The Lacrosse satellite uses radar to map selected regions on Earth for military reconnaissance. The estimated output power of the radar alone is in the range of 10,000 to 20,000 watts. [Gunthers Space Page]

DirectC-7S- Communications satellite has a spacecraft power of 13,000 watts [SpaceNewsFeed]

NSS-8 'News Skies' military satellite - 14,000 watts [SatNews.com]

The International Space Station uses solar panels that generate 100,000 watts [Science@NASA]