Solar panels typically generate electricity at only around 13% of their stated capacity. For wind mills, it's around 22%. And those figures vary by month.

Clean energy advocates were already bracing for a Republican-led bill that would phase out tax credits for wind, solar and other renewable energy as President Donald Trump and GOP lawmakers moved to dismantle the 2022 climate law passed by Democrats under former President Joe Biden.

Wind and solar companies were already bracing for Congress to end federal subsidies. But the Senate bill goes even further and penalizes those industries.