Portable solar panels let you charge up your portable power station with energy from the sun. Here are CNET's favorites.
https://www.cnet.com/home/energy-and-utilities/best-portable-solar-panels/?utm_source=dlvr.it&utm_medium=blogger#ftag=CAD590a51e
https://www.cnet.com/home/energy-and-utilities/best-portable-solar-panels/?utm_source=dlvr.it&utm_medium=blogger#ftag=CAD590a51e