MultiPlus-II External Transfer Switch application

Reduce installation time and costs: This reduces costs and installation time, especially for large systems with multiple units in parallel. It removes the need to wire each unit's AC input and output terminals.

Reduce equipment costs: Combining MultiPlus-II 8, 10, or 15kVA units with an external transfer switch lifts their "no parallel" restriction. Otherwise, the more expensive Quattro 8, 10, or 15kVA units would have been required.

Flexible installation: MultiPlus-II units and batteries can be placed up to 20 meters from the main distribution board without running power wiring back and forth.

No Bypass Switch Required: Eliminates the need for a separate bypass switch.

AC transfer rating: 100 or 400A.

Unit limit: Up to 12 MultiPlus-II units, with a maximum of 4 per phase.

System size: Up to 180kVA.

AC input: Supports only one AC input source.

AC input type: Generator or grid AC input. For a full list of countries where grid connection is approved, see the Grid code certification country list section.

Firmware: Requires application-specific VE.Bus firmware, version S99.

Hardware: Additional hardware is required; refer to the Hardware requirements list.

External transfer switch: Standard contactor.

Ground relay: High current single-pole relay.

Ground help relay: Low-power 230V relay with a 24V coil, enabling the MultiPlus-II low-power control signal to drive the high-power ground relay.

Victron Current Transformer(s): One per phase, rated at 100 or 400A, for accurate current measurement and power management.

Four-pole circuit breakers and RCD: For circuit protection.

Electrical wiring: Refer to the Installation chapter for detailed instructions.

Ziehl UFR1001E relay: Required for certain grid-connected systems. Refer to the Grid code certification country list to determine if it is necessary.