Feeling Hot Hot Hot!!!

[MikeManning]

Help if anybody can.
We have a Bavaria I740c Allure which is basically a Pilote i740c. Coming home from a weekend away we started to experience a very unpleasant smell whilst driving. The smell 'seemed' to get progressively stronger.
I thought that it might be coming from the grey water tank but standing by the table seat the smell seemed stronger. I lifted the cushions and the seat base to find that one of the batteries was REALLY hot and smelling pretty bad. I removed the cover from that battery and immediately disconnected the cables.

I was worried that the battery was going to explode, as it was almost too hot to touch, so I took it out of Bella (sorry, my wife's name for our MH).
I put a meter across the terminals and got a reading of 10.1 volts.

I put a meter onto the two leads that I had removed from the battery and got a reading of 13-14 volts.

Obviously the battery is obviously knackered but I've no idea why of how. Bella is a 2016 model.

Any ideas would be more than appreciated.

 

[David and Sally]

Seems like a cooked battery. Question is, is the charging regime to blame or is it just battery age?

How are the acid levels under those caps?

PS. That heating duct looks to have parted company?

 

[Raul]

Two possible causes:
-overcharging, check all charging sources that the settings are adequate and the measured output is in line with the settings.
-battery fault, possible but unlikely.
My money is on charging profile to aggressive and boiled the electrolyte away. When plates are exposed, they heat up fast.

 

[138go]

That happened to our Pilote. The solar panel was producing too much power, which cooked the controller.

 

[autorouter]

Since it showed up when you were driving, might be worth looking at the supply from the alternator. Possibly the regulator has failed. Worth checking with a meter with engine running. I don't know how old your MH is, does it have a B2B or a split charge relay? On the other hand, if it's only one battery out of two, it looks like a battery failure.