Bongo Fury

Hi All I'm mid way through my Europe trip currently and until December, and I have a concern with my leisure battery.

Currently I get some BIG difference between how long my fridge(Waeco Cdf-11 - 2.5amps) lasts when the van is not moving (With out hookup). I've had it working for 30hours without charge in 28C heat (about 60 days ago) and two days ago I had it working for only 3 hours before it konked out for lack of power, in similar heat (Both at 4C) and this was at the end a day after 8 hour drive. Strange? Or does it need a longer charge from dead?

I had the battery test 2 weeks ago (2 X Hatchi 85amps - I think Jap spec) and both where fine. And I have a zig CF9 split relay charger (It also does hookup).

Anyone have any ideas?

So this is strange (For me anyway, I might learn something)

Bongo has not moved for 1hour and I put a multimeter across all batteries
Starter is 12.6v then after 2 minutes (Of doing nothing) it rose to 14.5v
Leisure battery did the same
Bear in mind the bongo was not running, no electricity plugged in. How am I getting 14.5v??
Residue charge after an hour???

So I then turn it on and I am getting 14.3v from the alternator and similar results on the batteries.

It sounds to me like you'll need Geoff (G8HDE) to remedy this one... On the whole it sounds like something is powering up intermittently causing battery reading fluctuations... I bet it's fridge related somehow.

Hmmm I would agree but the fridge was unplugged At the time

I can't see how a battery with no engine runnning or other electrical input can be outputting over 14 volts after an hour of doing nothing, are you sure the meter is not a bit iffy? Worth checking it with a different meter? Have you got solar panels fitted? or maybe a wind turbine?