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1Komma5 vs Sonnen
October 05, 2025
1Komma5 (€652M)
1Komma5° is aiming to offer households everything needed for a carbon neutral home, including energy storage, charging infrastructure for electric vehicles and solar.
Sonnen ($169.2M)
Sonnen is a German-based pioneer for intelligent lithium based energy storage. The sonnenBatterie is not just a battery, it's an intelligent storage system that automatically adjusts the energy usage in your household. In combination with solar panels the sonnenBatterie will enable you to supply yourself with clean energy – thus making you independent and protecting you from energy price hikes.
1Komma5 and Sonnen are both German energy startups that manufacture and install home batteries for autonomous household power supply and electric vehicle charging. They integrate these home batteries into a smart grid and distributed energy storage system, enabling the balancing of renewable energy power plants.
However, 1Komma5 (founded in 2021) supplies more than just batteries; it positions itself as a one-stop shop for home energy systems, consisting of solar panels, batteries, heat pumps and EV chargers. It is developing a cloud-based platform Heartbeat based on artificial intelligence for managing the virtual power plant and provides users with dynamic tariffs to optimize their expenses. In addition to Germany, the startup already operates in more than seven European countries and even in Australia.
Sonnen (founded in 2010) specializes exclusively in energy storage systems. Users of the Sonnen virtual network can earn income by providing their batteries for load balancing. Sonnen was acquired by Shell in 2019 and has since become its subsidiary. The company also operates in the US and Australia.
However, 1Komma5 (founded in 2021) supplies more than just batteries; it positions itself as a one-stop shop for home energy systems, consisting of solar panels, batteries, heat pumps and EV chargers. It is developing a cloud-based platform Heartbeat based on artificial intelligence for managing the virtual power plant and provides users with dynamic tariffs to optimize their expenses. In addition to Germany, the startup already operates in more than seven European countries and even in Australia.
Sonnen (founded in 2010) specializes exclusively in energy storage systems. Users of the Sonnen virtual network can earn income by providing their batteries for load balancing. Sonnen was acquired by Shell in 2019 and has since become its subsidiary. The company also operates in the US and Australia.
