Cesc error codes

36 codes documented in Cesc's inverter and battery manuals. Pick yours to see what it means, what you can safely check, and when to call your installer.

WattMate is not affiliated with Cesc. This page summarises Cesc's own published documentation; your installer and Cesc are the authority on your system. WattMate doesn't repair systems or make site visits.

Battery codes

Find the Cesc manual for your model

When to call your installer or the warranty line

Your installer is your first warranty contact. If they've gone, the manufacturer's warranty line still covers the hardware. Don't open the inverter or battery case yourself: work inside it is for a licensed electrician.

If you see smoke, scorch marks or smell burning, switch the system off at the AC and PV isolators and call your installer. If anyone is in danger, call 000.

We don't have a warranty line on file for Cesc yet. See the manufacturer contacts we do hold, or ask your installer.

Try the free fixes first
Most faults are an isolator, a WiFi drop or a known error code. Start with the lookup and guides above.
Then call the people who are responsible for it
Your installer is your first warranty contact. If they've gone, the manufacturer's warranty line still covers the hardware.
Find the manufacturer's warranty line
If it's near the end of its life, see what replacing it would do
A free energy audit report sizes a new system for your actual bills and shows what a replacement would do. Your first results need no details; your details only reach installers if you ask for the full report.
Get your free energy audit report

Battery codes

When to call your installer or the warranty line

Try the free fixes first

Then call the people who are responsible for it

If it's near the end of its life, see what replacing it would do