Profitable Belgian CleanTech Octave.energy raises €10 million to scale BESS and EMS solutions across Europe
Octave.energy, a Mechelen-based CleanTech startup, has raised €10 million in Series A funding to accelerate its expansion across Europe and further develop its Battery Energy Storage System (BESS) and Energy Management System (EMS) solutions.
The round comprises equity and flexible debt financing and was led by SPDG Growth, the family office of the Périer-D’Ieteren family and an investor in Octave.energy since its Seed round. imec.istart, BNP Paribas Fortis and KBC also participated in this round.
“Octave.energy brings a deep integration between batteries and EMS, a relentless focus on uptime, and the freedom for clients to monetise their flexibility on the energy markets with the optimiser of their choice. With this funding, we can bring what we’ve built to many more companies across Europe,” the company mentioned in its LinkedIn post.
Founded in 2020, Octave.energy develops smart battery energy storage systems for industrial customers, SMEs, and the agricultural sector. Its journey started with the development and production of its own circular battery storage system, including integrated control and monitoring. Today, the company focuses on first-life LFP battery energy storage systems and offers customers fully integrated batteries and EMS solutions.
According to the company, electrification across Europe is accelerating faster than grid capacity can keep up. For businesses, this translates into grid congestion, volatile electricity prices and limitations on how quickly they can electrify or expand their operations.
The Belgian startup states that battery storage can help solve these challenges, but the battery itself is only part of the solution.
Octave.energy claims to combine Battery Energy Storage Systems (BESS) with its own Energy Management System (EMS) to help businesses derive more value from their energy assets. The technology enables companies to increase the use of their own solar energy, reduce peak consumption, manage EV charging, access additional power in grid-constrained areas, and leverage available flexibility in energy markets.
The company reports that, since its inception, it has delivered battery systems representing more than 200 MWh of storage capacity and served over 400 businesses, from SMEs to large companies. Notable clients include Colruyt Group, McDonald’s, Eneco, Naturgy and Nextensa.
Octave.energy has been profitable for three consecutive years and generated €16 million in revenue in 2025.
The company plans to use this capital to bring its approach to more businesses across Europe. It primarily aims to expand its local sales and operations teams in the Netherlands, France and Germany, while also continuing to grow through its network of installation partners. Its first projects are already operational in Luxembourg, the Netherlands and Spain.
This funding will also support the continued development of its EMS and asset management platforms, with a strong focus on ensuring that battery systems continue to perform throughout their entire lifetime.
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