These onboard chargers have the same housing and mounting dimensions as our traditional Charge Pro Guest chargers with a number of performance improvements. Flooded charging, microprocessor controlled AGM or gel batteries for precise charging. Universal 120/230V input for freedom to go anywhere. Sense-Send technology detects the power needs of each battery and sends the correct charge. The outputs can be put in series or parallel for higher voltage or current. Designed for harsh marine and industrial environments: moisture, salt, shock and vibration proof. Meets global industry standards including UL, CE, CSA, ABYC, California Efficiency Regulations (CEC)