30 Amp 5-Stage Deluxe Digital PWM

30 Amps is large enough for up to 510 Watts of 12 volt solar charging power. Each controller has PWM (Pulse Width Modulation) and 5 stages of charging for best battery health and longevity. Two mounting options, flush or surface, provide options and flexibility. Each Zamp Solar 30A solar charge controller supports, and is programmable for 4 typical types of deep cycle batteries (WET, GEL, AGM and Calcium) as well as lithium batteries (LTO and LifeP04).