This is because at home you can usually use the regular electricity tariff that you pay for your household electricity consumption. The electricity rate at home is often lower than the rate charged at public charging stations.

Additionally, when charging at home, you can also take advantage of the opportunity to use favorable energy rates, such as charging during off-peak hours or purchasing a special electricity rate for electric vehicles. This can help further reduce your charging costs.

At public charging stations, additional costs may be incurred, such as parking fees or costs per kilowatt-hour (kWh) that may be higher than what you pay at home. Moreover, some charging station operators may charge service fees or subscription costs.

It is important to note that the exact costs depend on your specific electricity tariffs, the pricing structure of the charging stations in your region, and your charging behavior. Therefore, it can be useful to make a cost comparison based on your specific situation to determine which option is most advantageous for you.