Vatrer 12V 300Ah lithium battery
This is the same link the Megawatt calculators use. It doesn't mean your coach needs this exact one.
Check the current price on Amazon.
Problem fixer
Something quit. Let's find out why.
Pick what's wrong and answer a few quick questions. Every step comes from the 2019 Bounder owner's manual or the part maker, and we stop when they stop.
Start here
What's going on?
Tap the one that sounds closest. You can start over any time.
That's the end of this path. If it's still acting up, the manual hub has your model's owner's manual and the appliance makers' support pages.