Then you'd get stuck buying half assed divisions of a bunch of F500 companies who get into the market just to profit off you. Plus you'd need unlimited capital

Then you'd get stuck buying half assed divisions of a bunch of F500 companies who get into the market just to profit off you. Plus you'd need unlimited capital for this plan. And current solar companies might go bankrupt before solar hits the scale needed to compete with fossil fuels. And the DOJ would sue you for antitrust violations. Standard Oil did your plan. That sort of thing won't be allowed again.