The Köthen Solar Park is a photovoltaic power station in Köthen, Germany. Köthen Solar Park has a capacity of 45 MWp and an annual output of 42 GWh. The solar park is developed built by RGE Energy.

The photovoltaic power station project is built on a former military airfield in Köthen on 116 hectares (290 acres). The project is the largest solar power plant in Saxony-Anhalt and the world's largest with string inverters. The project is equipped 205.000 crystalline photovoltaic modules of BP Solar. The total investment in the project was around €133 millions. The solar park was connected to the grid in 2009.