By energy, do you mean their Capacitor?
Because for someone who claims (in their CSM campaign post, mind you): CSM, Naari Naarian - #17 by Naari_Naarian and also here: Reddit - Dive into anything
“almost all of my history in eve has been in nullsec Sov Space. I have fought in many great battles, and been in many great alliance, and have even bee in leadership in a few.”
" I have been playing since 2003 and have countless hours played on this game. I have FCed for many well known alliances such as BoB and other major alliances. I have won countless battles as well in my EVE career."
You should know that Capitals already drain ~75% of their capacitor (depending on skill) upon activating their Jump Drives. Here’s an EVE Uni article about it, in case in your tons of experience FCing major nullsec alliance fleets like BoB, you’ve forgotten that this already exists: Jump drives - EVE University Wiki
Unless of course, you’re talking about some other kind of “energy” that capitals have. 