| CPC H05K 7/14324 (2022.08) [H02M 7/003 (2013.01); H05K 7/14322 (2022.08)] | 10 Claims |

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1. The inverter device, comprising a main body housing in which an optional module is detachably installed and a first circuit module is disposed inside, wherein the inverter device, comprises:
an optional module installation portion provided on a front surface of the main body housing to install the optional module;
an opening portion formed in the optional module installation portion; and
a connection member insertion portion disposed in the opening portion to connect a connection member provided in the optional module, and
wherein the optional module installation portion comprises:
at least one optional module fastening hole formed in the main body housing; and
at least one optional module fastening groove spaced apart from the optional module fastening hole, and
wherein the optional module comprises:
an optional module housing at least one first protrusion portion coupled to the optional module fastening hole; and
at least one second protrusion portion coupled to the optional module fastening groove having a second circuit module;
wherein the connection member is capable of being coupled to the connection member insertion portion to allow the second circuit module to be electrically connected to the first circuit module; and
wherein the connection member comprises:
a connector inserted into the connection member insertion portion; and
a cable formed of a flexible member to electrically connect the connector and the second circuit module.
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