Best form of energy gen?

with soulshard cheating mod...just install nei and spawn debug item, it infinite battery.

Yep, you should spawn the debug item, since you're using OP methods of energy generation anyway.

How much energy will you neede and will you continue (auto)mining? If you continue mining you'll get more than enough energy from the extra nuclear fuel you dig up. Unless you need to feed several matterfabs at a time that 1k fuel should be close enough to reneweable.

Havign a free infinite and renewable source of coal is not "legit" by the definition of many, many people

Canning it won't help much. It'll likely just waste more time and energy than it's worth.

Quote from Th3RadMan

im just going to use coal because i want to stay legit and should i put the coal into fuel cans or is that less efficient?

It is as legit as using the debug item, except that it is producing massive amounts of lag.

just spawn debug item, you can't have real fun (dwarf fortress reference) with cheating mods like soul shards

I use these energy sources:
1) small coal boilers
2) manually farmed leaves -> Forestry ethanol -> Forestry bio gen
3) solars (I use GT solar panels)
Also, this can be occasionally supplemented with thermal/semifluid gens.
Are these methods OP?

Yes, but I did manage to generate 32 EU/t using solars on my last world.

Quote from Th3RadMan

well then again, how much eu do ultimate hybrid solars produce? i know hv ones make a ton

Edit: so it looks like they produce the same amount of eu/t, but which is cheaper and or better?

Depends on what you think is cheaper. HV solars require tons of base materials (e.g. copper, tin, rubber) but Ultimate Hybrid Solars require small amounts of expensive materials (e.g. iridium).

The UHS is also a "lunar panel", it can generate energy at night, but only 64 EU/t I think.

However, both are OP anyways and most people here won't consider them legit power generation.