Problem with Lithium fitters

[Wh05apk]

We were on a campsite and an Autotrail arrived that had just had lithium fitted by Roadpro and they had a smell of burning plastic, so they rang Roadpro and told to bring in back first thing Monday morning, they had it fixed and returned to campsite but the next day they had to go back to Roadpro again , same burning smell

So what was the burning smell?

 

[Manic]

They weren’t very clear but was something to do with the control side of charging I think.

 

[Ingwe]

They weren’t very clear but was something to do with the control side of charging I think.

Hope all’s ok.