This is because at home you usually can take advantage of the regular electricity rate 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 benefit from the opportunity to use advantageous energy rates, such as charging during off-peak hours or purchasing a special electricity rate for electric vehicles. This can help you further reduce the costs of charging.

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

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