That 450 miles will also use up the electricity stored in the 60kWh battery. So you'd get one day to travel 450 miles and then either have to plug in to charge

That 450 miles will also use up the electricity stored in the 60kWh battery. So you'd get one day to travel 450 miles and then either have to plug in to charge, or use the solar panels to regain range. They mention being able to gain a full charge in 2-3 days if stationary, which is impressive. Given the 60kWh battery they must be getting around 20kWh/day from the panels. It sounds like they are averaging around 60 miles/day on their road trip. Given the regular RV loads they will have for cooking and lighting, in addition to cloud days, it seems like they are fully utilizing their solar gain.