So had a flat battery , rac came out said it was a dud and advised me to take to fiat - they said there was nothing wrong and charged me £75 quid for the privilege . Then took it to a recommenced marine and caravan heating and electronics specialist that was recommended and after 5 hours he couldn’t find anything wrong but I had a battery master fitted . So that the EHU will trickle charge the lot - another £350 spent . Drive the truck home - some 20 miles , switched off and checked the battery via the control panel and it says 1 bar - out of 10 ! Do the control panels often misreport the starter battery charge ? Or have I miss understood something . Btw truck was at the specialists for over a week and started fine - and he didn’t apply a charge