Voltage Positive Switch Box

The Lewmar Voltage Positive

Switch Box is a dedicated thruster accessory designed to ensure safe, stable electrical switching within Lewmar bow or stern thruster systems. Built specifically for vessels where voltage conversion or controlled power delivery is required, it provides dependable protection and control during manoeuvring.

Optimised for Smooth Electrical Performance

Engineered to work alongside Lewmar’s single or dual thruster controllers, the switch box enables safe operation of higher-voltage thrusters on lower-voltage electrical systems. This capability ensures consistent thruster responsiveness and reliable power transfer when you need precise control in tight harbours or challenging wind and tide conditions.

Durable, Marine-Grade Construction

As part of Lewmar’s thruster accessory lineup, the Voltage Positive Switch Box is built to withstand demanding marine environments. Its solid construction ensures long-term reliability, maintaining stable electrical switching performance across both sail and power vessels. 

Quiet, Efficient Power Management

By managing voltage and switching logic internally, the unit supports efficient electrical operation and helps maintain consistent thruster behaviour. This results in smoother lateral adjustments and quieter overall system performance, ideal for low-speed manoeuvring in busy marinas.

Straightforward Installation & System Integration

Designed for compatibility with Lewmar thruster systems, the switch box integrates cleanly into existing setups and supports both positive and negative switching configurations. It enables safe usage of a 24-volt thruster on a 12-volt boat, or vice versa, making it a versatile solution for retrofit or upgrade installations.

Additional batteries may be required depending on thruster voltage.