I built custom electric cars, and now I am sharing my knowledge for free in a knowledge base and in a YouTube series: https://foxev.io/batteries https://youtube.com/@foxev-content I hope this helps someone :) My knowledge is EV and renewable energy knowledge from first principles and for an open source tool. https://openinverter.org lets you re-purpose the drivetrain from any EV, like Toyota Prius or Tesla Model S and put it into another car. For this I offer paid support at $200/call and have about 2 of them per month. I am trying to turn this trickle of revenue into a more predictable stream, suggestions welcome. The videos are meant to give free help and at the same time serve as lead-gen.