PA AEPS Act 213 Explained: The Legal Foundation of Pennsylvania's Tier II AEC Market

Pennsylvania's Tier II AEC market exists because of one statute: Act 213 of 2004. Understanding what that law requires — and how Act 114 of 2020 and the pending PRESS Act reshape it — is essential context for any generator, EGS, or building owner participating in the market.

What Act 213 Requires

Act 213 of 2004 — the Alternative Energy Portfolio Standards Act — requires every EDC and licensed EGS selling retail electricity in Pennsylvania to source a minimum percentage from qualifying alternative energy resources. The terminal Tier II obligation is 10% of retail load. Compliance is met by (1) owning qualifying facilities, (2) purchasing electricity from qualifying facilities, or (3) purchasing AECs separately. AEC trading is how most EGSs comply.

Tier I vs. Tier II: The Two-Class System

• Tier I — premium class — solar PV, wind, low-impact hydro, biomass, coal bed methane.
• Tier II — catch-all class — waste coal, coal mine methane, distributed generation under 5 MW, demand-side management, demand response, large-scale hydro, municipal solid waste, wood pulping byproducts, useful thermal energy, IGCC.

The DSM and useful thermal energy provisions are the gateway for LED retrofits, HVAC upgrades, VFDs, CHP, and geothermal heat pump projects.

Act 114 of 2020: The In-State Sourcing Requirement

Before Act 114, Tier II compliance could be met with AECs from anywhere in the 13-state PJM region. Act 114 restricted this to Pennsylvania-certified generators only, effective CY 2021. Regional surplus became in-state scarcity. Price jumped from $2.40/AEC in 2019–20 to $26.92 in 2024–25 — see current AEC market prices. This single amendment is the primary driver of the 9-year price appreciation.

The AEC Credit Lifecycle

One AEC is created when a qualified facility generates 1,000 kWh from an eligible resource. The generator or authorized aggregator posts data to PJM-GATS, which issues a unique certificate number. AECs are eligible for compliance in the generation year and the following two energy years (June 1–May 31). Once retired, a certificate is permanently closed — no AEC can be claimed more than once.

PennAEPS: The Program Administrator

InClime, Inc. serves as the PA PUC's AEC administrator, operating the PennAEPS portal. PennAEPS handles facility certification applications, compliance reporting for EGSs, publishes historical pricing data, and maintains the authorized aggregator/broker directory. Emergent Energy is registered as an authorized aggregator and broker — see how to register for the project owner workflow.

The Alternative Compliance Payment Mechanism

$45.00/AEC is the penalty paid to the PA PUC when EGSs fail to procure sufficient Tier II credits. ACP payments go to the Commonwealth's Clean Energy Program Fund. The ACP functions as a soft price ceiling — no rational buyer pays more than $45.00 per AEC when the penalty alternative exists. The $18.08 spread between the $26.92 market and $45.00 ACP represents 67% of headroom.

What the PRESS Act Would Change

HB 501 (PRESS Act) — passed House Environment Committee June 2025, pending Senate — would restructure the program in four key ways:

• (1) Tier II obligation drops to 6% in EY 2027, then steps back to 10% by 2035.
• (2) Waste coal, MSW, and IGCC move from Tier II to a new Tier III.
• (3) Geothermal heat pumps move from Tier II to Tier I.
• (4) New ACP rates: Tier II $35, Tier III $15.

Full impact analysis is covered in the PRESS legislation analysis.

Frequently Asked Questions

Q: Is participation in the PA AEC program mandatory for generators?

No — participation is entirely voluntary. However unregistered projects generate zero AEC revenue, which at current market prices represents significant unrealized income for qualifying project owners.

Q: Can a generator sell AECs and also claim renewable energy or carbon credits for the same generation?

No. Selling Tier II AECs transfers all Environmental Attributes and Reporting Rights to the buyer. The seller cannot make any renewable energy claim for the electricity behind sold AECs. This is enforced contractually in all AEC sale agreements.