German operations and maintenance specialist 4:energy O&M has marked its fifth anniversary by expanding from solar into wind. The Prenzlau-based firm, founded in 2021, has taken on two wind farms totalling 46 MW alongside an engineering mandate for 2,000 EV charging points.
The company began as a five-person team focused on technical operations management for ground-mounted solar plants in Germany. It now employs around 40 people across three sites in Mayen, Dresden and Prenzlau, and manages more than 500 MW of solar under technical O&M, plus 110 kV substations and transformer stations for EV charging parks.
At the turn of 2026 the firm broadened its commercial O&M services with a new team in Dresden. It then signed a business management contract for a 28 MW wind farm in Lower Saxony and took on commercial operations for an 18 MW wind farm in Schleswig-Holstein, crossing 500 MW under management across more than 100 special-purpose vehicles in May. Management describes a growth path toward roughly 1 GW.
The company holds ISO 9001 and ISO 27001 certifications and has been audited under Germany’s KRITIS critical-infrastructure rules by the Federal Office for Information Security. Managing director Anja Spannaus framed the anniversary as the right moment to build on the firm’s growth.
The move illustrates how O&M and asset-management providers in Germany are broadening from single-technology roots into mixed renewable and grid-infrastructure portfolios, a shift relevant across the wider Baltic market as operating fleets age and diversify.
