Digital Duo Charge - 12/24VThe Digital Duo Charge (DDC-12/24) provides a "hands off" solution for charging two battery banks without the use of problematic isolators or manual battery switches. During charging the DDC-12/24 monitors voltage at the house battery. When voltage exceeds the set minimum (typically 13.2V in a 12V system and 26.4V in a 24V system) the DDC-12/24 automatically engages, providing up to 30A charge current to the starting battery. When no charge source is present, the DDC-12/24 separates the batteries so the starting battery won't be accidentally discharged into the house battery. An optional solenoid control enables higher start battery charging output when required.Features: Multi Bank Charging; The DDC is a Solid-State Battery Combiner; Control Voltage and Current between House and Start Batteries; Eliminates the Need for an Isolator, Relay or Manually Operated Battery Switch; Used in Concert with Max Charge or ARS-5 Regulators; Can also be Employed without a Balmar Regulator; Works in Both 12V and 24V Applications; House and Start Batteries can be different technologies; Start Battery Temperature Sensing Available with the MC-TS-B Sensor Cable; 4 Battery Programs Supported for the Start Battery:; Standard Flooded, Deep Cycle Flooded, AGM and Gel Cell; This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns. - cis2:mm5mnJlm -Owner's Manual (pdf)