This isn’t something you see everyday at your favorite chandlery, but it may be a necessity if you are upgrading your boats electrical system to 24 volt. Why would you do this? Well, because if you have big current draw devices like electric winches and a windlass, doubling the voltage cuts the amperage in half—meaning you can downsize wiring and/or have longer cable runs without excessive voltage drop. Sounds good, you say? Well once you’ve switched over to a 24 volt battery bank (and inverter, generator, high output alternator, etc.) you are still likely to have some equipment that only cares for 12 volts. This is where a 24 to 12 DC voltage converter comes in handy. It doesn’t have to be super powerful…just enough amps for the legacy equipment on-board. Of course, you’ll want to be extra careful not to mix up those circuits!

Link: http://www.newmarpower.com