A customizable power conversion system (1000) is configured to operate with multiple alternating current (AC) and direct current (DC) power sources (1001,1003) and supplies multiple AC and DC loads (1018,1020,1022,1024). The customizable power conversion system is also configured to be assembled from a plurality of customizable power converters (1004,1006,1008,1010,1012), each of which is configured to function as a building block of the customizable power conversion system. More particularly, each customizable power converter may be configured as any DC/DC, DC/AC, AC/DC, or AC/AC converter, such as any of i) an inverter, ii) a DC/DC converter for use with a photovoltaic (PV) array (or string of PV arrays), and iii) a DC/DC converter for use with an energy storage element (e.g., a battery or battery string).