Nope, IC2 Biomass to Biogas. And I'm powering multiple EV machines with it. Lots of them in fact I keep my methane from processing Rubber tree logs into carbon though in case my biogas production messes up somehow (or I have a 3 story tall explosion crater in the side of my base) and I need some fuel temporarily to get back running again.Methane?
Also, along the something for free line of thinking I've turned a cursed earth spawner into metal triplication for just about every type of metal in use prior to aluminum. I've made countless gold, antimony, and battery allow ingots from the metallum essential generated by my cursed earth spawner and iron golem farm. Plus now with AE2, it's all automated so anytime I'm running low on antimony, gold, nether quartz (made out of thin air from cobble->sand->glass, water, and basically free charcoal that I have 9000 stacks of), etc the system will just make more.