Solaris

Produce more than 10 GJ per hour from solar panels - i.e. a large solar field actually under load (panels only count while they're generating and something's drawing the power, and they make nothing at night, so build generously). Just keep expanding your solar array as you scale up; it'll tick over naturally on a solar-heavy base. Mutually exclusive with Steam all the way on the same save - that one bans solar panels entirely.