Some were commenting on a previous post as to how long it would take for energy farming to become a reality.
The short answer is that it has already started.
In third world countries we have phone charging services and the like, some of these are already utilizing renewable energy sources.
These will simply continue to expand as the barrier to entry for owning and operating Solar PV etc. continues to decline.
Quoted is an excerpt from commentary on the energy outlook for the next couple of decades
Over the next 25 years, the world’s growing energy needs are met first by renewables and natural gas, as fast-declining costs turn solar power into the cheapest source of new electricity generation. Global energy demand is 30% higher by 2040 – but still half as much as it would have been without efficiency improvements. The boom years for coal are over — in the absence of large-scale carbon capture, utilization and storage (CCUS) — and rising oil demand slows down but is not reversed before 2040 even as electric-car sales rise steeply.
WEO-2017, the International Energy Agency’s flagship publication, finds that over the next two decades the global energy system is being reshaped by four major forces: the United States is set to become the undisputed global oil and gas leader; renewables are being deployed rapidly thanks to falling costs; the share of electricity in the energy mix is growing; and China’s new economic strategy takes it on a cleaner growth mode, with implications for global energy markets.
Solar PV is set to lead capacity additions, pushed by deployment in China and India, meanwhile in the European Union, wind becomes the leading source of electricity soon after 2030.
There are lots of DIY guides on the internet that show how one can start generating their own electricity on a small scale, doing this will provide valuable experience for if one ever starts a small enterprise generating electricity.