If the 10KW generator is a synchronous generator, it has an efficiency of 80% to 85%, but the efficiency of the asynchronous generator is only about 70%. Then consider the impact of the motor starting current on the generator, and ensure the normal operation of the water pump motor. Below, the water pump motor should not exceed 5.5 kW.
51.02 cubic meters of water. 10 kWh = 10 kW × 1 hour = 10,000 Joules, flow = energy ÷ density ÷ acceleration ÷ square flow ÷ 2 = 10,000 ÷ 1,000 ÷ 9.8 ÷ (0.12/2) = 51.02 cubic meters, therefore 10 kilowatts of hydroelectricity production. The machine requires 51.02 cubic meters of water per hour.