The number of solar panels you need to power a charging station depends on several factors, such as the capacity of the solar panels, the energy consumption of the charging station, and the desired charging time. Here are some steps to make a rough estimate of the number of solar panels you need:

1. Determine the energy consumption of the charging station: Check the specifications of the charging station to find out the capacity or energy consumption per hour. This is often expressed in kilowatt-hour (kWh).

2. Calculate the required energy: Multiply the energy consumption of the charging station by the number of hours you want to charge to get an estimate of the total energy requirement.

3. Determine the capacity of the solar panels: Solar panels have a specific capacity expressed in watt-peak (Wp). This indicates how much electrical power they can produce under ideal conditions.

4. Calculate the number of solar panels: Divide the required energy by the capacity of the solar panels to get a rough estimate of the number of solar panels you need.

Keep in mind that this is a rough estimate and you may want to install more solar panels to compensate for variables such as fewer sun hours on certain days or seasons, and to potentially feed excess energy back to the power grid or store it in a battery system.

Additionally, it is important to consider the available space on your roof or the location where you want to install the solar panels, as well as any restrictions or regulations from local authorities.

It is advisable to consult a professional solar panel installer to get a detailed evaluation based on your specific situation.