Roborock has released a new feature to celebrate World Earth Day, Off-Peak Charging. The tool lets you set your vacuum to only charge during off-peak hours, however those may be defined by your energy provider. Roborock suggests that this feature can save you money on your energy bills and reduce your CO2 impact.
https://www.notebookcheck.net/Roborock-launches-cost-saving-Off-Peak-Charging-feature.615543.0.html