solarsynthesis solar charge controller waterproof, 5a solar panel controller 6v/12v auto 24hours load on ip67 waterproof solar controller for lead-acid battery charge and discharge control solarsynthesis mini size waterproof solar charge controller for small power system, ip67 waterproof rating make it well suited for outdoor use battery voltage: 6v/12v auto; rated charge & discharge current: 5a; maximum power of solar panel: 30w for 6v battery, or 60w for 12v battery easy to install and operate; load on 24 hours; smart pwm technology, high efficiency prevents the battery from over charging, over discharging and reverse discharging to solar panel at nights