The Q3 Quarterly Adjustment to the Tier I AEC credit requirement has been published and can be found at the Electricity Suppliers portion of the PennAEPS website. The Quarterly Adjustments for Energy Year 2021 are:
| Quarter | Base Tier I | Solar | Base Tier I Excluding Solar | Tier 1 Quarterly Adjustment | Adjusted Tier I (Excluding Solar) | Tier II |
| 3 | 8.0% | 0.5000% | 7.5000% | 0.394281% | 7.894281% | 10.00% |
| 2 | 8.0% | 0.5000% | 7.5000% | 0.348938% | 7.848938% | 10.00% |
| 1 | 8.0% | 0.5000% | 7.5000% | 0.288452% | 7.788452% | 10.00% |