Modular power supply apparatus

A modular power supply apparatus comprising:

• a. a rechargeable energy storage device having at least one energy storage element,
• b. a grid connection for an AC voltage source,
• c. a first output and a second output, to each of which external electrical loads are connectable, and
• d. a switching device, by which
• the grid connection can be electrically connected to and disconnected from the second output,
• the energy storage device or a first energy storage element of the energy storage device can be electrically connected to and disconnected from the second output, and
• e. a base part and a portable part couplable thereto and detachable from the base part, and wherein
• the portable part comprises the energy storage device or the first energy storage element of the energy storage device and also the first output, and the portable part is configured to the effect that the energy storage device or the first energy storage element can supply the first output with an electrical voltage,
• the base part comprises the grid connection, the switching device or a part of same and the second output, and
• the energy storage device or the first energy storage element of the energy storage device is electrically connected to the switching device in the event of the portable part having been coupled.