- Business
- Rentunder Holding AB is a Swedish environmental technology company that specializes in the design, development, manufacture, and commercialization of automated, in-water mechanical boat hull cleaning systems. Founded in 2012 and headquartered in Östhammar, Sweden, the company provides eco-friendly marine maintenance solutions marketed under the Drive-in Boatwash brand, serving as a non-toxic alternative to biocidal and copper-based antifouling marine paints. Its comprehensive product and service portfolio includes the BigWash series, comprising stationary, professional-grade in-water wash stations engineered for marinas, ports, and yacht clubs to accommodate vessels up to 16 meters in length; the MiniWash series, featuring mobile, trailer-mounted hull cleaning units designed for powerboats up to 8.5 meters; integrated wastewater containment and filtration systems that capture dislodged organic growth, microplastics, and heavy metal residues for environmentally compliant disposal; and technical support, installation, turnkey site commissioning, replacement brush supplies, and maintenance services.
The company primarily serves municipal harbor authorities, commercial marina operators, yacht clubs, boat rental fleets, and private marine service providers across Sweden, the broader Nordic region, Continental Europe, North America, and Asia. Its proprietary mechanical cleaning technology utilizes rotating brushes to remove marine growth in minutes without damaging hull gelcoats, significantly reducing hydrodynamic drag, lowering vessel fuel consumption, and preventing chemical discharge into aquatic ecosystems.
In recent developments, Rentunder Holding AB has transitioned its commercial strategy toward a partner- and distributor-driven expansion model to scale international sales while controlling internal operating costs. The company has strengthened strategic distribution partnerships, including its exclusive arrangement with G&G Boatwash in France and Belgium, to establish regional reference installations and accelerate adoption across key European boating markets. Concurrently, the company has executed comprehensive cost-rationalization and operational restructuring initiatives to optimize liquidity, align overhead with market demand, and safeguard its capital base. Rentunder also continues to advance product engineering, developing modular, complementary wash unit configurations tailored to diverse international marina infrastructures and growing regulatory bans on toxic antifouling paints.