Video by Tesla Trip via YouTube
Source
I made a quick tonneau like cover from 2 solar panels and EcoFlow Batteries. Can keep the portable batteries fully charge and even charge up the truck a bit.
You can too here are the links to what I used:
EcoFlow Batteries
https://amzn.to/3lvnmAR
240v Setup
https://amzn.to/3Z0FjGj
230W 24v Solar Panels
https://amzn.to/3Z0FjGj
https://www.autoblog.com/2022/04/25/hyundai-santa-cruz-worksport-tonneau-cover/
Aero x
https://www.mivehiclesolutions.com/aero-x-cap
Wild West EV
https://wildwestev.com/