Energy Systems & Design has been producing microhydro turbines since 1980. Their turbines use 4” pitch diameter bronze Turgo runners. Brushless alternators offer many advantages including an adjustable field to provide the most efficient output over a range of pressures, and lower maintenance as there are no more brushes requiring replacement.
It can produce over 700 kWh per month. The Turgo design allows larger jets and thus is used in situations that require a lot of water flow. It can be equipped with up to four universal nozzles that are adjustable with threaded inserts from 1/8 to a maximum of one inch.