G-
Honestly I have no idea. I put the thermal probe on the ones right next to them and other side, nothing out of ordinary.
That shrink wrap in the high-temp stuff and you are correct it melted, not just it but a couple banks directly next to it.
This being the 1st large bank was a test unit, so I did abuse it on purpose, meaning put it through tests such as charging with full solar setup and making coffee with it :-). Several rests in between.
I will be doing a complete dissection to hopefully find the problem.
I'm thinking that it was not a thermal run away, but a single Sub-C that failed, the hissing leads me to this.
No car!, at least not until Mother-E-News finishes MAXX and I can find ALL the parts for free. Plus she likes the scooter :-> BUT The Harley riders like her on it too ;-/
Cheers
Bruce S