According to calculations, using 1 square meter of solar water heater is equivalent to saving 310 kilowatt hours of electricity per year. The cost of solar water heaters is only one-seventh that of gas water heaters and one-sixth that of electric water heaters. Using solar water heaters is economical and affordable. The one-time investment in purchasing a solar water heater is about 3,200 yuan, and the investment can be recouped within 4 years. Calculated on the basis of a device lifespan of 15 years, its economic advantages are very obvious. In recent years, real estate development in our district has been on an upward trend. In 2006, the urban real estate development area reached 1.83 million square meters. If the use of solar water heaters is promoted according to scientific and reasonable methods, 430,000 square meters of solar heat pipes (pieces) can be installed, covering 22,000 familiess and more than 70,000 people, and the annual electricity consumption can reach 132 million kilowatt hours. .
It's actually not absolute. It mainly depends on the price, comfort and possibility of installing the site. From low cost to high cost, consider: electric water heater, solar and air. energy.
High to low electricity bills throughout the year: electric water heater, solar energy, air energy (the prerequisite here is that the winter is long and a solar electric auxiliary heater will be used)
Electric water heater The cost is the lowest, but it only uses electricity all year round and the heating time is roughly 30 minutes for a person to wash. The advantage is that there are no requirements. facility. If you choose to buy, consider choosing big brands, like Changhong, Midea, etc. !
The advantage of solar water heaters is thatThey save electricity. When the sunshine is good, they will save a lot. However, if lighting conditions are not good, electric supplementary heating is necessary. The warehouse is used, the power consumption will be relatively large, but it can use Sancang solar energy equivalent to solar energy + electric water heater. It's more profitable if there is a lot of sun!
In summary, as long as there is a place to install solar energy, I personally recommend choosing a three-bay solar water heater. This saves money and you don't have to worry about water temperature. The after-sales rate is lower than that of a single warehouse, and water and electricity are practically separated!
The above is my personal experience working in Hunan Jiangyue New Energy (14 years of solar and air power machine accessories wholesale) andis for reference only.
Recommended "Dr. Sun" solar power (combination of solar power + electric water heater, lower electricity bills), three barrel model (no need for water level detection probe and solenoid valve), rapid heating and hot water use in rainy days, and the after-sales rate is also greatly reduced, saving time and energy. This model only takes 20-30 minutes to heat without sunlight, while a single warehouse takes 2-3 hours! p>