1KOMMA5° Raises €70M at $1.35B to Expand Heartbeat AI

German home-electrification company 1KOMMA5° has raised €70 million from new and existing investors at a reported $1.35 billion valuation, adding capital for its Heartbeat AI energy-management platform and a potential US expansion.

Marunouchi Innovation Partners joined as a new investor through its climate-tech growth fund. The company did not publicly identify every returning investor or assign a formal round label, so the financing should be described as growth equity with the stage undisclosed, not as a new Series C or pre-IPO round.

The deal was disclosed on October 12, 2026. It is separate from the €1 billion of household financing that 1KOMMA5° said it mobilized with banks and other partners earlier this year.

1KOMMA5° financing: the deal at a glance

That classification prevents two common errors. The company is not raising €100 million: that is the amount it plans to invest in Heartbeat AI during 2027. Nor is the €1 billion household-finance program new corporate equity.

Why Marunouchi matters to the US plan

Marunouchi Innovation Partners manages a Mitsubishi Corporation-led climate-tech growth fund. It invests in scaling companies across next-generation energy, storage, low-carbon materials and carbon-management technologies.

For 1KOMMA5°, the investor adds a strategic bridge rather than simply another cheque. Chief executive Philipp Schröder told Reuters that the company is considering entering the United States next year and sees strong investor interest behind that possibility.

A US move would expose 1KOMMA5° to a large residential-energy market but also to fragmented state regulation, tariff uncertainty and intense competition. The company had previously shelved US IPO plans in 2025 as renewable-energy and trade policy became less predictable.

Marunouchi’s experience financing climate technologies internationally may help 1KOMMA5° assess partnerships and market-entry risks before committing to a full launch.

Heartbeat AI is becoming the core valuation argument

1KOMMA5° began as an integrated installer of solar panels, batteries, heat pumps and EV chargers. Its higher-value ambition is to coordinate those devices through software.

Heartbeat AI automates when a household buys, stores, uses or sells electricity. It also supports metering, billing and participation in electricity markets. The result is a virtual power plant assembled from distributed household assets.

That software layer matters because installation is operationally intensive and typically earns project-like margins. Energy optimization can create recurring revenue and deepen the relationship after the hardware is installed.

The company says it plans to invest more than €100 million in Heartbeat AI in 2027. That spending target exceeds the newly announced financing, implying that operating cash flow and other resources will fund part of the program.

The operating case—and what still needs verification

In September, 1KOMMA5° said it expected approximately $750 million of revenue in 2026, with 35% to 40% full-year growth. It also said its core hardware segment was profitable and projected about €40 million of EBITDA.

Those figures make the financing different from a rescue round for a cash-burning installer. Investors appear to be underwriting a transition from a fast-growing hardware and installation business toward an energy-software and market-participation platform.

The key numbers are company targets, not audited full-year results. Investors will want proof in four areas:

• Recurring software economics: revenue and margin attributable to Heartbeat AI.
• Connected capacity: growth in controllable household assets, not just installations sold.
• Customer savings: realized savings under dynamic tariffs and grid-market participation.
• Regulatory portability: whether the model works across national and eventually US electricity markets.

Competition is broader than rooftop solar

1KOMMA5° competes with Enpal and other integrated residential-energy platforms for installations and customer financing. It also overlaps with heat-pump specialists such as Thermondo, battery and virtual-power-plant providers such as Sonnen, and larger ecosystems including Tesla Energy.

Its differentiation is vertical integration: local installation capacity, multiple hardware categories and a proprietary energy-management layer under one brand.

The challenge is execution complexity. Every country has different subsidy rules, metering standards, grid-market access and installer economics. Expansion can add revenue while also increasing working capital and operational risk.

What the $1.35 billion valuation implies

The valuation is modestly above unicorn status but still demands more than an installation roll-up. The investment case depends on Heartbeat AI becoming a scalable control layer for distributed energy assets.

If software adoption grows faster than hardware revenue, 1KOMMA5° could improve margins and build a more defensible customer network. If the software remains mainly a feature bundled with installations, the company will continue to be valued against capital-intensive energy-service peers.

The next decisive evidence will be 2027 performance: delivery against the €100 million AI investment plan, progress toward a US launch and proof that recurring software and market revenues are scaling.

Editorial accuracy notes

• The €70 million financing and $1.35 billion valuation were reported on October 12.
• The company disclosed Marunouchi Innovation Partners as a new investor but did not name every returning backer.
• The formal round stage was not disclosed.
• The planned €100 million-plus Heartbeat AI investment is future company spending, not the round size.
• The earlier €1 billion household-financing program is separate from this equity raise.