Shortly after President Joe Biden took office and began to develop his Build Back Better plan, leading solar companies formed the Solar Energy Manufacturing for America Coalition, or SEMA, lobby for industry-wide domestic content standards. But they didn’t have to lobby for long. The Inflation Reduction Act, which included many of the provisions the coalition hoped to see become law, was something of a dream come true — and it happened far earlier than anyone had thought likely. With the IRA now in force and awaiting some implementation clarifications from the IRS, SEMA’s work, it seems, is just beginning. There’s no shortage of demand for renewable energy, and leading solar companies have begun to roll out major manufacturing expansion plans in the U.S. However, crafting the domestic solar energy supply chains of the future will require ongoing, concerted effort by industry and policy leaders — potentially up to five years before factories are up and running at scale, according to some industry experts.