I'm not sure why I thought this would work, but in case it was planned to do, thought I'd mention:
Had the rover with the generator in it. Hooked it up to Laurion charger. When I got the rover to maximum power, I expected the excess fuel would charge up Laurion. It did not. Might be cool if it did.
===
Really think that "take empty power cells" from the lost rover, should share time with taking full power cells from the rover. Otherwise it takes forever to "rank up" this specific event.
===
After getting the lost rover and heading back to laurion, died at laurion (lack of water). When respawned, I got a message about what I can still achieve at Santorini, and maybe visit Astrape. Issue is, I've not made it to Santorini yet, not even the dam.