I made a geothermal generator today and I searched a lot on how to use it. I put a lava packed in the Botton slot and I tried the fluid cell filled with lava. But it really does not work. Also, I found that the energy in Mekanism cannot be used for the machines in FTB industrials.

1. Use fluid pipes to transfer lava from a tank into the generators, the slots are for charging batteries
2. IC2 has had it's own power model for a long time, and that has been carried over to this version, there is no current way to use RF or FE power for FTB IC machines