Battery Temperature Monitor

[Tom Bav]

Just had the wonderful experience of a battery fire while I was absent from the yacht - and thankfully, the local team jumped on it before it took hold.
Pretty sure it was a fault within one of my four 150ah AGM batteries that created the drama and have had it replaced under warranty.
Although I’m running a ‘smart charger’ Pro Nautic 12-40P, the unit uses a voltage variability measurement to determine if overheating is occurring - and switches itself off (presumably) - but doesn’t issue an alarm.
So that I can sleep easily at night, does anyone know of a temperature sensor system that can be applied to each battery with maybe a Bluetooth warning to a smart phone? I’d even be happy with a simple audible ‘over temp’ alarm...
I’ve spent hours trolling the net but can’t find something that sounds like a simple fix.

[rbk]

The remote panel for the P series has alarms. I’m sure one of them is overtemp. Curious as to what happened. The p series are very respectable charger and use the same on battery temp sensors as Balmar, sterling etc.