No need.
In rural areas, almost every household has a self-built water tower and no certificate is required.
Although rural people now drink tap water from the tap water company, because the water pipe network installed by our rural tap water company is far away in some places , when the water consumption reaches its maximum, the pressure is not enough and the water source is small, especially It is a hot summer and the water consumption is large. The company's tap water cannot meet the pressure requirements for flushing toilets, so a tap water tank is installed on the roof to save water and ensure the water consumption. and pressure at home. Additionally, many homes in rural areas have installed solar panels, which can use power equipment.generating solar energy to burn hot water and store it in water towers, allowing family members to wash and wash their clothes.
In addition to solar energy, what can generate electricity at home?
The current for charging the battery is generally 5 to 6 amps, which is more suitable if you are charging a. 12 volt battery at a time, the motor power should be at least about 100 watts (the power reserve must be taken into account) and 12 volts.
You can calculate it like this:
Water flow (kg/s) multiplied by the acceleration of gravity (9.8 Newton/kg) multiplied by the water impact height = power
Flow = pipeline cross-section multiplied by flow rate and divided by the specific gravity of water.
Generators of the same model are connected in parallel, as long as the power sum is sufficient.
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The charging time of the batIt depends on the battery capacity and charging current.
There are many, but most families don't have the conditions.
Wind energy production, human energy production (foot energy), animal energy production... Others are not suitable for households, such as tidal energy production, waste energy production, solar thermal energy production, biomass energy production, etc.
Of course, if you don't care about water bills, there is a more feasible way to generate electricity: tap water hydropower, but the water bill water will be higher than the electricity bill.