Using this solar panel is a breeze. First, find a spot with direct sunlight for maximum power generation. If you need more voltage or current, you can connect multiple panels in series or parallel. When it comes to connecting the panels, the back has easy - to - solder connections. After soldering, use epoxy to waterproof the back contacts. To create a portable power supply, pair it with a lithium polymer battery and our special charger. As for maintenance, keep the panel clean. Wipe it gently with a soft cloth if it gets dirty. And remember, store it in a dry place when not in use to extend its lifespan.