If it is a portable charger looks about twice the size of a GZ 6k battery generator. To put in into perspective a GZ 6k is a ~6k Wh battery with an 120v inverter, weights ~100 lbs, and costs ~$6k USD. With it you could get ~10 miles range (@rated Wh/mi) in ~5-10 hours charging, and takes 2-4+ days to recharge under solar. That is with 800w (200w x4, ~65 ft^2 solar area). so another ~175 lbs and ~$2k in portable solar panels.
In theory, if this is double the size and 240. Dependent on inverter. Probably could give you 15-20 miles in 3-6 hours, weight >250 lbs, and cost >$15k. Solar jumping to 1kw (~90 ft^2, ~220 lbs, ~$2500) could charge it back in 3-6+days.
So big picture (with solar), ~$17k-20k, ~450-500 lbs, takes 3-6 hours to refuel, and 3-6+ days to refill, takes up most of the space in the bed, will give you the equivalent of #1-5 gallon jerry can of gas.