Here's the price/watt of solar panels over the last 45 years: https://avc.com/2015/07/the-bull-case-for-solar/ https://avc.com/2015/07/the-bull-case-for-solar/

Here's the price/watt of solar panels over the last 45 years: https://avc.com/2015/07/the-bull-case-for-solar/ https://avc.com/2015/07/the-bull-case-for-solar/ It's very much following the same exponential decay cost as microchips, probably because solar panels are also semiconductors. We put in solar a couple years ago; our neighbors put it in about 10 years ago; our array covers half the roof area that theirs does (and only about 20% of our roof, despite living in close to a worst-case lot for solar). Payback period was about 9 years when we put it in, but with recent rises in energy costs we're looking at a 4-5 year payback period. I expect a lot of pain this decade with switchover costs - it takes a big capital investment to switch all our energy infrastructure over from fossil fuels to electric, and there are still some unsolved problems like producing batteries (or other energy storage) at scale. But in terms of both physics & economics, renewables do have the potential to solve our energy problems.