So, poking through an old memory card briefly this evening, found this old image of my 2nd attempt at a Burning Man e-bike. I took 4x12v SLA batteries, welded steel square tube rear panniers. Good thing the bike frame was steel. Twisted the whole damn bike every time I went over a bump, and there were definitely a fair amount of small ruts and bumps out there! I think it was ~110lbs or so, maybe more. Enjoy!
