The present invention provides an AC-DC dual-purpose high-power electric
water heater. The AC-DC dual-purpose high-power electric
water heater is composed of two portions including an electric
water heater basic device and a control device. The electric water heater has the structure that a water heater inner container and an inner container seal cover are disposed in a cylindrical heat insulation electric water heater housing, an
electric heating pipe, a temperature controller and a snap action temperature
limiter are disposed in the inner container, a lower part of the housing is provided with a water inlet, a water outlet and a
sewage draining exit, and the front side of the water heater housing is provided with a heating indicating lamp and a temperature display. The control device is installed between the inside of a side cover of the water heater and the inner container seal cover, the snap action temperature
limiter, the temperature controller, a DC operation
relay and a filtering
rectifier are disposed in the control device, on and off of the
electric heating pipe are controlled by the DC operation
relay, and a power line stretches out of the cylindrical housing and is electrically connected with a power plug. The electric water heater is AC-DC dual-purpose, and on and off of the
electric heating pipe are controlled by the DC operation
relay without arc
discharge. The electric water heater is suitable for office and household use, and especially suitable for DC
photovoltaic power generation household use.