To make a rough estimate of the payback period, you can consider the following aspects:

1. Investment: The total cost of the charging station, including purchase, installation, and any additional costs such as network reinforcement and cabling.
   
   

2. Charging Behavior: The expected charging behavior at the station, including the number of charging sessions per day/week, the average charging time, and the energy consumption per session.
   
   

3. Rates: The energy rates applicable to charging electric vehicles, including the cost per kilowatt-hour (kWh) and any subscription or service fees.
   
   

4. Power Return: If you have solar panels and return excess energy to the electricity grid, this can shorten the payback period of the charging station, as you can use the generated solar energy to charge your car.
   
   

5. Subsidies and tax benefits: Possible subsidies or tax benefits applicable to the purchase and installation of the charging station, such as the Subsidieregeling Emissieloze Bedrijfsauto’s (SEBA) and the tax deductibility of investments.

It is important to note that the payback period is highly dependent on the individual situation and its calculation can be complex. It is advisable to conduct a detailed cost-benefit analysis based on your specific circumstances to get a realistic estimate of the payback period of the charging station.

In addition, it is useful to consider the long-term benefits of a charging station, such as reducing dependence on fossil fuels, lowering the maintenance costs of electric vehicles, and increasing the value of the home or business premises.