@Sevio Hmmm, I was thinking that the 53.76 J would also apply to the closed system for its hydrogen pump, but now that I'm thinking more deeply about it, the oxygen pump has to make up for hydrogen pump not running all the time, due to the difference in gas proportions.  So, you're right!   And yes, there is!  Its called a packet combiner:     This is from my old Thermal Update base.  I used this quite a bit there to save as much power as I could.  That includ