While the Senate proposal would eventually remove credits provided by the Biden administration’s Inflation Reduction Act, analysts at J.P. Morgan and Mizuho said the Senate version is better for shares of solar and other renewables companies than the version passed by the House of Representatives in late May.

U.S. solar stocks dropped in premarket trading on Tuesday after a Senate panel proposed a full phase-out of solar and wind energy tax credits by 2028, as part of changes suggested to President Donald Trump's sweeping tax-cut and spending bill.

Shares of US solar companies fell sharply after Senate Republicans released a bill that would end clean energy tax credits earlier than expected, dashing hopes that major cuts passed by the House wouldn’t stick.