Precharging DC link between battery and power connection

A system comprising:

• a direct current (DC) link configured to receive DC power from a first converter that converts alternating current (AC) power into the DC power;
• a bidirectional DC-DC converter electrically connected between the DC link and a DC power source, wherein:
• the bidirectional DC-DC converter is configured to convert the DC power from a first voltage to a second voltage, and
• the bidirectional DC-DC converter includes a plurality of switches;
• and
• a controller configured to control a switching parameter of the plurality of switches to charge the DC link to a threshold voltage from the DC power source before the first converter provides power to the DC power source,
• wherein the switching parameter is a switching frequency, and
• wherein controlling the switching parameter includes:
• initially setting the switching parameter to a first value, and
• in response to determining that a set of criteria has been met:
• adjusting the switching parameter to a second value that is less than the first value, while holding constant a phase shift between a first set of switches of the plurality of switches and a second set of switches of the plurality of switches.