We have recently purchased a solar panel so we can do more off grid touring, it all worked well when we tried it at home but when we disconnected the panel and put the Van back onto the EHU at home the reading on the control panel was 14.6 were it,s usually 14.1, we have tried it without the battery connected and its still reading 14.6 , there isn,t any error display coming up on the panel to say its overcharged but surely this is too high.