An electrical assembly comprising a first control system (CTRL1) adapted to control a power conversion system (2), a sensor system (8) adapted to detect conditions relating to the first control system (CTRL1), the conditions comprising temperature and/or humidity, and a heating system (5) adapted to heat the first control system (CTRL1) of the electrical assembly. The electrical assembly further comprises a second control system (CTRL2) which is adapted to receive information from the sensor system (8) and in connection with turning on the electrical assembly to selectively turn on the first control system (CTRL1) and/or the heating system (5) based on conditions relating to the first control system (CTRL1).