as im new to caravaning bear with me i bought a 1993 abi jubilee viceroy last october and it was on a seasonal site which i have now taken off to tour with the van as it was on a mains site there was no battery when i bought it ive put on a 110 amp battery and connected it through the wires supplied i was just concerned as to how it is charged is it charged when connected to a mains supply ie does it have a onboard charging system ?