A few weeks ago I toyed with the idea of building an EV Jeep and went down the rabbit hole. Conclusion - not yet feasible unless you are able to salvage, design, and or build a cutting edge 400V to 800V system using a platform other than a LJ. I figure the efficiency for a Jeep is only about 500 WH/M so to reliably travel 150 miles you want about 619 Ah capacity. The best us mortals will do off the shelf is around 160V 28,800 wh for an actual 80% range of 46 miles. That's without regen but it doesn't matter because those battery modules would weigh over 600 lbs.