Pomegra
Hamburg's Rabot Energy closed a $50M Series B led by Endeit to scale dynamic tariffs and home-battery virtual power plants toward one million customers.
Key Takeaways
- Rabot Energy closed a $50M Series B on October 15, 2026, led by Endeit; valuation was not disclosed.
- The company reports 200,000+ customers and €200M in turnover after 3.5 years of operation.
- Funds go toward a one-million-customer target and a home-battery virtual power plant.
Lead
Rabot Energy, the Hamburg supplier of dynamic electricity tariffs, closed a $50M Series B on October 15, 2026. Endeit, a growth capital investor focused on European tech scale-ups, led the round alongside the DeepTech & Climate Fonds (DTCF). Existing backers HV Capital, High-Tech Gründerfonds, Bosch Ventures, CNI, Acurio Ventures and vent.io also took part. The company has not disclosed a valuation.
The money is meant to move Rabot from a retail power supplier to something closer to an energy-systems operator. Management wants to reach one million customers and build out its own technology platform, which pools household batteries into a virtual power plant.
What Does Rabot Energy Actually Sell?
Rabot sells electricity priced by the hour, tracking wholesale market movements instead of a flat rate. Customers who shift consumption to cheap, renewable-heavy hours pay less. The company has offered such tariffs in Germany since 2021.
In June 2026 it launched Rabot Flow, a bundle of a dynamic tariff, a smart meter and a plug-and-play home battery. The company claims the package cuts household energy costs by about 15%. Rabot says its customers saved a combined €45M against default tariffs in 2025, and that it has supplied more than 600 million kilowatt-hours of electricity.
Both savings figures come from the company, and neither has been independently audited. Savings from dynamic pricing also depend heavily on household behavior and on wholesale price spreads in a given year.
How Big Has the Business Become?
Rabot reports more than 200,000 customers, about 15,000 of them commercial and industrial, and turnover of €200M. That growth took roughly three and a half years.
The comparison with the prior round is stark. Rabot closed a €17.5M Series A in January 2024, when it had about 35,000 customers. The customer base has since grown nearly sixfold, and the Series B is close to three times the size of the Series A if the amounts are compared in euros.
Coverage of the round is split on currency: English-language outlets cite $50M, while German announcements cite €50 million. The two figures differ by a margin that matters for valuation comparisons later.
Why Does the Virtual Power Plant Matter to Investors?
A virtual power plant matters because it turns a commodity retail margin into a flexibility product that grid operators and energy traders pay for. Rabot would charge home batteries when renewable power is abundant and cheap, and discharge them when supply is scarce. Planned integrations include EV chargers and heat pumps.
Retail electricity is a thin-margin business: turnover of €200M says little about gross profit, which Rabot has not published. Endeit partner Sara Resvik described the company as having "built a profitable core business," but no earnings figures accompany that claim. The investment case therefore rests on the unproven second leg, where aggregated batteries earn revenue beyond the supply spread.
CEO Jan Rabe framed the strategy in a statement: "The next generation of power plants will not be built; it will be connected."
What Are the Risks?
Customer acquisition in German retail power is expensive and customers churn quickly when a cheaper offer appears. Dynamic tariffs also depend on smart meter rollout, which has proceeded slowly in Germany. Bundling hardware such as batteries adds working capital and inventory exposure that a pure supplier does not carry.
Competition comes from incumbent utilities that have launched their own dynamic tariffs, and from other flexibility aggregators. Rabot's argument is that owning the supply relationship, the metering and the optimization software in one stack lets it capture value that each separate player only partly sees.
Outlook
The round gives Rabot capital to chase one million customers and to test whether household batteries can be aggregated into a revenue stream of their own. The milestones to watch are the Rabot Flow attach rate among the existing base, disclosed margins, and the first contracted flexibility revenue from pooled batteries. Until a valuation and profit figures surface, the round shows investor appetite for the model more than it proves the economics.
