Inverter with closed cooling channel

An inverter comprising:

• a housing surrounding an internal space of the inverter;
• at least two boards disposed in the internal space with power semiconductors disposed thereon;
• a bracket for fixing the inverter to a wall;
• a rear wall having an air intake port disposed in the rear wall for taking in ambient air;
• an air exhaust port;
• a cooling channel closed with respect to the internal space and fluidly connected to the air intake port and the air exhaust port;
• a first fan for generating an air flow in the cooling channel;
• at least two heat sinks through which the air flow flows and which are disposed in the cooling channel, wherein
• a heat sink is disposed on each of the at least two boards;
• and
• the heat sinks and the boards are each electrically insulated from one another.