Solar water heater capable of being used under low-temperature condition

The utility model discloses a solar water heater capable of being used under a low-temperature condition. The solar water heater capable of being used under the low-temperature condition comprises a photovoltaic cell assembly, a cable and an electric heating water tank. The photovoltaic cell assembly is arranged outdoors and is connected with the indoor electric heating water tank through the cable, and the photovoltaic cell assembly is a photovoltaic cell matrix formed through the parallel connection of photovoltaic cells. The solar water heater capable of being used under the low-temperature condition is simple and convenient to use, and capable of being normally used even in cold winter without adopting anti-freezing measures because the water tank is arranged indoors, saves energy, is environment-friendly, and does not waste electricity because the remaining electricity quantity of the water heater can be supplied to other household appliances through conversion after the water heater is used.