Pomegra
Hamburg's Rabot Energy closed a €50M Series B led by Endeit to link home batteries into a virtual power plant and grow from 200,000 to 1 million customers.
Key Takeaways
- Rabot Energy closed a €50 million Series B on October 15, 2026, led by Endeit and the DeepTech & Climate Fonds.
- Existing backers HV Capital, High-Tech Gründerfonds, Bosch Ventures, CNI, Acurio Ventures and vent.io also joined. Valuation is undisclosed.
- The company plans to grow from about 200,000 customers to 1 million and pool household batteries into a virtual power plant.
Lead
Rabot Energy, the Hamburg-based electricity supplier, announced a €50 million Series B round on October 15, 2026. Some English-language outlets list the figure as $50 million. European growth investor Endeit and Germany's DeepTech & Climate Fonds (DTCF) led the round. The company will use the money to expand its customer base fivefold and to connect household battery storage into a virtual power plant. It did not disclose a valuation.
Who Backed the Round?
Endeit and DTCF led, and every earlier institutional backer returned. HV Capital, High-Tech Gründerfonds, Bosch Ventures, CNI, Acurio Ventures and vent.io all took part. Full participation from existing investors is a modest vote of confidence in the company's progress since the last round.
The round is also a step up in scale. Rabot raised €17.5 million in its January 2024 Series A, led by HV Capital, after roughly €4.5 million in earlier seed funding. Bosch Ventures invested an undisclosed amount in July 2025. The Series B is nearly three times the size of the Series A and more than twice all disclosed equity raised before it.
What Does Rabot Energy Actually Do?
Rabot sells electricity under dynamic tariffs, which pass hourly wholesale prices through to households. It reports more than 200,000 customers, about 15,000 of them commercial and industrial, and says it has delivered over 600 million kilowatt-hours of renewable power. The company states revenue of €200 million. It took about three and a half years to reach the customer count. Its CEO and founder is Jan Rabe.
In June 2026 the company launched Rabot Flow, a bundle of a dynamic tariff, a smart meter and a plug-in battery. The battery has 2 kWh of AC storage, connects to a standard wall outlet and takes about two minutes to set up through an app. Rabot says delivery takes three days and that the bundle cuts an average household's energy costs by about 15%. Because it needs no installer, renters can use it, which widens the addressable base well beyond homeowners with rooftop solar.
How Does a Home Battery Become a Virtual Power Plant?
A virtual power plant works by software coordination, not construction. Thousands of small batteries charge when renewable output is high and prices are low, and discharge when supply tightens. Aggregated, they behave like a single flexible generator that can sell capacity or help stabilise the grid.
Rabot's pitch rests on that logic. Rabe summarised it by saying the next generation of power plants will not be built but connected. The scale is the open question. At 2 kWh per unit, one million batteries would add up to roughly 2 GWh of nominal capacity, and only a fraction of customers will own one. The company has not published how many batteries it has shipped or what revenue the flexibility itself generates.
Why Does This Round Matter for the German Market?
Germany's grid is absorbing growing volumes of solar and wind, and price swings between hours have become a commercial opportunity for anyone who can shift demand. Suppliers with real-time pricing and controllable devices are positioned to capture that spread. Rabot is betting that owning the customer relationship, the tariff and the device in one stack gives it an edge over pure hardware sellers and over incumbents with fixed-price contracts.
The counterpoint is margin. Retail electricity supply is a low-margin business that punished several German suppliers during the 2021 to 2022 price spikes. Battery-based flexibility income could improve those economics, but only if the fleet is large, reliably controllable and accepted by the markets that pay for flexibility. Neither the revenue split nor profitability has been disclosed.
What Comes Next for Rabot?
The near-term test is customer growth from 200,000 toward 1 million, and how many of those customers adopt Rabot Flow rather than the tariff alone. A second marker will be whether the company reports aggregated battery capacity and flexibility revenue as separate lines. Without them, the virtual power plant remains a strategy rather than a measurable business.
Outlook
Rabot Energy has secured €50 million from a mix of growth and climate-focused investors to push a tariff-plus-battery model toward a million customers. The financing is larger and better supported than anything the company has raised before, but the valuation and the economics of the virtual power plant remain undisclosed. Results over the next several quarters, in customer counts and battery fleet size, will show whether the model works beyond the pitch.
