Abstract: Use of a range extender vehicle includes a range extender energy store and means for transmitting energy to a main vehicle for supplying a main vehicle, including a main vehicle electric motor for driving the main vehicle, a main vehicle energy store for supplying the main vehicle electric motor with power and means for obtaining energy from the range extender vehicle, with energy from the range extender energy store via the coupled-together energy transmission means and means for obtaining energy. The range extender vehicle also includes: a range extender electric motor for driving the range extender vehicle; means for autonomously driving the range extender vehicle on a road network; and receiving means for receiving information for detecting the main vehicle. By means of the invention, the mobility, in particular the range, of electric vehicles can be improved in a simple and comfortable manner.

Abstract: A mobile energy system (MES) can absorb, temporarily store and restore electric energy through connection to the house network. The energy can furthermore be released at the location of charging, at other locations or while driving. This offers the possibility of operating stationary or mobile quick charging stations also at locations which permit only small power output. By coupling the systems via a cloud, functions of a virtual power station can be performed.

Abstract: A microcomputer-controlled programmable time switch has a display for the acutal time and other functions. The other functions are obtained through easily understood legends, with keys for each individual function and with keys for the input, indication and erasure of time-dependent data and for the actuating of the switch independently of the time. If the sequence of operation is not arbitrary, the microcomputer guides an operator through the operating sequence by flashing the indicator lights required for the data readout or data input.