Sun-Farming facility

Sun-Farming facilities are presumably used to generate power from solar energy, though we guess it's possible the Autobots are actually growing suns. Either way, they produce Energon which inevitably attracts the attention of Decepticons.

Games

Transformers Legends

Sideswipe was in charge of a Sun-Farming facility. When it came under attack from Thunderwing's forces, the Autobots tried in vain to defend it, and were eventually forced to retreat and leave the base in Decepticon hands. Revelation