I went to check the van yesterday ready to go away. The leisure battery had discharged and the charge indicator on the panel wasn't on. There is power at the hook up point. The trips had gone off so I reset them but the indicator is still not showing. I can charge the battery from the engine running but obviously need to be able to use hookups on site. Any suggestions as to what I may check without having to book into a dealers and miss our time away, please? Once the battery is topped up all of the panel functions work except for the charging.