So 7.5 years. Solar/wind are dropping in price at double-digit percentages per year, as are numerous metrics for battery storage for cost. in 8 years, solar/w

So 7.5 years. Solar/wind are dropping in price at double-digit percentages per year, as are numerous metrics for battery storage for cost. in 8 years, solar/wind with -10% (which is actually conservative in the last 20 years, solar has been dropping 15-20% per year I believe) will be only 40% of the current cost.