There are water heaters that can be plugged in and run on solar energy, which are dual-use solar water heaters. The water heater itself has a supplementary electric heating function, and the electric heating power is between 1500W and 3000W.
In addition, add a tee to the outlet of water under solar energy, and connect gas or electric water heater in parallel. When solar energy has hot water, use solar water directly. use a gas or electric water heater for supplemental heating.
Which is better: dual-use solar electric water heater or air-to-energy water heater? It is safer, more energy efficient and has a longer lifespan?
When the weather is bad? this is good, there is no need to turn on the electricity for heating, only when the weather is bad. When the water temperature in the water tank is not sufficienthigh, electric heating is necessary. First of all, the water temperature of the water tank should be determined based on the weather conditions. When the weather is good and the water temperature is high, the water tank should be filled, and it should be refilled at any time to avoid. the formation of scale if the water temperature is too high. When the weather is bad, the water temperature is not high, just add half. In this way, when the water temperature is not high, the water temperature will increase. a short time when the device is turned on, saving energy and time. It is best to install a water temperature and level indicator, so that you can check the water level and water temperature in the water tank at any time for easy use.
Solar electric water heaters are really averages. When it's hot, even though solar energy is sufficient, it doesn't require as much hot water. In cold weather, more hot water is needed, but solar power cannot provide much hot water, which means a lot of electricity. is still necessary.
Air water heaters are relatively better. They work on the same principle as air conditioners, expending energy to transport heat from one place to another, much like using an airplane to transport nuclear fuel. The efficiency of air-energy water heaters can exceed 100%. Now the air conditioner can achieve 1:6, that is, 6 degrees of heat can be obtained using 1 kilowatt hour of electricity. Air energy should be similar, but the technology continues to improve.
Air water heaters are therefore more energy efficient, unless you live in the tropics or on the Qinghai-Tibe plateaut (in these areas just use solar power directly and almost no electricity is needed).
As for safety and longevity, only the manufacturer knows