Yes charger ( external one ) properly connected to the correct terminals, Lights worked at first then went dead. I knew I had no power because my fridge was reading lo dc.I did have the air on and then that stopped and so did everything else so because of lo dc reading I figured battery not charged also my test panel says no battery. Could the air conditioner have blown something that would affect the battery not charging? Very frustrating for me! Yes the switch for the house is in the correct position The lights work when plugged into external outlet did not try using the 12V when all this started