Can anyone confirm whether it is 'normal' that the water pump in our 2002 Ace Jubilee Globetrotter only works if the battery is fully charged?? Should we be able to switch it to mains only? If so how??!! Had a problem with the battery charger and only found out then - previously we thought it was on mains supply?! Not had this caravan long so still finding our way around it - neither of us are technically minded so don't fully understand the workings of caravans/hook ups/battery etc. Have looked at hand book but are no wiser! Never had any problems with 'old Abbey' caravan!