Which is better, solar energy or water heater in the north? Talk about their respective advantages.

First, talk about water heaters, which can be divided into solar water heaters, gas water heaters and electric water heaters. Talking about solar energy, the advantages are energy saving and environmental protection, and it can be used for more than ten years at a time. Its disadvantage is that it needs enough sunlight to produce hot water. In case of continuous rainy weather, it's just decoration and can't produce hot water. Re-gas water heaters, gas water heaters are divided into two types: volumetric gas water heaters and rapid gas water heaters. The advantage of gas water heater is that it can produce hot water continuously as long as there are sufficient gas and water sources, but the disadvantage is that it can not achieve energy-saving effect and the failure rate is high. Finally, talk about electric water heaters. Electric water heaters are also divided into two types: volumetric and rapid, with the same advantages and disadvantages as gas water heaters.

To sum up, I suggest that you can consider installing a solar water heater first, and then installing a gas water heater or an electric water heater, which is enough to complement each other. Through this device, it is perfect in that field. Mace is afraid of injury.