MorningStar two battery solar charge controller with temperature sensor and remote digital meter. This Kit is Ideal for any battery system that has two independent battery banks, or two batteries that are used for different purposes. The SunSaver Duo will independently charge both house and engine batteries, with priority user setable. Choose between a 50/50, and a 90/10 split in charging value. This feature is easily programable by the end user, and can be easily switched. The included digital remote meter displays digitial and pictoral system information, including state of charge, ambient temperature at controller, and available solar power in amps. Digital display is backlit for easy viewing. Will work on panel systems up to 25 amps.This all inclusive package is everything you need between your solar panel and your battery. Even includes mounting screws! *Flat Rate shipping is for the lower 48 states only.