12/24 V Yacht Electricity

12 volt devices are more plentiful and less expensive. The reason is economies of scale and creating devices for the mass market. The advantage of 24 volts is smaller diameter wire required (less expense and weight). 24 volt motors are about 2/3 the size of 12 volt motors which might be helpful for a large anchor windlass or the starter motor on a very large engine. If you are limited to one system or the other, smaller yachts where you do not have lengthy wire runs you are overall better off with a 12 volt system because of the lower prices (with the exception of wire) and greater selection. As TMS, we specialize in installation and troubleshooting the electrical systems (12/24V) for yachting boats.