Thermal Conversion allows you to take any energy system that supports smelting and convert into solid fuel, allowing you to move it into any other typical coal type generator.
Start out by crafting a Conversion Matrix and smelting it.
Place the resulting Thermal Cell into your mod powered furnace to double it into two cells.
Then you may use a single cell in a furnace to smelt a single item or in any solid fuel (coal) generator.
Once you pick up enough thermal cells, you may compress them using the same formation as with a chest or furnace.
This fuels for 8 items as you may expect and can be compressed once more for the full 64.
Using 2 of these 64X Thermal Packs, you may even turn a piece of netherack into lava. Just put them into a crafting table, and add a bucket to store it.
You lose some energy, (lava only smelts 100,) but for many applications it is well worth it.
From Botania, to Thermal Expansion, and now to Tinkers Construct. Thermal Conversion has it covered.
I hope you enjoy.