The documents in the link help explain three theories for what the power source might be.
Technically, hydro-power is solar energy. That's the input type of energy. Other methods of power generation convert energy, into electricity. There is no excess.
The documents in the link help explain three theories for what the power source might be.
Technically, hydro-power is solar energy. That's the input type of energy. Other methods of power generation convert energy, into electricity. There is no excess.