in 2023, minerals percentage starting at 40% either sourced in US or US free trade parters and increase each year 10% til it reaches 100% by 2029 (for the first half of rebate ie $3750)2023, or sooner based on when guidance is issued. They increase in 2024, and the phrasing of the bill confused some people so articles were saying they started in 2024.
Other half $3750 is based on where the battery manufacured or assembled (this one little more confusing)
Also from 2024, if any rebate, it will be applied at point of sale (like most of the state rebates (ex: MA)