Startup Spotlight: Furo raises $4M to plan, control and trade industrial battery capacity

Why it matters

Furo is trying to carry industrial battery projects from sales modeling into live control and electricity trading. Its conflicting site totals also show why investors and customers need deployment figures that distinguish simulations from batteries operating in production.

Lena Sophia Voss (@lenasophiavoss), Leonie Wagner and Simon Wittner have raised $4 million for Furo, a Munich developer whose software sizes industrial batteries, controls installed systems and markets spare capacity. Furo reports thousands of sites, but its public materials use totals ranging from more than 3,500 to more than 6,000 and do not disclose how many batteries are under live control.

Furo's funding announcement says the round was announced on September 10th and led by TQ Ventures, with participation from Neo, Sandberg Bernthal Venture Partners and CDTM Venture Capital.

The three 28-year-old founders briefly built the company from the U.S. before returning to Germany, where they believed industrial energy costs created a more urgent problem and their local network could reach early customers, according to TechCrunch. Furo remains a Delaware C corporation. Its founders work from Munich and return to the U.S. three or four times a year for administration and investor meetings, Voss told TechCrunch.

Three technical careers converge on energy

Voss, Wagner and Wittner met through the Center for Digital Technology and Management, an interdisciplinary technology and management program in Munich. They later studied at Stanford and the University of California, Berkeley, and their collective work history included Apple, Google X and AI businesses in San Francisco, according to TechCrunch. The supplied sources do not assign those schools and employers to individual founders.

The founders started Furo in 2025 as Lumera Energy and briefly built from the U.S. while participating in Neo's accelerator. All three had full-time offers and visas that would have allowed them to remain in the country, Voss told TechCrunch. Returning to Germany was an operating decision: Furo needed early customer access, referrals from an existing network and people who understood how industrial energy projects are bought and deployed.

"We're currently moving faster in Europe than if we'd have stayed in the U.S.," Voss told TechCrunch.

The local network also changes Furo's cost base. Voss told TechCrunch that German engineering salaries allow Furo to hire strong technical staff for less than comparable Silicon Valley compensation, while Munich's universities provide a recruiting pool with less competition from the largest technology employers. Investors initially questioned whether Furo's hiring budget was sufficient, she said, before learning it sat near the high end of the German market.

The battery is only as smart as its schedule

Furo sells hardware-agnostic software for commercial and industrial battery systems. The platform covers three jobs that are often handled by separate products or service providers: sizing a battery before purchase, controlling it once installed and selling spare capacity into electricity markets.

The PLAN product takes a site's load profile and location, then calculates a proposed battery size, operating strategy and projected economics. It also creates documents that installers and project developers can present to customers. According to Furo's OPERATE page, Furo forecasts site load, solar generation and electricity prices, then derives an operating strategy.

The scheduling problem is harder than buying low and selling high. A factory may need a battery to absorb excess solar generation, cut a short demand spike that would increase grid charges, reserve backup power and shift electricity purchases toward cheaper hours. Those uses compete for the same capacity. Furo says its software forecasts conditions up to 48 hours ahead and continuously assigns capacity to whichever use produces the highest economic value.

FLEX adds market participation. Furo says FLEX can combine industrial batteries below 1 megawatt into a virtual portfolio for participation in day-ahead and intraday markets.

Wittner described the product expansion in a May founder post. Lumera began as a simulation tool for industrial battery projects. Once the first systems went live, the founders found that sophisticated financial plans were being handed over to batteries running static control rules. "A perfect simulation is worthless if the batteries are operated dumb," Wittner wrote.

That realization led to the Furo rebrand and a broader platform spanning planning, live operation and trading. It also moved Furo closer to the economic outcome customers care about. A projected return can help an installer sell a battery. Real-time control determines whether the customer receives that return after the hardware is commissioned.

Early customer evidence, with uneven denominators

TechCrunch identified Deutsche Bahn as an enterprise customer about a year after Furo's founding. Furo's homepage includes an Enpal case study and displays energy-sector businesses including Connectika, ecocoach, BayWa r.e., sonnen and SegenSolar as references or partners, but the supplied materials do not specify the commercial relationship or contract size for each.

Furo's usage figures require similar care. Furo cited more than 3,500 sites in an earlier May release, while the September announcement cites more than 5,000 industrial sites and more than 6,000 sites across several user and partner categories. The September announcement also says more than 800 installers, developers, manufacturers and utilities sell or use Furo.

Those figures may describe different stages of the sales and deployment pipeline. A site can be simulated during planning without running Furo's control software in production, while an installer may use the software across multiple customer projects. Furo has not published a breakdown separating planned, simulated, contracted and live sites. The 800-company figure also covers several kinds of channel partner and should not be read as 800 industrial customers.

Furo says its software can reduce electricity costs by as much as 40%. Furo reports a BayWa-related example with a payback period below five years. These are claims from Furo and a partner rather than independently audited portfolio results. Actual savings depend on a site's consumption pattern, tariffs, grid charges, battery cost, available market access and the degradation caused by additional charging cycles.

The discrepancy in site counts matters because Furo's technical advantage should strengthen with operating data. Thousands of completed simulations can improve sales tooling and project design. Thousands of batteries under live control would provide a different and potentially more valuable dataset: real consumption, dispatch, price, weather and degradation behavior across industrial sites. Furo's public numbers do not yet show how much of the footprint has reached that stage.

A crowded market with different starting points

Battery optimization is already attracting larger rounds and several business models. Finland's Capalo AI raised an €11 million Series A in February for a virtual power plant focused on optimizing and trading large-scale and renewable-linked batteries. Capalo AI said its contracted battery capacity exceeded 1 gigawatt in 2025.

Munich-based Entrix offers services across battery sizing, business planning, financing, grid onboarding, market access, live optimization and monitoring. Berlin-based FION Energy goes further into physical deployment, combining site analysis, installation and software-controlled operation for industrial customers.

Furo's chosen position is narrower operationally and broader in software. Furo does not need to manufacture or install batteries. Its software is designed to work across different hardware vendors and move with a project from the sales proposal into dispatch and trading. That makes installers, battery manufacturers, utilities and project developers distribution partners rather than groups Furo must replace.

What the $4 million buys

Furo says the round will fund product development, hiring and expansion into additional European markets. Furo is also preparing for a U.S. market entry, although it has not set a launch date.

Europe remains the immediate proving ground. Germany combines industrial electricity demand, renewable generation, complex grid charges and price volatility in a way that gives batteries several possible jobs. That complexity gives Furo a demanding market in which to test whether its software can produce measurable savings.

The founders still have to turn promising distribution into durable software revenue. The next evidence will come from the number of batteries under live control, the share of customers using multiple Furo modules, realized savings after degradation and market fees, and whether channel partners standardize Furo across their installations.