1KOMMA5° Raises €70M in Series C+ to Expand Europe's Largest Decentralized Power Plant

1KOMMA5° Secures €70 Million in Series C+ Funding

1KOMMA5°, a European energy technology company, has raised €70 million in a Series C+ funding round. The round was backed by Marunouchi Innovation Partners. The funding date is October 12, 2026.

What 1KOMMA5° Does

1KOMMA5° was founded with the goal of supplying millions of buildings across Europe with climate-neutral energy at the lowest possible cost, entirely without fossil fuels. The company operates what it describes as Europe's largest decentralized power plant through its "Heartbeat AI" platform.

Heartbeat AI controls electric vehicles, batteries, heat pumps, and air conditioning systems, trading them in real time on the electricity exchange. The system buys electricity when it is particularly cheap and sells when it is expensive. In aggregate, users benefit from nearly free electricity, according to the company.

The concept is positioned as a lower-cost alternative to fossil, centralized power plants. A 2025 Roland Berger study cited by the company suggests it could save up to €255 billion in electricity costs.

Scale and Operations

Heartbeat AI currently manages approximately 50,000 energy systems with a capacity of 600 megawatts, which the company says is roughly equivalent to the output of a modern gas-fired power plant.

1KOMMA5° is active in seven countries and operates 80 locations, providing installation and service as a "one-stop shop" for customers regionally and at high quality.

Funding Details

• Round type: Series C+
• Amount: €70 million
• Currency: EUR
• Funding date: October 12, 2026
• Investor: Marunouchi Innovation Partners

No lead investor was specified in the funding data.

Acquisition Perspective

The Series C+ round provides 1KOMMA5° with additional capital as it scales its decentralized energy platform across Europe. The company's combination of a software-driven energy trading layer (Heartbeat AI) and a physical installation and service network across 80 locations gives it an integrated position in the residential and commercial energy transition. For acquirers or strategic partners, the 600-megawatt managed fleet and seven-country footprint represent a substantial aggregation of distributed energy assets and customer relationships.

The involvement of Marunouchi Innovation Partners adds a new investor to the company's capital structure. The round type indicates a continuation of the company's Series C financing, suggesting ongoing support from existing backers alongside new capital.

Key Takeaways

• 1KOMMA5° raised €70 million in a Series C+ round.
• Marunouchi Innovation Partners participated in the round.
• The company operates Heartbeat AI, which manages roughly 50,000 energy systems totaling 600 megawatts.
• 1KOMMA5° is active in seven countries with 80 locations.
• The company positions its model as a lower-cost alternative to centralized fossil power generation.