With limited sun hours for proper recharging of standard deep cycle batteries, the need for a Partial State of Charge (PSoC) technology is greatly needed. This advanced technology will allow for extended life of a battery in self-consumption applications. Nano-Carbon offers all the safety and convenience of a VRLA battery with the cycling benefits of advanced energy storage. The Nano-Carbon is an enhanced and optimized negative active material formulation which makes it more than just a carbon additive. The high surface area carbon is a specially formulated additive for improving the negative active material in lead-acid batteries. Carbon increases conductivity and adds additional capacitance to the battery. Nano-Carbon improves charge efficiency and allows PSoC operation with improved deep discharge recovery.