Not on the charger. Scheduled charging and solar charging are mutually exclusive on a Peblar charger: you choose one of the two. You can still use a charging schedule in your car while the charger is in solar mode.
Setting a charging schedule
Open the Smart Charging tab in the web interface and click Edit Schedule. Select or deselect each hour as you like. Orange fields are charging hours, white fields are hours in which the charger does not charge. Changes take effect immediately.