I replaced the batteries on my 2017 ACE 30.1 with a pair of 6V Interstate batteries. 225 Amp-Hours which greatly exceeded the 160 Amp-Hour rating of the OEM 12V Harris batteries that lasted less than 6 months.
They’ve been great for the 2+ years we’ve had them. These are available directly from Interstate. The Interstate 6V batteries that Costco carries don’t have as much capacity (nor the price tag).
However I’m thinking of moving to 4 AGM batteries, once I figure out how to install them. There is space on the battery tray if I remove the plates that Thor put there to fit a pair of 12V. Also I’m not sure of the weight that the Thor battery compartment will take.
https://www.interstatebatteries.com/...ategoryid=true