Trojan Battery (trojanbatteryre.com) introduced a product enhancement to address sulfation issues with batteries that are cycled at a partial state of charge (PSOC)—a common RE system scenario. When batteries are not fully charged, sulfation—the buildup of sulfate crystals on the batteries’ lead plates—reduces the available surface area of the lead plates, which lowers capacity and increases internal resistance. Batteries that become sulfated need to be replaced more frequently. The company’s “Smart Carbon” additive, standard in its industrial and premium flooded batteries, is claimed to help decrease the rate of sulfation and improve charge acceptance. Trojan estimates a cycle life increase of up to 15% with its Smart Carbon batteries for systems that operate in PSOC.