Energy StorageNarrow moat

Beyond cars, Tesla has built a genuine and fast-growing energy business — grid-scale battery storage (Megapack) and home batteries (Powerwall) — that has quietly become one of its brightest spots. In 2025, energy generation and storage revenue reached nearly $13 billion, up about 27%¹, with storage deployments up roughly 49%, and it carries gross margins around 30% — making it, notably, Tesla's most profitable segment. As the world electrifies and the grid needs storage to handle intermittent renewables, this is a large and expanding market Tesla is well-positioned in.

The energy business hints at a wider moat than cars alone. It draws on Tesla's battery expertise, manufacturing scale, and software, it addresses a structural need — grid stability and renewable integration — that grows with every solar panel and wind turbine installed, and it diversifies Tesla beyond the brutal economics of the car business into infrastructure with better margins. That the fastest-growing, highest-margin part of Tesla is batteries for the grid, not cars, is an underappreciated and genuinely promising development.

The caveats are that energy storage, for all its growth, remains far smaller than the car business and cannot yet move Tesla's overall results decisively, and that it is a competitive market — battery cell supply is dominated by Asian giants, and other storage providers compete hard. Margins that look attractive today could compress as the market matures and scales. So the energy business is a real, high-quality, growing franchise that genuinely broadens Tesla's story beyond cars and autonomy, but it is not yet large enough to be the whole answer, and it faces its own competitive pressures as the storage market booms.