Dear Gerardo,
NOTE: This reply was updated from the original on 6/3/2020.
Yes, it is possible to model a retail electricity rate structure with tiers. In the attached example, I modeled a 2 kW (DC) photovoltaic system that helps meet a residential electric load of about 6,000 kWh/year with a 2 kW (AC) annual peak load.
On the Electricity Rates page, you can see that the electricity rate structure has three tiers:
There is only one TOU period, so I set the period on the Weekday and Weekend schedules to 1 with my mouse by selecting the entire schedule and typing a "1":
You can run a simulation and verify the results:
Best regards,
Paul.