An upper limit is set for the electrical power drawn from the electrical power source.

The optical-to-electric power converter converts the optical power beam to electrical form, thus providing electrical power to a device.

A positive, respectively negative, sum of the two powers exchanged then corresponds to a conversion of electrical power into mechanical power, respectively of mechanical power into electrical power.

The charging portion includes an electrical power acceptor configured to accept electrical power from outside.

The supplementary linear D.C. electric motor converts the generating electrical power into magnetic field power (pushing force) in accordance to operation of electric relay/contactor.

The electrical output of the transformers is as mentioned above.

specific electric power of electric equipment

The electric power distribution system includes a first device (6) exchanging first electric power with the electric power source.

An electric power base (1), an electric power gateway (2), and an electric power gateway body (21).

electric power requirement at minimum heat output (elmin) means the electric power consumption of the solid fuel local space heater while providing the minimum heat output.

An electric power amount acquisition unit (144) acquires an electric power amount supplied from the electric power supply source to a secondary battery.