Intelli-Power 9200 Series Converters with BUILT-IN Charge Wizard will recharge your RV's battery to 90 percent in 2-3 hours. Many converters only have one charging mode, 13.6 volts, which can result in battery boil-off. The 9200 Series Converters have four charging modes: Boost Mode - (14.4 volts) Rapidly brings RV battery up to 90 percent of full charge. Normal Mode - (13.6 volts) Safely completes the charge or maintains the charge. Storage Mode - (13.2 volts) Maintains charge with minimal gassing or water loss during periods of non-use or storage. Desulfation Mode - ( 13.2 volts) With a 15 minute 14.4 volt burst every 21 hours. 80 Amps. Input 105-130 vac. Output 13.6 VDC. Weight 7.5 lbs.Dimensions in inches: 3.6 H x 11.5 L x 9 W