So, here's a thought.
You can plug an electric vehicle into a standard 120V outlet, and it will take a very long time to charge, but it will work in a pinch if you don't have access to a charger. The best home charging times come from the 240V chargers that have to be installed in a garage or a driveway. And obviously with Tesla's, charging at a Supercharger is even quicker.
Now, presumably this truck will be used to pull RV trailers to campgrounds. Now, pretty much any campground will have 240V, 50Amp plugs available for those large trailers that have a lot of amperage draw from AC units, TV's, and other electronics.
Would it make sense to build that fast charger right into the truck, so that you can just plug into these 240V outlets that are at campgrounds without any extra hardware? It would actually make this electric truck useful for the camping crowd (you know, those people who buy a lot of trucks for towing).