i was able to do it by installing the generator in the rover, going straight to santorini, installing the motor from the mining machine in santorini, using the energy cells you find there and loading up with as much water as i can (small water bottle + water pouch + water bottle full)
You can completely skip that if you go straight to Santorini from Talos and charge the rover there. The upgraded motor will help you get there faster but eats a lot more energy. The 3 energy cells you find at Santorini will be more than enough. You really only need 1 of them once you've unlocked the route.