U.S. subsidizes solar facilities built partly with American-made components

New subsidy offers tax credits for solar energy projects using some U.S.-made equipment.
To qualify for bonus, 40% of manufactured products' cost must be U.S.-made.
Solar cells can be foreign-made if other facility components meet domestic content threshold.
Top solar group says panels assembled in U.S. should qualify regardless of cell origin.
Subsidy part of Biden's Inflation Reduction Act aimed at speeding growth of clean power.