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The 160kgf and 220kgf bow thrusters are only available with a 24VDC electric motor. By installing a series/parallel switch in a 12V main power supply system, a 24V bow thruster will work using 12V batteries connected in series, therefore obtaining the required 24V. Also for charging, the 12V batteries are automatically connected in parallel and linked to the 12V charging system.

This series/parallel switch comes complete with pre-assembled auxiliary relays to ensure easy connection between the battery bank and the bow thruster.

When the installed batteries for the bow thruster are also used for other 12V consumers, it should be remembered that the current is supplied via the charging contacts of the series/parallel switch.

These contacts have a continuous duty rating of 100A, and an intermittent 20% rating of 150A.

Therefore, they should never be used as starter batteries and anchor windlasses should never be connected to them. The series/parallel switch functions completely automatically, so the bow thruster is operated as usual. The 285kgf – 48VDC bow thruster has a series/ parallel switch supplied as standard so as to permit connection to a 24V battery bank.
This 48V series/parallel switch is also available separately (code: BP3008). The series/parallel switches meet the EMC requirements.