Cactos

Market position

Cactos states it has over 300 installed commercial and industrial battery energy storage sites and, as of June 2026, more than 400 delivered sites with installed capacity exceeding 100 MWh. The company reported €17 million in revenue and over 100 employees at that time, and said it quadrupled revenue for a second consecutive year in 2025. It frames its position around European supply chains and vertical integration in a market where the EU installed a record 27 GWh of new battery storage in 2025 against an estimated need of roughly 750 GWh by 2030.

Vertical integration across the value chain: Cactos designs and manufactures its systems and battery modules in-house at its Kempele, Finland factory, develops the Cactos Spine control software itself, finances most deployed assets, and operates energy trading on customers' behalf. The company states this domestic manufacturing approach avoids reliance on third-country supply chains or remote-access risks. Its largest installed system is 14.2 MWh.

Technology

Cactos systems pair LiFePO4 battery modules and a proprietary Cactos battery management system with Cactos Spine, an in-house cloud platform that gathers real-time consumption, price and weather data to optimize charging and discharging around the clock and to enable automated participation in electricity markets. Functions include load shifting, peak shaving, storage of locally produced solar or wind energy, higher peak power without upgrading the grid connection, and backup power in the Cardo model. Earlier generations repurposed second-life Tesla EV battery packs; the company also produces first-life LiFePO4 modules in-house. Indoor units are rated IP20 for 10–35 °C operation, outdoor units IP54 or IP65 for −30 to 45 °C.

Go-to-market

Direct sales with remote product demonstrations and quote requests through the company website, supported by sales contacts in Finland and Estonia and offices in Helsinki and Amsterdam. Growth has also come through named commercial contracts and partnerships, including a cybersecurity collaboration with Huld and grid-scale project mandates.

Commercial and industrial energy users, including manufacturing and industrial facilities, logistics and transportation centers, EV and electric truck charging operators, agriculture and greenhouses, real estate investors, and other commercial and public properties; also grid-scale battery park operators. Customers range from family businesses to large enterprises. Named customers include Bloks Oy, taxi operator Menevä, logistics company Logitri and Rando Grid.

Geography

Headquartered in Helsinki, Finland, with a factory and R&D/production center in Kempele (Northern Ostrobothnia), an office in Amsterdam, the Netherlands, and sales coverage in Estonia. Systems have been delivered in Finland, Sweden, the Netherlands and Ukraine; electricity market features are currently available in Finland, with ancillary service market entry in Sweden announced in August 2026.

History

After founding in 2021, Cactos began prototyping and production in Muhos, Northern Ostrobothnia, launching its battery energy storage system during its first half-year of operations and building units of about 100 kWh from recycled Tesla EV batteries. A €2.5 million equity round with Superhero Capital and the founders was announced in late 2022 to expand the Muhos plant. In March 2023 it signed a deal worth over €1 million with logistics company Logitri, and in February 2023 launched the Cardo indoor model. The company raised over €26 million in January 2024 and moved from Muhos to Kempele, opening a new R&D and production center there in late 2024 alongside a next-generation product line. In 2025 it partnered with Huld on energy-sector cybersecurity, began selling electricity to customers, built electric truck charging infrastructure in Sweden, delivered the Rando Grid battery park in Kuhmoinen, and unveiled three new products from its Kempele factory in November. In 2026 it recorded first trades on Finland's congestion management flexibility market, signed its largest contract to date, raised €12.5 million, and entered Sweden's ancillary service markets.