It costs around 1,800 yuan and the price varies depending on the amount of energy produced. Generally, it can provide electricity for lighting for a family of three and can be used for a few hours on a computer.
Solar water heater is a device that converts solar energy into thermal energy, heating water from low temperature to high temperature to meet people's use of hot water in life and production. Solar water heaters are divided into vacuum tube solar water heaters and flat panel solar water heaters based on their structural shapes. Evacuated tube solar water heaters are mainly used, accounting for 95% of the domestic market share. Household evacuated tube solar water heaters are composed of heat collecting tubes, water storage tanks, brackets and other related parts. Solar energy conversionin thermal energy mainly relies on vacuum heat collector tubes which use the principle of hot water floating. and cold water flows to cause microcirculation in the water.
It depends on the water conditions of the river.
The price of the unit also depends on the capacity.
Currently, the cost of building a power plant is 7,000 to 8,000 yuan per kW for good conditions, and tens of thousands of yuan per kW for poor conditions.
After operation, the price of electricity also depends on the price applied by the regional electricity network. For small power plants, it is basically around 0.2 yuan/kW.