question why are there no energy upgrades ? i can see speed upgrades but i cannont see energy upgrades

The reason is, well, because there are none! In the old version of the mod for 1.7.10, I went down the Mek route and added them myself... the problem was that I just thought they were incredibly easy to abuse. Filling a machine with energy upgrades and no speed upgrades could reduce the power cost to stupidly small levels.

I suppose you are wondering why there is a second upgrade slot in machines... if so, then yes, you would be right to wonder where the upgrades for those are - the answer is that they just haven't been added in yet. All I am sure of so far is that I want each machine to have a second, unique upgrade :)