Time really depends on your other used mods. Using Buildcraft and building a filler-based cobblegen powered by Transformers electric engine... a decent lava lake is all you need to get enough energy, geogens are cheap, so i estimate about 5-6 hours? Could be way off though, got no experience in this regard, I tend to take my time playing
I've got to agree with Magus though. Doing a contest on this seems very silly. But congrats on first place on the leaderboard, though
Hint hint, craft the boots, boostjumps are fun
Also: I'm one of these idiots who wear the solar helmet. Not because of the energy, just for the lulz. Quantum helmet as standard headwear is very annoying to me, because I can't eat anything wearing this. Replenishing food via Qhelm costs quite an amount of energy (which isn't an issue), and reloading the helm is annoying. Carrying a stack of something to eat (with high saturation) is far less hassle. So, solar helm, because I can Gives me a reason to build automated farms, ranches and slaughterhouses.
(Hmm, 60 spm (steaks per minute) seems a bit overengineered...)
I seem to remember that the Qhelm once replenished the food bar just up to 9... meat thingies. Don't know why it doesn't anymore...