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)
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)