i saw some earlier chats on converters styles ...thought i throw in some history. the earlier rvs had convection style heaters and no 12 volts appliances , just 12 volt lighting and 110 volt lighting. the next stage added forced air furnaces with a transformer and diodes to run a 12 volt motor but no provision to supply that power to the rest of the coach. then the first converters came on the scene. they would run the lights and furnace but you had to switch between the converter or the battery for the power source to the load. then they came out with a converter that had a relay to switch the load for you but still no provision to charge the battery. then a fully a fully automatic converter came next but it only had a 10 amp circuit for charging. thats the story for the "linear style" converter. there is the "ferro resonant" converter that came along in the 70s i believe...famous for noise, heat, but convenient for only having 2 wires to hook up. the latest generation is the "switch mode" ...quiet, efficient, high output for charging and loads, no ac ripple. they actually boost battery life. to see if your converter charges your battery, just plug in the coach and hook your volt meter to the posts. anything over 12.8 volts dc is charging current. fully automatic chargers started in about 1975. ive seen the ferro resonant in earlier travco and airstream models. hope you enjoyed the read.