Sri Lanka, Nov. 7 -- Donald Trump's return to the White House will refocus the nation's energy policy onto maximizing oil and gas production and away from fighting climate change, but the Republican win in Tuesday's presidential election is unlikely to dramatically slow the U.S. renewable energy boom.

Investor fears of a reversal under Trump sent clean-energy stocks down sharply on Wednesday. The MAC Global Solar Energy index (.SUNIDX), was down 10% in midday trade, while shares of top renewable project developer and owner NextEra Energy (NEE.N), slid 6.2%.

A Biden-era law providing a decade of lucrative subsidies for new solar, wind and other clean-energy projects would be near-impossible to repeal, however, thanks to support from Repu...