This is a complete Hydro Generator System. Includes the charge controller and dump load features to keep the output at 120 VAC, 60 Hz, Single Phase, independent of the speed and load. Designed for 5-20 meter head (height)(16 to 65 foot water height). The recommended water flow is 3-5 liters per second, which is 50-80 gallons per minute. The output power is 300 watts continuous. Adjustable valve for setting the output power. The generator is a Permanent Magnet type with very little cogging torque. Comes complete with a manual that includes an installation guide. Just add water.