Abstract: A system and method to increase solar system efficiency via a novel symmetric direct current regulation (SDCR) system to maximize useable solar power and optimize storage of energy in battery pack systems. The SDCR system maximizes delivery of generated solar power to the battery storage, utility grid or local building loads. The SDCR system comprises a plurality of photovoltaic arrays whose output voltage is mapped to the operational voltage of a LiFePO4 battery storage system and a grid-tied inverter. Efficiency is increased by approximately 30% via (a) the elimination of in-line charge controllers for stepping down power from the PV array to the battery pack, and (b) the elimination of boost controllers for stepping up power to the requirements of the inverter. Thus, the SDCR system is able to support low-loss symmetric delivery of electrical power to both the battery storage pack and the inverter.