We have a 2011 Damon Daybreak 3211 with an Onan 5.5 Generator fitted. Trying wild camping next week (boon docking to you guys I think) for the first time. Anyone have any idea how long we need to run the generator to keep the house battery charged? I suspect that all we will be running off the battery is the lighting and water pump. Thanks for any advice. By the way we are over here in the UK.