You can't generate a meaningful amount of electricity with a bicycle, and it won't save any money, either, because bike power generates such a tiny amount of electricity versus the cost of the setup. And it might not even be green energy, once you consider the energy that's used to produce your fuel (food).
A typical bike generator can produce 100 watts. If you pedal for an hour a day, 30 days a month, that's (30 x 100=) 3000 watt-hours, or 3 kWh. That's less than 1% of what a typical family uses in a month (920 kWH). You generated 0.3% of your energy, and continue to get 99.7% from the grid. Good job.
