One problem related to alternator/generator/regulator has been reported for the 2018 Jeep Wrangler. The most recently reported issues are listed below.
Vehicle stalled in highway, stop and go traffic for no reason and was extremely hard to restart. A few days later, the radio and backup camera went out and came back an hour or so later. The radio, which controls all electronics and backup camera, went out again. Dealer replaced some sort of interface for the infotainment system (radio) on 07/30/18. Then vehicle stalled again in highway, stop and go traffic on 08/03/2018 and was difficult to restart. Then, on 08/09/2018, a battery charge warning came on and they replaced the alternator. What is even more troubling, is these very problems are all over the internet. All work has been covered under warrantee but I have wasted the better part of two full days driving to/from the dealer or waiting in the waiting room. I have filed a complaint with fca (Jeep). It appears as though the electrical system Jeep engineers have designed for these Wrangler rubicon jls is flawed to say the least.