I was trying to stay within the non-electric aspect of this. Solar isn’t exactly something you can make yourself. Methane however is vaguely doable given a bit of effort and skilling up.
You can very easily do a solar installation yourself. But even more interestingly, even biomass-derived methane is more efficiently burned in a CCGT plant (>60% efficiency) to generate electricity for charging an e-bike than in an ICE engine on a moped (~20-25%?). And even better, a smart charger can charge an electric vehicle from an electric mix (NG/wind/solar/nuclear) optimally, so you can run from whatever is best at that moment.
