Water heaters are a cleaning appliance in the daily life of modern families, which can provide hot water for daily use of daily life, while the water heater with auxiliary electric heater is not better than the price. It mainly includes electric water heaters, gas water heaters, solar water heaters, air-source water heaters, etc., especially solar water heaters, safety, energy saving, environmental protection and economics with assistive electric heating. Solar water heaters equipped with small space heater auxiliary electric heaters can be used all year round. Nowadays, in progress, people’s life concept has also been greatly improved. Nowadays, safety, efficiency, energy saving, and become the ultimate goal of people, rather than deciding to purchase standards with the price of auxiliary electric heater. With the development of electronic technology, social development has entered the information age, and the information age has higher requirements for high-quality and informationization of talents, which makes consumers when they buy solar water heaters with auxiliary electric heaters. Measure everything in the price. So, the water heater with auxiliary electric heater is not better than the price, but consumers pay more attention to the quality, performance, function and service of the water heater.