German logistics company Deutsche Post AG (<a href="https://www.boerse-frankfurt.de/equity/deutsche-post-ag" target="_blank">ETR:DHL</a>), trading as DHL Group, has agreed to buy about 104 GWh of wind power annually from a unit of energy group RWE AG (<a href="https://www.boerse-frankfurt.de/equity/rwe-ag-st" target="_blank">ETR:RWE</a>).