Fronius Backup Controller 3P-35A

The Fronius Backup Controller is a switching unit that enables an automatic transition to full backup mode. In the event of a power cut, it automatically switches to emergency power mode and back to grid-parallel operation as soon as the grid is available again. This solution ensures that the entire household is always reliably supplied with power, provided there is sufficient energy available from the PV system or the battery storage – even when nobody is at home. The Fronius Backup Controller will initially be available as a 3-pole variant rated at 35A. A 4-pole variant will follow in the first half of 2025.

Automatic solution for maximum safetyEnsures the power supply to critical equipment even when no one is at homeQuick and easy installation on a DIN rail in the control cabinetAutomatic return to normal operationType of grid disconnection: 3-poleMax. cable cross-section: 10 mm² (push-in terminals)Automatic switchover including FRT function in accordance with EN 50549-10 (monitors the voltage at the grid connection point and ensures uninterrupted operation in the event of grid faults such as voltage dips).Compatible with all Fronius