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sold $430 million worth of its giant backup batteries called Megapacks to xAI, Elon Musk's artificial intelligence startup, in 2025, according to a filing on Thursday.
The sales to xAI accounted for around 3.4% of Tesla's energy business revenue, which climbed 27% to $12.8 billion last year from $10.1 billion in 2024, the filing said.
Tesla's energy division, which sells solar photovoltaics and battery storage systems of various sizes, was a bright spot for the company, as auto revenue dropped 10% to $69.5 billion, weighed down by a tarnished brand reputation and an aging lineup.
Because autos remain Tesla's predominant source of revenue, total sales fell roughly 3% for the year, declining for the first time on record.
