If you have an ET then thats some kind of generator.
On a competitor's forum site (ramforum.com) there's a thread from 7-20-2021 that may apply to your situation. Otherwise that's about all I know. Here's a reply:
"Thought I'd share my recent troubles, if only to vent.
I have 42,000 miles on my Longhorn with eTorque. A couple weeks ago, I started getting the voltage trouble light with readings as low as 11.2V while driving. Hoping that it was just the battery and not a more expensive problem, I went ahead and put a new one in it. That apparently fixed the problem and I was back up to 14+V.
I took off on a trip to the Texas coast last Friday, a drive of about 2.5 hours, and started to get voltage trouble again. I located a dealership about 30 miles away, back the way I'd come, and almost made it. Lost power about 5 miles out. Long story short, I received a call from the service dept yesterday and they said it needs a new alternator (or is it a generator?). With labor, that is going to set me back about $1700 since I've exceeded the 35K warranty.
If that's not enough of a kick in the ****, the ETA on the new alternator is August 3 - about 2 weeks. Luckily, they provided me a loaner vehicle, a Jeep Renegade, to allow me to get around but I'm hamstrung without a truck to haul feed, etc...
I asked about an aftermarket alt/gen for a lower price, and was told that there's not any reliable ones at this time..."
