posted on Oct, 23 2013 @ 06:02 PM
reply to post by InTheLight
That is not free in so many ways.
First, you have to own that generator setup, and that's not free.
Second, for every 250W of power you produce, you have to consume additional food with considerably more potential energy because of the body's
inefficiency in converting food to mechanical motion.
Third, there is the opportunity cost. While you're pedaling the bike, you're not out making house calls fixing PC problems for $40 an hour or
whatever you do for a living, and you can buy a lot of electricity with that $40, probably more than you could generate with an entire week of
Fourth, have you ever actually tried to generate 250 watts that way? I have. It is really a lot harder than it looks, and most people would be
exhausted after a few minutes. You could always get a horse and the horse can generate 746 Watts (that's 1 horsepower by definition), but the horse
eats like a horse, and feeding it isn't free, not to mention the required investment in a super dooper pooper scooper to clean up your yard of the
mess, a task which probably isn't that much fun.
reply to post by cavedweller88
If you do a cost benefit analysis, you will discover that for the small amount of power that you need, it is most cost effective to buy the power from
What? No pitch for Rossi's eCat? Or have you given up on that by now? Sorry, I couldn't resist.
But joking aside, yes, I think that analysis is most probably the correct one, once the analysis is done correctly. For the other options you not only
have to amortize capital costs, but have to consider maintenance costs and other factors (like you could have invested the money instead, so you're
losing those investment profits).