Morningstar's TriStar TS-45 is a 3-function controller that provides reliable solar battery charging, load control, or diversion regulation. It features Pulse Width Modulation (PWM) and is ideal when upgrading older PV systems with 36-cell or 72-cell panels, or for hydro or wind systems when load diversion is needed. The Morningstar TriStar TS-45 Charge Controller is rated at 45 amps at 12V - 48V.