If you want to replace it, you need to replace the power part, and the price is not as high as buying a new generator directly!
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The current to charge the battery is generally 5 to 6 amps. If you charge one 12 volt battery at a time, the motor power should be at least around 100 watts (the power reserve should be around 100 watts). considered), and it should be 12 Volts.
You can calculate it like this:
Water flow (kg/s) multiplied by the acceleration of gravity ( 9.8 Newtons/kg) multiplied by the water impact height = power
Flow = the cross-sectional area of the pipeline multiplied by the flow rate and divided by the gravityspecific water ity.
Generators of the same model are connected in parallel, as long as the combined power is sufficient.
Battery charging time depends on capacity battery and charging current.