The solar arrays on NASA's InSight Mars lander were deployed as part of testing conducted Jan. 23, 2018, at Lockheed Martin Space in Littleton, Colorado. Engineers and technicians evaluated the solar arrays and performed an illumination test to confirm that the solar cells were collecting power. The launch window for InSight opens May 5, 2018.
NASA
<a rel="nofollow" class="external free" href="https://photojournal.jpl.nasa.gov/gallery/snt?subselect=Mission%3AInSight%3A">https://photojournal.jpl.nasa.gov/gallery/snt?subselect=Mission%3AInSight%3A</a>