A solar panel battery charger harnesses sunlight and converts it into electrical energy. This transformation is achieved through photovoltaic cells within the solar panels. The generated electricity is then used for battery charging from solar panels, providing a sustainable and eco-friendly power source that can be utilized for various applications such as powering electronic devices, maintaining battery health in vehicles, or supplying energy to remote locations.

To charge a 12V battery, the size of the solar panel typically depends on the battery's capacity and usage. A common recommendation is to use a 100-watt solar panel like the Anker SOLIX PS100 portable solar panel charging a battery. This can produce around 5-6 amps per hour, charging a medium-sized battery efficiently under good sunlight conditions. However, for faster charging or larger battery capacities, more powerful panels or multiple panels connected in series may be required.

The time to charge a 12V battery with a solar panel depends on the panel's wattage, the battery's capacity, and sunlight conditions. For example, using a 100-watt solar panel in optimal sunlight can take approximately 20 hours to fully charge a 12V battery with a capacity of 100Ah. However, when using 200W solar panels to charge a 12V battery, it could take around 8-10 hours to fully charge the battery.