How much time does a simulation take?

For planning simulations, typically a few minutes.

For OCPP simulations it will depend on the backoffice and how fast you can accelerate the operation. Depending on your backoffice setup accelerated operation may require some adaptations since the OCPP protocol is only designed for real-time use. (e.g. 1kWh will be delivered in under 1h in accelerated mode, but if the backoffice cross checks this it could cause a warning.)

In real time mode it will take as long as you intend to simulate.