The wind turbine power of 300 W is too low. \x0d\Generator - when the rotor intersects the magnetic lines of force in a rotating magnetic field, free electrons are generated under the action of voltage, the free electrons flow from high potential to ground potential --- a current is generated. Therefore, a 48V power supply must have a stable supply above 52V to charge it. When the no-load voltage is 56V, when the 48V electric vehicle battery is connected to charge, the 300W wind turbine will have insufficient capacity and. the current will flow to the battery instantly, the free electrons (current) generated by the 300W wind turbine cannot respond to the battery power supply, so the voltage will drop instantly when lower than the battery voltage , battery current flows. into the generator in the reverse direction, causing the generator to operate, i.e.that the above phenomenon occurs. \x0d\To be improved\x0d\1 Increase generator power\x0d\2 Adjustable boost regulator\x0d\.
Not possible:
1. There are no permanent magnets. in the fan motor
2. The blades of the Coke can are not strong enough to support the rotation of such a large motor.
3. Do existing water pumps use mains power? In this case, your generator must have a sinusoidal AC output. Since the wind is unstable, it must also have a battery to store electrical energy and have a voltage stabilization function. The output power should be greater than the water pump power.
Because it does not conform to the law of conservation of energy, I think your conditional method is impossible to succeed.