Doblo something is draining my battery

[bradbeth]

hi all something is draining the battery on my doblo van and in 18 months ive gone through two batteries and another fault on it is it struggles firing up aaswell the starter motor sounds fine because you can clearly hearit trying if anybody has any solutions i would be very gratful

 

[sludgeguts]

Depends on how fast the battery is drained...
Fully charge battery. Check output, pull a fuse, wait a few hours, hlaf day, day ? check output.
Repeat until you get a result where the output remains the same.