Quick search turned this up. Looks like boats use them for lighting.http://www.victronenergy.com/upload/documents/Datasheet%20-%20Orion%20DC%20DC%20converters%20-%20rev%2013%20-%20EN.pdfhttp://shop.pkys.com/victron-orion-12-24-10-dc-dc-converter.aspxIf that works, i might grab the extras you have.