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 8X10: Meaning, Causes & Safe Fix

Communication error — the inverter's internal processor lost contact with its own components. Try one full power cycle; if it comes back, your installer or SolarEdge support needs to diagnose it.

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

Error #49 (shown as 8x10 on three-phase inverters with CPU v3.19xx firmware) means internal communication between the inverter's processor and its sub-components has failed. The inverter cannot operate safely without this internal link, so it stops production. SolarEdge's manual lists the remedy simply as 'Contact SolarEdge support,' which tells you this is not a homeowner-diagnosable fault beyond a restart.

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 firmware glitch or crashed internal process (most common — often clears with a restart)
An internal communication hardware fault
A failed or interrupted firmware update

Safe steps to try

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

Write down the exact code and your inverter's serial number and firmware version (from the monitoring portal or the inverter label).
Perform one full power cycle: P/1/0 switch to OFF, wait until DC voltage drops below 50V (or 5 minutes), DC disconnect OFF, AC breaker OFF, wait 2 minutes, then switch back ON in reverse order (AC, DC, P/1/0).
Wait for the full start-up sequence to complete in daylight.
Check the monitoring portal — is the inverter reporting data again?
If the error clears, watch for recurrence over the next few days and note the pattern.

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 error returns after a power cycle, contact your installer or SolarEdge support with the code, serial number, and firmware version. Internal communication faults need professional diagnosis — they can indicate failing hardware or require a firmware reflash.

Frequently asked questions

Will I lose my solar production data?

There may be a gap in your monitoring data while the inverter was down, but the portal keeps all previously recorded history. New data resumes once communication is restored.

Will a restart fix error 8x10?

Often yes — many communication errors are one-off firmware glitches that clear with a full power cycle. If it returns, though, don't keep restarting; get it diagnosed.

Does this mean I need a new inverter?

Not necessarily. It can be a firmware issue fixable by support. But repeated communication errors can signal failing internal hardware, which is why SolarEdge wants support involved.

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 — Communication Error row (three-phase CPU v3.18xx: 49 → CPU v3.19xx: 8x10; troubleshooting: 'Contact SolarEdge support.').