It is not possible to designate a specific location or charging network as the absolute cheapest option, because prices can constantly change and depend on individual circumstances.

However, here are some tips you can follow to find the cheapest charging option:

1. Compare charging networks: Different charging networks apply different rates. It is worthwhile to compare the prices and terms of different charging networks to see which offers the most favorable rates.
   
   

2. Look for subscriptions and offers: Some charging networks offer subscriptions or have special offers with lower rates. By checking subscriptions and offers, you might benefit from lower charging costs.
   
   

3. Consider home charging: Charging at home is often cheaper than charging at public charging stations. If you have the option to install a charging station at home, it can be a cost-effective option in the long run.
   
   

4. Plan smartly: Some charging networks have dynamic rates based on demand and the time of charging. By planning your charging sessions during periods with lower rates, you might save on costs.

It is important to remember that price is not the only factor to consider when choosing a charging option. Reliability, availability of charging points, and charging speed are also important considerations. Therefore, it is advisable to find a balance between cost and other factors when choosing a charging option.