Shortly after the Cybertruck's reveal, Elon Musk tweeted about an option to add 15 miles per day through solar panels, with the possibility of double that number with add on "wings."
But is that number really possible? As it turns out ... yep. Absolutely. Even if you use some pretty conservative numbers about the efficiency of the panels and the whr / mile of the Cybertruck.
Here's a pretty spiffy video from YouTube that goes through the math, but basically, if the Cybertruck is 60% as efficient as the Model 3, the numbers are almost dead on.