Gabriel DeVault has built and flown two of his own electric aircraft and assisted in another dozen or so electric aircraft efforts. A founding team member of Zero Motorcycles, he was head of R&D for about five years and used a Zero motor, battery package, controller and engine monitor in his Electric Xenos. He also designed the electric powerplant for the Aerolite EV-103 ultralight.
It’s worth remembering that it’s not just Van’s we’re talking about, but a whole constellation of supporting companies that make good money from RV builders.