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 Error 8X1C: Meaning, Causes & Safe Fix

AC voltage too low — the grid voltage on the indicated line dropped below the permitted minimum, so the inverter disconnected. It reconnects automatically once the grid recovers.

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

Your three-phase SolarEdge inverter measured AC grid voltage below the country's permitted minimum on Line 1 (8x1C), Line 2 (8x1D), or Line 3 (8x1E) and disconnected to comply with grid protection rules. This is almost always a grid-supply issue — a local outage, brownout, or tripped breaker — not an inverter fault. The inverter restarts by itself after the mandatory reconnection delay once voltage returns.

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

A local grid outage or brownout in your area (most common)
A tripped solar/inverter breaker in your switchboard
Loose or faulty AC wiring connections
Planned grid maintenance works in the area

Safe steps to try

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

Check your switchboard for any tripped breakers, especially the one labeled Solar or Inverter — reset it once if tripped.
Check whether your neighbors have power, or look up your grid operator's outage map.
Wait — the inverter reconnects automatically a few minutes after stable grid voltage returns (grid codes mandate a reconnection delay).
If the grid is fine and breakers are on but the code persists, perform one full power cycle.
Note the time and duration in case you need to report a pattern to 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

If the grid supply is normal, all breakers are on, and the error persists or keeps recurring, contact your installer to check the AC connections and wiring to the inverter.

Frequently asked questions

Will the inverter restart by itself after a low-voltage error?

Yes. Once the grid voltage is back in range, the inverter waits out a mandatory reconnection delay (a few minutes) and resumes automatically.

Is an 8x1C error my inverter's fault?

Almost certainly not — it means the grid voltage reaching your inverter was too low. Check for outages or tripped breakers first.

How long before it reconnects?

Typically a few minutes after stable voltage returns. Grid codes require this delay to protect the network — it's normal, not a malfunction.

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 — AC Voltage Too Low row (three-phase CPU v3.18xx: 61/62/63, 67/68/69 → CPU v3.19xx: 8x1C/8x1D/8x1E; troubleshooting: 'Verify that the inverter is set to the correct country. Consult the grid operator.').