The stop switch is used to shut down the wind generator if it is not to be operated or to prevent starting of the rotor when working on it. Wiring the stop switch is not obligatory if a charge regulator has been installed.

When using the Superwind on a boat or a sailing yacht, the stop switch is strongly recommended to shut the wind turbine down in heavy weather at sea. Spray and waves, parts detached from the rigg or from the sails etc. could touch the rotor. Furthermore in such situations the restricted mobility on board increases the risk of accidentially touching the running rotor.

If the system is operated without charge regulator, a stop switch is necessary. In this case charging must be continuously supervised by the operator and terminated when the battery is fully charged. The stop switch disconnects the Superwind from the battery and simultaneously shuts down the rotor. The stop switch must be installed in the line between the wind generator and the battery as close to the wind generator as possible. In this line between wind generator and stop switch fuses or circuit breakers must not be installed.