Quoted:
Power your genset with a stationary or modified bike.
good luck with that plan.
an adult male can make about 60 to 80W (about 0.1HP) for about 1hr before fatiguing. even a small submersible well pump is 1/2HP, requiring about 500W to run. moreover, the conversion efficiency from human->generator->motor->pumping water is on the order of 70%, so around 30% of the power you produced on the bike is lost forever.
meanwhile, your human powered generator didn't come free. the tradeoff for converting calories to electrical power is not a good one. to produce that 1/10th of a horsepower for any meaningful period will require a lot of food intake. and during SHTF, i doubt that there will be a lot of "spare calories". so the weak link in this idea is the fact that to generate appreciable power, one has to consume large quantities of food. for example, it's not uncommon for Tour de France riders to be on 9000 calorie per day "diets" for the entire month.
in a SHTF situation, i value conserving food over having electrical power. i would not "waste" food by inefficiently converting it to electricity.
related,
link
Like many of these projects, the California Fitness setup isn't going to light up the Hong Kong skyline or even power the club's own air conditioning. The gym chain has rigged up 13 machines at one of its clubs here. When all of them are in use, the power generated amounts to about 300 watts, roughly enough to run three 27-inch television sets, five 60-watt light bulbs or several hundred video iPods.
ar-jedi