>His take is that it failed for the same reason it fails today. If your dad thinks solar is failing today I'm not sure he's a very reliable source of informati

>His take is that it failed for the same reason it fails today. If your dad thinks solar is failing today I'm not sure he's a very reliable source of information. Solar has been growing exponentially since the mid 2000s and shows no signs of slowing down - the average year over year growth rate in solar capacity since 2016 is about 26% (doubling every three years). The most common error in understanding and forecasting the growth in solar capacity is underestimating future growth - every IEA prediction for the growth of solar for the last 10 years has been significantly higher than the previous year's prediction, and also a dramatic underestimate of the actual installed solar capacity. Experts in this space have been predicting that the solar exponential will level off next year for a decade, and in all likelihood they will continue doing so for another decade.