Tesla’s energy business deployed more batteries in Q3 2026 but brought in less money. Energy generation and storage revenue fell 16% year-over-year to $2.88 billion, even though storage deployments rose 10% to 13.7 GWh.

Tesla’s shareholder letter blames the drop “partially” on “tariff-related customer refunds.” It doesn’t say how much it refunded, to which customers, or why it was accounted for as reduced revenue.

Australia just switched on its longest-duration grid battery, and it runs on 144 Tesla Megapacks.

RWE’s Limondale battery in New South Wales can discharge for a full eight hours — four times longer than the two-hour batteries that dominate the Australian grid. It’s the first project of its kind in the country.