Maryland Public Service Commission and Solar Energy Oversight

The Maryland Public Service Commission (PSC) functions as the primary state regulatory body governing electric utilities, interconnection approvals, and solar energy program administration within Maryland. Its decisions affect every stage of a solar project's lifecycle — from utility interconnection to rate structures and renewable energy credit markets. Understanding the PSC's authority is essential for anyone navigating Maryland's solar regulatory landscape, whether for a residential rooftop system or a utility-scale generation facility.

Definition and scope

The Maryland Public Service Commission is a state agency established under Maryland Code, Public Utilities Article, with jurisdiction over investor-owned electric utilities, natural gas companies, and telecommunications providers operating within the state. For solar energy, the PSC's regulatory mandate encompasses:

Interconnection standards — oversight of the technical and procedural requirements utilities must follow when connecting distributed solar systems to the grid
Net metering programs — administration of the rate frameworks under which solar generators receive credit for exported electricity (see Maryland Net Metering Explained)
Renewable Portfolio Standard (RPS) — enforcement of the mandate requiring Maryland utilities to source a defined percentage of electricity from renewable sources, including Tier 1 solar (Maryland Renewable Energy Portfolio Standard)
Solar Renewable Energy Credit (SREC) markets — oversight of the compliance market in which utilities purchase SRECs to meet the solar carve-out under the RPS (Maryland Solar Renewable Energy Credits)
Rate case proceedings — formal adjudication of utility tariff changes that affect solar customers' billing structures

Scope coverage and limitations: The PSC's authority applies to regulated investor-owned utilities such as Baltimore Gas and Electric (BGE), Pepco, Delmarva Power, and Potomac Edison operating in Maryland. The PSC does not have direct jurisdiction over municipal utilities, rural electric cooperatives, or federally regulated transmission infrastructure managed by PJM Interconnection. Federal-level matters — including the Federal Investment Tax Credit administered under IRS rules — fall outside PSC jurisdiction entirely. Equipment-level safety standards are governed by the National Electrical Code (NEC) and enforced through local building departments, not the PSC. For a broader view of the regulatory ecosystem, the regulatory context for Maryland solar energy systems covers adjacent frameworks.

How it works

The PSC operates through a commission structure of 5 members appointed by the Governor and confirmed by the Maryland Senate, each serving 6-year terms (Maryland Code, Public Utilities Article §2-101). Its solar-related functions flow through two distinct procedural tracks:

Administrative rulemaking governs the ongoing structure of programs like net metering and interconnection. Utilities file tariff sheets and program modifications; the PSC reviews, holds public comment periods, and issues orders. Interconnection procedures for systems under 10 kW, systems between 10 kW and 2 MW, and systems above 2 MW each follow separate procedural tracks with different timelines and technical study requirements.

Case adjudication handles individual disputes — such as a utility's denial of an interconnection application or a disagreement over SREC compliance obligations. Parties may file complaints, receive formal hearings before a Public Utility Law Judge, and appeal PSC decisions to the Maryland Court of Special Appeals.

The how Maryland solar energy systems work conceptual overview provides context on where PSC-regulated interconnection and metering fit within the full system architecture. For permitting steps handled at the local level rather than the PSC, the index maps the full subject hierarchy.

Common scenarios

Scenario 1 — Interconnection application review: A homeowner installs a 8 kW rooftop photovoltaic system. The installer submits an interconnection application to BGE under the PSC's simplified interconnection procedures. BGE has 15 business days to complete the technical review under Maryland's adopted interconnection standards. The PSC may receive a complaint if BGE fails to meet that deadline or imposes unreasonable technical requirements.

Scenario 2 — Net metering rate dispute: A commercial solar customer disputes how their utility calculated the net metering credit rate on their monthly bill. The PSC's tariff orders set the methodological framework; a formal complaint can be filed if the utility's calculation deviates from the approved tariff.

Scenario 3 — RPS compliance shortfall: A regulated utility fails to acquire sufficient Tier 1 solar SRECs to meet its annual solar carve-out obligation. The PSC assesses an alternative compliance payment (ACP) — a penalty per MWh of shortfall — which is set by statute and adjusted periodically by PSC order.

Scenario 4 — Community solar subscription programs: The PSC regulates how utilities structure and administer community solar billing credits for subscribers (Maryland Community Solar Programs). Program modifications require PSC approval before implementation.

Decision boundaries

Two regulatory boundaries are frequently misunderstood in Maryland solar projects:

PSC jurisdiction vs. local permitting jurisdiction: The PSC governs utility-side approvals (interconnection, metering, rate credit). Local building departments govern physical installation permits, structural inspections, and electrical code compliance under NEC Article 690. A solar project requires both tracks to be completed independently — PSC interconnection approval does not substitute for a local electrical permit, and a passed local inspection does not authorize energization without utility interconnection approval.

Investor-owned utility customers vs. cooperative/municipal customers: Customers of the Southern Maryland Electric Cooperative (SMECO) or municipal systems such as Easton Utilities operate under different regulatory frameworks. SMECO members interact with cooperative-specific interconnection and net metering policies, which are not set by the PSC. Customers in those service territories should contact their specific utility for applicable rules.

Maryland's solar carve-out under the RPS required utilities to source 14.5% of retail electricity from solar by 2030 (Maryland Code, Public Utilities Article §7-703), which directly drives the SREC compliance market the PSC administers. Understanding whether a given issue falls under PSC authority, a local jurisdiction, or a federal agency is the first classification step for any solar regulatory question in Maryland.

References

📜 3 regulatory citations referenced · ✅ Citations verified Feb 25, 2026 · View update log

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