Rabot Energy, a Hamburg, Germany, startup that supplies renewable electricity on tariffs that follow the wholesale power price, has closed a €50M Series B round. Endeit Capital, a European growth investor, led the round, and the DeepTech & Climate Fonds (DTCF), a German state-backed fund, joined it as a new investor.
Existing investors HV Capital, High-Tech Gründerfonds (HTGF), Bosch Ventures, CNI, Acurio Ventures and vent.io also put money in. Rabot plans to spend it on growing its offer for households and for commercial and industrial customers in Germany, building out its technology platform, and connecting more home batteries, wallbox chargers for electric vehicles (EVs) and heat pumps.
Jan Rabe, the company’s co-founder and chief executive, wants those devices to act together rather than on their own. “The next generation of power plants will not be built; it will be connected,” he said. With the Series B, he added, Rabot is “turning individual households into a network that helps stabilise the power system”.
How Rabot’s Tariffs Work
Rabot’s website puts its dynamic tariffs first. On the main one, the price a customer pays for each unit of energy follows the exchange price, which is set in 15-minute slots, with taxes, levies, grid fees and a monthly base fee added on top. Customers can cancel monthly.
Rabot also sells a dynamic version with a price cap on a 12-month contract, plus a plain fixed-price tariff. The company says its dynamic tariff works even without a smart meter, with customers reporting readings through its app each month. Billing by the quarter hour needs a smart meter, which customers can order through Rabot.
The app shows usage and costs and lets customers control connected devices, and Rabot offers separate tariffs for EV charging and heat pumps. The company says it uses artificial intelligence (AI) to decide when flexible loads, such as car charging, draw power, moving them into cheaper hours.
Customer Numbers Behind The Round
Rabot says it has signed up more than 200,000 customers in about three and a half years, around 15,000 of them commercial and industrial. When Bosch Ventures took a stake in July 2025, the company reported more than 100,000 customers and over 130 staff across offices in Berlin, Hamburg and Munich.
The company also says it supplies more than 600 million kilowatt-hours (kWh) of renewable electricity and that revenue has grown to €200M, without saying over what period. By its own calculations, customers saved a combined €45M in 2025 compared with their local default supplier’s tariff. None of these figures has been checked independently.
Rabe founded Rabot in 2021 with Maximilian Both, and the company first traded as Rabot Charge. The pair had earlier founded Wechselpilot, a service that moves households to cheaper energy suppliers. Rabot Charge had raised €4.5M in total by April 2023, when HTGF joined its seed round.
From Tariffs To Plug-In Batteries
In June 2026 Rabot launched Rabot Flow, a bundle of a dynamic tariff, a smart meter and a plug-in home battery that stores power when it is cheap so the household can use it later. The entry model stores 2 kWh and starts at about €400, and Rabot says it pays for itself in three to four years.
Rabot built Rabot Flow for people living in flats, since home batteries in Germany have mostly gone into owner-occupied houses. The battery plugs into a normal socket and needs no solar panels, and the company says it saves around €120 a year once the battery has paid for itself.
Since 1 October 2026, Deutsche Telekom has offered three Rabot tariffs through its customer app: two fixed-price deals and one dynamic tariff with a 12-month price cap, which can come with the battery. Rabot signs the contracts, supplies the power and runs customer service, while Telekom brings in the customers.
Why Investors Back Flexible Demand
Sara Resvik, a partner at Endeit, framed the round around flexibility, meaning electricity use that can move to the hours when wind and solar power are plentiful. “The energy transition in Germany is reaching a point where flexibility is becoming just as important as expanding renewable energy,” she said.
Resvik said Rabe’s team has “built a profitable core business” and the technology to manage electricity demand at scale. Anne Hinze, a senior investment manager at DTCF, said Rabot uses “innovative energy tariffs and an intelligent energy management platform” so that households can gain from price swings in an ever more volatile market.
Rabot calls the network it wants to build a virtual power plant, a group of home devices steered together like one larger power station. The company estimates that one million connected households could shift up to 0.8 gigawatts (GW) of demand at times of high renewable output, which it likens to one conventional power plant unit. Rabot has not published how many devices it steers today.
Germany’s Tariff Rule And Meter Gap
Every electricity supplier in Germany has had to offer at least one dynamic tariff since 1 January 2025, according to the Bundesnetzagentur (BNetzA), the federal network regulator. The regulator also publishes modelled dynamic prices for a typical household on its market data platform.
Smart meters, which let suppliers bill such tariffs by the quarter hour, are still rare. The BNetzA counted 3,172,579 installed by 30 June 2026, just 5.9% of the country’s 54.1M metering points. Since March 2026 it has opened supervisory proceedings against 434 companies that fell short of a 20% rollout mark. Germany’s smart meter rollout still trails much of Europe.
Verbraucherzentrale Niedersachsen, a consumer advice centre in the German state of Lower Saxony, points out that there is no legal price ceiling on dynamic tariffs and that savings depend mostly on being able to shift use to cheaper hours. It sees the strongest case for households with high, flexible use, such as those with heat pumps, electric cars or batteries.
Where Rabot Stands Now
Rabot Energy now has fresh Series B money from Endeit, DTCF and its earlier backers. It plans to sign up more households and businesses in Germany, build out its technology platform and connect far more batteries, chargers and heat pumps to it.
The company built its business on tariffs that follow the wholesale power price, and it now wants the devices in its customers’ homes to work together as one flexible pool. Its customer, revenue and savings figures come from the company alone, as does its estimate of what a large fleet of home batteries could add to the grid.
The market is moving its way, since every German supplier now has to offer a dynamic tariff. The catch is the meter. Smart meters, which make these tariffs work in full, are still rare in German homes, and how quickly that changes will shape how far Rabot can grow.
