Redarc Bcdc1225D Solar Wiring Diagram. The bcdc 1225d needs to indicate an active solar. Web changes to the redarc bcdc1225d orange wire. Rob installs a Redarc BCDC1225 charger from www.campertrailers.org Web your newer unit indeed has that dedicated yellow solar input wire, so no extra relay needed there. Solar 12v redarc wiring jump start diagrams […]