Example: Playstation 4
Assuming a daily playing time of 3 hours, the PS4 consumes 435 watts or 0.435 kWh per day. Extrapolated to a year, this corresponds to a energy of 158,775 kWh. If you multiply the annual consumption by 30 rappen per kWh, the electricity costs amount to about 45 Swiss francs annually.
Petar :D