Rather than using a battery, I would like to feed the generated power back into my wall socket and have an amp-meter read-out attached inline for psychological satisfaction. It seems to me that this would save on parts and maybe even be more efficient.
But I'm no EE. I assume it's possible to do - but what would it take to convert the energy appropriately/safely? How much energy would be wasted in the conversion to 120v ac over other applications? I also assume that any modern household circuit could safely handle the additional supply from pedal power.