Progressive Dynamic PD9140AV RV Inteli-Power 9100 Converter/Charger 40 Amp Power Converter; Inteli-Power (R) 9100 Series; Converts 105 To 130 Volt AC To 13.6 Volt DC; 600 Continuous Watts; 40 Amps Maximum Output; 80 Percent Efficiency; With Reverse Battery/ Thermal Protection; 8.62 Inch Length x 7-1/4 Inch Width x 4-1/2 Inch Height; With Built-In Total Charge Management System Interface Reverse Battery Protection Protects Converters From Damage Resulting From Improper (Reverse) Battery Lead Connection. Solid-State Converter/Chargers Deliver Filtered DC Power To All 12 Volt Lighting And Appliance Circuits Providing Safe And Reliable Service Electronic Current Limiting Automatically Reduces Output Voltage When Maximum Capacity Is Reached. Low Line Voltage Protection Automatically Shuts Converter Down If Input Voltage Is Insufficient And Protects Appliances From Damaging Low Voltage Irregularities Variable Speed Intelligent Cooling Fan Automatically Monitors Converter Temperature And Activates Fan At Speed Required. High Voltage Protection Protects Converter From Spikes Or Surge Of Voltage Over 135 Volt Automatic Thermal Protection Reduces Converter Output To Safe Levels When Unit Temperature Exceeds Pre-Set Limits And Protects Converter From Damage Due To Excessive Heat