Stiga Real‑Time Clock / Backup Power Issue

Robot mower’s time and date reset frequently, causing schedule issues.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Weak internal backup battery on main board, Firmware bug, Power interruptions during charging, Faulty main PCB

Safety first: Turn OFF the mower before opening covers.

Check main battery: Ensure the main battery is healthy and the mower charges fully; very low voltage can reset the clock.
Stable power: Avoid frequently unplugging the station; keep it powered continuously.
Firmware update: Ask a Stiga dealer if a firmware update is available to fix known clock issues.
Board service: If the internal RTC backup cell has failed, the main board may need replacement.

Hard 4/5

Main Control Board

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