Germany's Battery Storage Reaches 29.8 GWh After a Record First Half of 2026

Germany had about 29.8 GWh of battery storage installed by early July 2026, up 37% in a year, with roughly 75% of it in homes, according to a 1KOMMA5° analysis. A separate analysis by IWR, published on 20 July, found about 5.6 GWh was added in the first half of 2026, up from 3.2 GWh a year earlier.

The installed base

Solarserver reports that 1KOMMA5°, a German home energy company, used data from battery-charts.de (RWTH Aachen) plus its own calculations. Installed capacity rose from 21.8 GWh in June 2025 to 29.8 GWh in early July 2026, an increase of about 8 GWh. The same analysis puts home storage at about 75%, or roughly 22 GWh, with commercial and large-scale storage making up the rest.

The first-half additions

IWR analysed the Bundesnetzagentur's Marktstammdatenregister, the official register of installed energy assets. It counts about 5,642 MWh of new storage in the first half of 2026 against 3,206.4 MWh in the same period of 2025. By our own arithmetic that is about 76% more. The article we read does not say what share of the new capacity was in homes.

How to read the two sets of numbers

The two analyses use different sources and methods, so they should not be added together or compared directly. One is a company's calculation from a research database, the other a count from the official register. Both point the same way, towards fast growth, but we could not confirm exactly how they treat late registrations or systems not yet entered into the register.

Why it matters

Germany is one of Europe's largest home battery markets, and growth there tends to bring cheaper hardware and more installers across the region. The new EU rule on registering larger batteries, covered in our registration rule report, is one example of the regulation that follows a market of this size. For German rules and incentives, read our Germany country guide, and for the wider picture see Europe's new growth phase.

Sources

• Solarserver: Batteriekapazität in Deutschland steigt auf 29,8 GWh
• IWR: Battery storage additions in Germany on record pace in first half of 2026

Related guides

Keep reading, or check your own numbers:

• Germany country guide
• Europe's home battery market enters a new growth phase in 2026
• New EU rule: every home battery over 2 kWh must be registered