Batteries are growing by 70 per cent a year. In Germany, the talk is of hydrogen visions.

The news

The US battery storage market is growing faster than any other energy segment in the country. The Energy Information Administration (EIA) reports average growth of 70 per cent a year over the last three years. In the first half of 2026 alone, 8.3 gigawatts of capacity were added. For the second half of 2026 the agency expects a further 14 gigawatts, and 26 for 2027. The Solar Energy Industries Association counts the same market in energy rather than power: almost 10 gigawatt-hours of new storage in the first quarter of 2026, up 32 per cent on the previous year.

This isn't a forecast. These are installed systems, connected to the grid.

Why it matters

Batteries solve a problem that new power stations trip over: speed. A gas power station takes years to permit and build. A battery storage system can be connected to existing infrastructure, faster and cheaper. According to BloombergNEF, batteries became around a quarter cheaper in 2025, while gas hit a record high. Ember puts global additions in 2025 at an estimated 250 gigawatt-hours, up 46 per cent, with costs down around 45 per cent for the second year running.

The driver is the same one that is straining the grids: data centres. According to the IEA, their electricity consumption grew by 17 per cent in 2025 to 485 terawatt-hours. Governor Greg Abbott puts connection requests in the Texas ERCOT grid at around 474 GW, around 90 per cent of them from data centres. Oncor alone, the state's largest transmission operator, reports around 282 gigawatts of requests from data centres as of 30 June 2026. It is exactly this demand that is pushing hyperscalers towards batteries to get onto the grid faster.

The DACH lever

For German industry, the message is concrete. First: batteries are moving into the appliances. Carrier, the 120-year-old inventor of modern air conditioning, is testing central air-conditioning units with a built-in battery. HVAC accounts for around 300 of the 750 gigawatts of peak load in the US. Shift part of that in time and the whole system gets relief. Start-ups such as Every Electric attach power banks to window air conditioners and control them by software as a single resource. According to Canary Media, Every Electric has delivered over 1,000 batteries to around 600 homes, with enquiries on hand for around 10,000 units.

Second, the battery market is shifting into defence. Sila, founded by former Tesla specialist Gene Berdichevsky, received a conditional $1.4 billion loan from the US Department of Defense on 7 August for its silicon-carbon anode material. The reason: graphite supply chains are dominated by China. Silicon stores 20 to 40 per cent more energy. Sila already has contracts with Mercedes and Panasonic. The plant expansion in Moses Lake is set to supply material for over 100,000 electric cars.

Third, the special cases, handled with caution. Organic flow batteries (Quino Energy, XL Batteries) are aimed at long-duration storage. Quino Energy cites storage durations of 8 to 24 hours, plus shorter applications with several cycles a day, where lithium-ion falls down on cost and supply chain. XL Batteries cites installed costs of under $200 per kilowatt-hour for long storage durations. What is documented is a pilot at Stolthaven in Houston; commercial scaling is still to come. For stimulated geological hydrogen (Eden GeoPower, ARPA-E) the evidence is thin: lab results, and a first field pilot at the end of 2027 at the earliest. Rita Esuru Okoroafor of Texas A&M says plainly that no single approach delivers commercial rates on its own.

For grid operators

Two collaborations show where grid control is heading. Eaton received a $7 million, 24-month contract from the Air Force Research Laboratory to apply quantum computing and machine learning to the contingency problem in the grid, together with Infleqtion and Penn State. In parallel, IEEE has launched an online course that takes grid engineers from AI basics to physics-informed models. According to IEEE Spectrum, sensors, smart meters and grid monitors deliver more data than human operators can analyse in time.

The honest caveats

Batteries aren't risk-free. A fire in Monterey County, California, forced evacuations last year, albeit with a chemistry that has since been largely replaced. Recycling and lithium supply chains are lagging behind the pace. In the US, the Trump administration is politicising the landscape: $3.93 billion to offshore wind developers for not building, most recently $1.2 billion to Germany's RWE. Solar manufacturers get tariffs as a shield. According to Heatmap, the average electricity bill hit an all-time high of $217 in July, at 19 cents per kilowatt-hour, almost unchanged from June.

The point for you: the battery market runs on hard numbers. The rest of the grid story, hydrogen and long-duration storage, runs on promises. Telling the two apart is the business.

24 sources analysed, none excluded for being behind a paywall.