Seac taps Sunotec to build battery storage of up to 230 MWh in Germany

The Seac Group has commissioned Sunotec Germany to construct the first section of a 230 MWh storage facility in Germany. The companies announced on Monday that the facility will be realized in four total construction phases, depending on market conditions as well as regulatory and grid-side requirements.

The first phase involves the installation of 20 MWh of capacity. The second phase, also comprising 20 MWh, is officially scheduled to be awarded in the first quarter of this year. Sunotec is optimistic that the existing cooperation agreement between the companies will be extended to cover this expansion.

The third construction phase of the battery storage system envisages the addition of a further 30 MWh of capacity, subject to a grid connection agreement and a final evaluation. The decision on this phase is expected in the second quarter of 2026.

According to the announcement, the fourth construction phase depends on the results of a grid compatibility assessment. If approved, up to 160 MWh of additional battery storage capacity could be added under current plans. This final step is targeted for completion by 2028.

Sunotec Germany described the commission from Seac as an important milestone in the large-scale battery storage sector. Building on its experience in the development, construction, and operation of photovoltaic power plants, the company stated that battery storage has developed into a central pillar within Sunotec’s integrated energy platform.

The company has expanded its competencies for battery storage systems along the entire value chain. In Bulgaria, Sunotec is currently the largest developer and operator of large-scale battery storage. The expansion of its storage activities into Germany represents a consistent next step within its European growth strategy, Sunotec added.

From pv magazine Germany.