Vehicle power module assembly

An assembly comprising:

• a first power module including a first housing having a first upper portion defining a first cavity that encloses a first electrical component, the first housing including two first minor side walls and two first major sidewalls that each have a first outer surface, the first outer surfaces form a first continuous perimeter of the first housing, wherein the two first minor side walls and the two first major sidewalls each include a first lower portion including a first extension wall that extends from a first one side of the first housing and extends the first outer surfaces to the first extension walls, the first extension walls define a first receptacle cavity having a first inner surface on an opposite side of the first extension walls from the first outer surfaces, wherein the first inner surface of the first extension walls define a first groove, wherein the first upper portion of the first housing includes a first recessed outer wall that is provided with a first rib;
• and
• a second power module including a second housing having a second upper portion defining a second cavity that encloses a second electrical component, the second housing including two second minor side walls and two second major sidewalls that each have a second outer surface, the second outer surfaces form a second continuous perimeter of the second housing, wherein the two second minor side walls and the two second major sidewalls each include a second lower portion including a second extension wall that extends from one side of the second housing and extends the second outer surfaces to the second extension walls, the second extension walls define a second receptacle cavity having a second inner surface on the opposite side of the second extension walls from the second outer surfaces, wherein the second inner surface of the second extension walls define a second groove, wherein the second upper portion of the second housing includes a second recessed outer wall provided with a second rib that is received in the first receptacle cavity and locked to the first groove of the first power module.