Morningstar's TriStar MPPT 600V charge controller leverages Morningstar's innovative TrakStar™ MPPT technology and our 20+ years of power electronics engineering excellence, to enable the widest input operating voltage range available from a solar array, wind turbine or hydro input. This controller's standard and DB versions are for off-grid applications, and the TR versions were developed to enable retrofitting grid-tied systems with battery backup.