Holtdoa

I am planning to use a 12 volt to 15 120 watt converter between my power supply (usually going to be battery) and the mount. My reasoning is I want to be able to accommodate different battery systems without worrying about under voltage issues. The converter is touted as high efficiency, so.... One caveat, I'm an engineer so I'm comfortable with insuring correct polarity and what not. All the reasonably priced converters I've found are definitely aimed toward folks that like to tinker, definitely not plug and play.