An apparatus (100, 200, 300), comprising: a control module (201, 301, 401, 500) comprising a communication interface (105, 302, 303, 304, 402, 503) configured to transmit and receive data to/from at least one external device and at least one bus slot configured to receive a power output module (105, 202, 203, 204, 215, 216, 217, 218, 302, 303, 304, 402, 503); at least one power output module (105, 202, 203, 204, 215, 216, 217, 218, 302, 303, 304, 402, 503) removably attachable to at least one of the control module (201, 301, 401, 500) and one or more power output modules (105, 202, 203, 204, 215, 216, 217, 218, 302, 303, 304, 402, 503) with a bus connection; and at least one bus configured to provide a data connection between the control module (201, 301, 401, 500) and the at least one power output module (105, 202, 203, 204, 215, 216, 217, 218, 302, 303, 304, 402, 503); wherein the at least one power output module (105, 202, 203, 204, 215, 216, 217, 218, 302, 303, 304, 402, 503) is configured to dispatch monitoring data to the control module (201, 301, 401, 500) via the bus connection, the monitoring data comprising a power output module specific identifier and energy consumption data associated to a power output of the power output module (105, 202, 203, 204, 215, 216, 217, 218, 302, 303, 304, 402, 503);, characterized by the control module (201, 301, 401, 500) is configured to individually control each power output module (105, 202, 203, 204, 215, 216, 217, 218, 302, 303, 304, 402, 503) based on the monitoring data and data received from the at least one external device; the at least one power output module (105, 202, 203, 204, 215, 216, 217, 218, 302, 303, 304, 402, 503) comprises at least one of a bus connector or a bus slot configured to removably attach the power output module (105, 202, 203, 204, 215, 216, 217, 218, 302, 303, 304, 402, 503) to at least one of the control module (201, 301, 401, 500) or one or more power output modules (105, 202, 203, 204, 215, 216, 217, 218, 302, 303, 304, 402, 503); and wherein the bus connector or bus slot is configured to connect the modules so that the control module (201, 301, 401, 500) is configured to individually control each power output module. a control module (201, 301, 401, 500) comprising a communication interface (105, 302, 303, 304, 402, 503) configured to transmit and receive data to/from at least one external device and at least one bus slot configured to receive a power output module (105, 202, 203, 204, 215, 216, 217, 218, 302, 303, 304, 402, 503); at least one power output module (105, 202, 203, 204, 215, 216, 217, 218, 302, 303, 304, 402, 503) removably attachable to at least one of the control module (201, 301, 401, 500) and one or more power output modules (105, 202, 203, 204, 215, 216, 217, 218, 302, 303, 304, 402, 503) with a bus connection; and at least one bus configured to provide a data connection between the control module (201, 301, 401, 500) and the at least one power output module (105, 202, 203, 204, 215, 216, 217, 218, 302, 303, 304, 402, 503); wherein the at least one power output module (105, 202, 203, 204, 215, 216, 217, 218, 302, 303, 304, 402, 503) is configured to dispatch monitoring data to the control module (201, 301, 401, 500) via the bus connection, the monitoring data comprising a power output module specific identifier and energy consumption data associated to a power output of the power output module (105, 202, 203, 204, 215, 216, 217, 218, 302, 303, 304, 402, 503);, characterized by the control module (201, 301, 401, 500) is configured to individually control each power output module (105, 202, 203, 204, 215, 216, 217, 218, 302, 303, 304, 402, 503) based on the monitoring data and data received from the at least one external device; the at least one power output module (105, 202, 203, 204, 215, 216, 217, 218, 302, 303, 304, 402, 503) comprises at least one of a bus connector or a bus slot configured to removably attach the power output module (105, 202, 203, 204, 215, 216, 217, 218, 302, 303, 304, 402, 503) to at least one of the control module (201, 301, 401, 500) or one or more power output modules (105, 202, 203, 204, 215, 216, 217, 218, 302, 303, 304, 402, 503); and wherein the bus connector or bus slot is configured to connect the modules so that the control module (201, 301, 401, 500) is configured to individually control each power output module.