Leisure battery discharging

Rexy55 replied on 25/02/2019 00:00

Posted on 25/02/2019 00:00

Hi

On our first trip away wild camping last week we noticed that we did'nt have as much battery power as expected.Couldn't understand why we didn't have a full battery when we parked up for the night,to the point that we only turned on one light the second night and no heating,blooming freezing!!!..

Solar panel seemed to be charging OK .

It wasn't until we drove home(120 miles) that we noticed that the battery voltage went from 12.2 to 11.2.I put it on charge as soon as we got home.I also put a multimeter on it with engine running and it didn't seem to be putting in any charge.

I've worked out that vehicle battery is discharging  rather than charging leisure battery but have no idea why?

Any help would be appreciated.

Regards

 

hitchglitch replied on 15/03/2019 08:25

Posted on 13/03/2019 21:37 by Rexy55

Hi

Thanks both for your replies.

Hitchglitch,I had turned off tank heaters as was wondering whether that was part of problem,but was waiting for a trip away to see if it helped..

Dave29,that sounds more like what I think is the problem but you have explained what might be causing it so thanks again for that.I will go away again and if it does the same I will have a better understanding of it when I go back to dealer.I take it that the leisure battery is not charged directly from the alternator but through the vehicle battery?Therefore the B2B charger that you mention is between the 2 batteries to stop the overcharging of the leisure battery much like the charger from the solar panel?

Not overly impressed with dealer,never seem to fix problems straight away!!!!...It took them 2 visits to sort a fault that was on the van when I took delivery and 3 visits to sort a faulty control panel that hopefully works now!!!...

Regards

Posted on 15/03/2019 08:25

It’s quite likely that the tank heater set-up differs on different makes of motorhome but I was surprised that Autosleepers allowed the heaters to stay on when not connected to EHU. They are such a big drain on the battery that it’s difficult to see how they could practically be used for any length of time when not hooked up to mains.

TonyIshUK replied on 20/03/2019 19:05

Posted on 20/03/2019 19:05

It maybe worth raising this problem on my he MMM Motorhome forum.

There are a couple of members, one has good knowledge of the specialised charging units using mhomes. Complete with horror stories because the innards have fried, due to cheap design. Other has good knowledge of Fiat  / Peugeot electrics and canbus systems.

The units prioritise the battery / fridge requirements and alter charging according,  There is a possibility there is a fault in the charger unit misreading the battery's requirements.

Gone are the days when a split charger just pushed some volts when the alternator had finished duties with windscreen wipers, heater fans , radio etc.

Or something simple like leaving the sat nav in sleep mode, but connected, likewise a dash cam if you have one.

Rgds

 

Rexy55 replied on 31/03/2019 12:18

Posted on 31/03/2019 12:18

Hi

Thanks TonyIshUK.

We have just come back from week in Wales using the van as requested by dealer, we did manage a couple of nights off EHU but mainly stayed on sites.

The leisure battery still discharged when on the road,doesn't matter whether its 20 miles or 200,whether the voltage starts at 12.4 or 14.4 seems to lose about 1.5v.

Regards

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