German energy group RWE AG (<a href="https://www.boerse-frankfurt.de/equity/rwe-ag-st" target="_blank">ETR:RWE</a>) today said it has signed power purchase agreements (PPAs) with Microsoft Corp (<a href="https://www.nasdaq.com/market-activity/stocks/msft" target="_blank">NASDAQ:MSFT</a>), under which the US technology giant will buy electricity from two new RWE wind farms in Texas totalling 446 MW.