APS Off-Peak Hours are the following periods of time:
- All weekends;
- All weekdays, except during 4PM to 7PM;
- Certain holidays designated by APS.
APS On-Peak Hours are Monday through Friday from 4PM to 7PM. Generally speaking, APS Off-Peak Hours are all times that are not On-Peak. Usage charges are lower during Off-Peak times and higher during On-Peak times.