Portable solar panels provide solar power for charging 12V batteries. Most are made up of two 12V solar modules that are hinged together so they can be folded together when not in use.
Hinged legs are attached to the back of the panels to allow them to be directed at the sun. Most have a solar regulator and battery cables attached.
The cables have clamps for connecting to a 12V battery which is then charged by solar power to provide power for small devices while travelling.
When choosing a Portable solar panel kit check that it is able to provide enough power for your needs. The solar panels should be big enough to generate enough power to fully recharge the battery in one day.