I have been robbed blind while boondocking for the past three years. It has cost me thousands and untold energy to replace what I lost*. This thief is silent, relentless and resides in about half of the RVs built in this country! What is it? It is a heat strip contained in the majority of Dometic RV refrigerators. It is intended to reduce the formation of condensation and wetness of the door seal, however, the resistive heat strip draws 1 amp (12 watts) of power from your precious battery bank when the refrigerator is turned on. That equates to 24 amps per day or about 1/4 the reserve of most deep cycle RV batteries. That's ginormous ! To give you an idea on how huge this is, 24 amps would run your furnace nonstop for approximately 4 hours (a night’s worth of heat), a LED light bulb for 10 days and would run your water pump for a week's worth of showers! In addition, it takes the average RV converter/charger 8 hours to replace those amps. So how do you know if this thief resides in your refrigerator? Open the exterior vent to your refrigerator located on the outside of your RV. There you will see a schematic like the one shown. If you see a little squiggly emblem which designates resistance, you have this parasitic thief and must exorcise it as 12 volt resistance is the nemesis of freedom-loving boondockers everywhere.