Explanation of Inverter DC Capacitance and Inrush Current

What is Inverter DC Capacitance? All modern power inverters have a large capacitor bank at their DC input terminals to help provide smooth power conversion from DC to an AC sine wave and back to DC when charging the battery. The amount of DC capacitance is typically proportional to the inverter’s surge rating, which is typically proportional to the inverter’s size and cost. We say “typically” because specific inverter models also vary in other related specs, such as inductance and operating frequency, which are all related along with capacitance to the inverter’s cost, size, and surge performance. The amount of inductance and capacitance, among other things, is what separates an 80lb $1500 inverter (Victron, Magnum) from a 20lb $1000 inverter (Xantrex, Kisae).

See attached PDF document for more detailed explanation.