[SPOILERS] What sustains Simon?

[Void]

Greetings,

I wonder what sustains Simon, since he is only a corpse plus some head cyberware in a diving suit. The suits may be powered (the first one has luminescent spots all over it, the second is said to have strength-enhancing servos if I remember correctly), but they're meant to be worn by a living human, so their power reserve would probably be drained very quickly when also used to sustain the wearer himself.

The Structure Gel may have some powering properties (not mentioned in-game AFAIK) but I doubt it would have enough stored power for a walking, running, climbing, thinking, talking being of human size.

The WAU flowers (is that their official name?) could be replenishing Simon's power, but since you can complete the game with only connecting to one flower in Upsilon, this can't be the solution either.

I have completed the game once some days ago and I don't remember this being explained or questioned in-game. Did I miss something or is it left to the player to wonder?

Any information or hypothesis is welcome.