Solar Panel Setup for Water Pre-Filter

I need consultation and instructions to safely connect a water pre-filter powered by three AA batteries to a solar panel. I'm looking for guidance on selecting compatible solar equipment and ensuring a safe setup.

Key Requirements:
- Instructions for safe installation
- Guidance on solar panel selection and compatibility
- Ensuring safety of the entire setup

Ideal Skills and Experience:
- Experience with solar panel installations
- Knowledge of battery-operated devices
- Strong focus on safety in electrical setups