Ask most people what Huawei sells and you will get smartphones, or 5G, or a decade of geopolitical argument. Almost nobody says solar inverters.

Yet Huawei Digital Power Technology, the division that makes them, along with battery storage systems and electric-vehicle charging kit, booked 68.7bn yuan of revenue in 2025, up 24.4% on the year before, according to the group’s annual report.

The comparison that makes the number legible is Tesla. Its energy generation and storage division, the Megapack and Powerwall business that Wall Street has spent two years calling the good half of the company, turned over $12.77bn in 2025, up around 27%, on record deployments of 46.7 GWh. Two businesses, similar size, similar growth rate, wildly different levels of public attention.

Tesla’s energy arm is discussed on earnings calls, in analyst notes, and on a great deal of social media. Huawei’s is discussed by procurement managers.

Some of that asymmetry is structural. Huawei is unlisted, employee-owned, and reports once a year in a document that runs to several hundred pages, of which Digital Power occupies a line.

The group as a whole booked 880.9bn yuan of revenue and 68bn yuan of net profit in 2025, which means the energy business is roughly 8% of the whole and would still be a substantial company if it were spun out tomorrow.

Some of it is that the West stopped looking. Huawei has been shut out of telecoms networks across much of Europe and North America on national security grounds, and the reflex that follows a ban is to assume the company shrank. It did not.

It went sideways, into the equipment layer of the energy transition, where the political temperature is lower and the margins are respectable.

Solar inverters are a good business to be quietly enormous in. They are unglamorous, standards-driven, and hard to displace once installed, and they sit at the point where a solar array meets the grid, which is to say at the point where the data is.

What the annual report does not do is break the division into product lines. How much of the 68.7bn yuan comes from inverters as against storage systems or charging infrastructure is not disclosed, and neither is the unit’s profit. Investors in any listed competitor would riot. Huawei has no investors to riot.

The growth is coming from places that are not America or Europe. Brazil in particular has become central, and Huawei signed a partnership with SECPower in December to expand energy storage there, timed to a new Brazilian law that introduced an hourly competitive mechanism and widened incentives for storage.

Africa is the other pillar, where Huawei has leaned on localised services to build out installed base.

None of this happens in a vacuum. Chinese manufacturers already dominate the panels themselves, to the point that Europe has been stockpiling €7bn of Chinese solar in the name of energy security, an argument that eats its own tail if you look at it for long enough.

Beijing, meanwhile, is trying to wire renewable generation directly into its data centres, and Europe is discovering the hard way, as in Denmark’s pause on grid connections, that AI load and clean power do not automatically arrive in the same place at the same time.

The pattern is familiar to anyone who has watched China’s industrial climb in solar, batteries, and electric vehicles.

Enter a hardware category that Western firms consider low-margin plumbing, take volume, take standards, take the installed base, and then find that the plumbing was the strategic asset all along.