Hello .... The 6 volt deep cycle battery is mounted on the tongue of the trailer directly in front of the
propane tanks . The inverter converts the 110 shore power to 12 volt which charges the battery when shore power is in use ...... If the tow vehicle is properly wired the battery is charged when the trailer is plugged into the vehicle .... need to be careful to disconnect the trailer from the vehicle when
boondocking AND remember to set the switches located in the access panel(port side , forward) to the correct position( 12 volt or 110) ......... Enjoy !! Hope this helps ... jp