The energy savings were sold by HD twice - once to the customer (who pays a premium for less energy usage, and may also have claimed federal tax credits), and once more to America Efficient (who sold them to the state / grid operator non-profits).
It's an interesting kind of subsidy arbitrage - since businesses can benefit from subsidies that consumers cannot, it creates an incentive to carve out the subsidy-granting-essence from consumers sales and sell them on in aggregate.
The original source for this was Matt Levine over at Bloomberg. His take is also quite good: https://www.bloomberg.com/opinion/newsletters/2026-04-30/sel...