it reduces output (derating) and may shut down until it cools. Check that air can flow freely around it and the heat-sink fins are clean.

What should I do first?

Two quick questions — we'll point you to the right starting point.

Is this code still showing on your inverter's display?

What this code means

The inverter's internal temperature exceeded its safe operating limit ('Over temperature' in SolarEdge's error table; three-phase codes 8x47, 8x77–8x79 / single-phase 2x11). SolarEdge inverters derate — deliberately reduce power — before shutting down entirely, so brief output dips on very hot days are the protection working as designed.

What is this downtime costing you?

Rough estimate while your system isn't producing. Adjust the numbers to match your setup.

System size (kW) Peak sun hours / day Electricity rate ($/kWh)

–per day

–per week

–per 30 days

≈ – kWh of lost production per day.

Estimate only — assumes ~80% real-world output vs. nameplate. Actual losses depend on weather, shading, panel direction, and your tariff.

Common causes

Blocked airflow around the inverter — stored items, vegetation, or enclosures too close (most common)
Dust, debris, or spider webs clogging the heat-sink fins
Installation in direct afternoon sun on extremely hot days
A failed cooling fan (see Fan Failure) reducing heat dissipation

Safe steps to try

Work top to bottom, ticking off each step as you complete it. 0 of 5 done.

Make sure nothing is stored against or directly around the inverter — it needs clear airflow on all sides.
Visually check the heat-sink fins for dust, webs, or vegetation. Brush debris away gently from the outside only — never open the unit or spray water on it.
Note when it happens: occasional derating on 40°C+ afternoons is normal.
If the inverter has shut down, let it cool, then perform one power cycle (P/1/0 to OFF, wait, back ON).
Monitor over the next hot days — if it happens daily in normal weather, call your installer.

Is your inverter still under warranty?

Before paying for a repair, check — your installer may fix this free.

Brand Year installed

Based on typical standard warranty terms — always confirm with your warranty card or installer paperwork, as terms vary by model, region, and purchase date.

When to call an electrician

Contact your installer if over-temperature shutdowns happen regularly (not just on extreme-heat days), if airflow is clear but the unit runs excessively hot, or if a Temperature Too High warning appears together with a Fan Failure warning.

Frequently asked questions

Will overheating damage my SolarEdge inverter?

No — the inverter derates and shuts down specifically to protect itself. But repeated overheating shortens component life, so fix the airflow cause.

Can I cool the inverter with a hose?

Never spray water on electrical equipment. Clear the airflow path and shade the unit instead — or ask your installer about a shade hood.

Is derating on hot summer days normal?

Yes. Inverters are rated for full power up to a specified temperature (check your datasheet); above that they deliberately reduce output. See SolarEdge's temperature derating note for your model.

Need a professional?

This fault may need professional diagnosis. Contact a qualified solar electrician in your area.

Sources: meaning and troubleshooting verified against the manufacturer's documentation — Troubleshooting SolarEdge Systems, Addendum (Europe & APAC), MAN-01-00333-1.1 — Temperature Too High row ('Over temperature'; three-phase CPU v3.19xx: 8x47, 8x77-79; troubleshooting: 'Verify proper inverter clearances. Make sure the heat-sink fins are clean and unobstructed.').