Hi, My name is Rae. Have been caravanning 12 years with my wife Karen.( she tells me the only time i'm happy is when i'm in the van...true. I have a 2008 Fleetwood Heritage with a factoy fitted solar panel to trickle charge the battery, The alarm wasn'nt on whilst stored and i had not used the van for a couple of months but the battery was flat. The battery is less than a year old. Question is, do these solar panels really work or are they just a gimmick.. Would appreciate some feedback if anyone has had similar experience...Rae