I’ve been weighing similar choices between EV vans and traditional gas-powered ones. The loss of alternator charging is definitely something to consider, especially if you’re used to the convenience of engine-driven power for batteries. Your plan to add 1650 watts of solar is a smart move—it can extend your range modestly, though as you noted, weather plays a big role in daily solar gain. Charging at home or while parked long-term, like at your mom’s, is an advantage many EV owners rely on to keep things practical. Warranty questions on directing solar into the van’s battery can be tricky; often it depends on the vehicle’s electrical system design and what modifications are allowed without voiding coverage.