RedstoneFlux

Not yet.

We plan to add support for FE energy system in the future updates.

You can, in fact, make a simple Energy storage per block/item if you want although it will be hard to make cables that will work
You just need to use NBT tags and from my attempts of making working Forge Energy, All you need to do is to make Specific tags, usually, Most of the mods, if not all are using NBT tag with "Energy" as its name, to this allows FE to identify what tag is used to store energy and distribute it between mods however you can name it idk "Potatoes" and it will work too but if you want someone to be able to use your energy than you will have to tell that person to use NBT tag name "Potatoes" 

So as the conclusion, you can make simply energy right now but just to make it easier for everyone please use "Energy" as a name for your NBT tag that defines your energy, you can call your energy however you want but NBT needs to be named "Energy" so that also code for FE will be able to identify it

Note: there is more about that like maxReceive, maxDistribution or Capacity Tags but this is just to clean up and limit energy input/output and max amount of stored energy