Victron MPPT Err 67 BMS connection lost. I don't even have a BMS. What now?

The short answer

Check the charger-BMS link; with no BMS, set LCD setup 31 BMS to N or factory-reset in VictronConnect.

Plain explanation

From the Victron manual for the SmartSolar MPPT: Check charger-BMS connection. If no BMS: LCD setup 31 BMS Y → N or factory reset in VictronConnect. Installer only: DC and AC work on a live PV system is dangerous, so owners should note the code and call their installer.

Steps from the source

Check charger-BMS connection
If no BMS: LCD setup 31 BMS Y → N or factory reset in VictronConnect

Source

Victron MPPT / charger error codes (official docs), Err 67www.victronenergy.com ↗

Where installers ask this

MPPT 250/100 Error #67 No BMS (r/Victron)
reddit.com/r/Victron/comments/1n9zvfw/

General guidance based on the manufacturer's manual or the named source. Always follow the current manual for your exact model and your national code. DC and AC electrical work is for qualified installers only. Not affiliated with or endorsed by any brand named; trademarks belong to their owners.