A power conversion device includes an inverter configured to receive direct current (DC) power and convert the DC power to alternating current (AC) power, at least one capacitor having a first capacitance, and a busbar assembly electrically connected to the inverter and configured to electrically connect the inverter to a power source. The busbar assembly includes a positive busbar and a negative busbar, and a first capacitor layer disposed between the positive busbar and the negative busbar. The first capacitor layer is configured provide an amount of capacitance in addition to the first capacitance.