Maryland's Utility RELIEF Act: What HB 1532 Means for Renters and Deregulated Customers

By PlugInSolarUS Editorial Team · Published 2026-04-15 · Updated May 12, 2026 · 7 min read

Governor Wes Moore signed Maryland's HB 1532 (Utility RELIEF Act) into law on May 12, 2026, making Maryland the 5th US state to legalize plug-in solar. Here's what the new law means for Maryland's 370,000 deregulated electricity customers — and why the state's unique market structure makes plug-in solar especially powerful here.

Maryland's Utility RELIEF Act: What HB 1532 Means for Renters and Deregulated Customers

Maryland is now the 5th US state to explicitly legalize plug-in solar. Governor Wes Moore signed the Utility RELIEF Act (HB 1532) into law on May 12, 2026 (Chapter 353), completing a legislative journey that began with the bill's introduction as part of a broader package of utility affordability measures. Maryland's plug-in solar provisions are among the most detailed of any state law enacted to date.

Maryland's Unique Market Context

Maryland is one of a handful of US states with a fully deregulated residential electricity market. Unlike most states where a single utility sets rates, Maryland residents can choose their electricity supplier from dozens of competing providers. This creates a distinctive dynamic for plug-in solar:

• Approximately 370,000 Maryland households are enrolled with competitive electricity suppliers, many on variable-rate contracts that can spike significantly in winter and summer.
• Maryland's average residential electricity rate is approximately 15.2¢/kWh — moderate by national standards, but variable-rate customers frequently pay 20–30¢/kWh during peak periods.
• For deregulated customers, plug-in solar doesn't just reduce consumption — it provides a hedge against the price volatility that comes with competitive supplier contracts.

This is the context that makes HB 1532 particularly significant for Maryland renters and apartment dwellers. The bill was introduced as part of Governor Moore's broader utility affordability agenda, responding to constituent pressure over rising electricity costs across the state.

What HB 1532 Actually Does

The Utility RELIEF Act's plug-in solar provisions create a clear, tiered framework for residential installation:

• All retail electricity customers — renters and homeowners — may install systems up to 1,200W.
• Systems ≤391W are exempt from UL certification requirements, making entry-level balcony panels accessible without the cost premium of certified equipment.
• Systems >391W up to 1,200W must use UL-certified inverters and comply with the state's interconnection notification process.
• The bill explicitly references UL 3700 as the applicable safety standard for plug-in grid-interactive power conversion equipment.
• Provisions apply to renters and homeowners alike — landlords cannot prohibit qualifying installations.
• If signed, the rules take effect October 1, 2026.

The Maryland Economics

At Maryland's average rate of 15.2¢/kWh, the financial case for plug-in solar is solid, though less dramatic than in high-rate states like Maine or Massachusetts. The numbers for a typical 800W system:

For deregulated customers on variable-rate contracts who pay 20–25¢/kWh during peak months, the payback period shrinks to 5–6 years. Use our Savings Calculator to estimate your specific savings based on your zip code and current rate.

How Maryland Compares to Other Enacted and Near-Enacted States

What the ≤391W Exemption Means in Practice

Maryland's decision to exempt systems at or below 391W from UL certification requirements is a notable policy choice. Most entry-level balcony solar kits sold in the US today are in the 300–400W range — meaning a large share of the consumer market would qualify for the simplified tier. This lowers the effective cost of entry for renters and apartment dwellers who want to start small without paying the premium for fully certified equipment.

The 391W threshold appears to align with the output capacity of a single standard residential solar panel, suggesting the intent is to allow single-panel setups as a frictionless entry point. Two-panel or larger systems (typically 600–1,200W) fall under the standard UL certification requirement.

What This Means for Maryland Residents

• Renters: You now have a clear legal right to install a plug-in solar system up to 1,200W. Systems at or below 391W require no UL certification — a single standard panel qualifies. Larger systems require UL-certified equipment and utility notification. The law is in effect as of May 12, 2026.
• Homeowners: Same provisions apply. Systems up to 1,200W can be installed without an interconnection permit. No BGE or Pepco approval required.
• Deregulated customers: If you're on a variable-rate competitive supplier contract, plug-in solar provides a direct hedge against price spikes. Every kWh you generate is a kWh you don't buy at whatever rate your supplier charges that month.
• Property managers and landlords: Review your lease addendum policies now. Tenants in Maryland have the legal right to install qualifying systems. Having a clear policy in place will prevent disputes.

What Comes Next

With the law now in effect, Maryland residents can begin planning their plug-in solar installations immediately. The Maryland Public Service Commission may issue additional implementing guidance, but the core provisions — including the right to install without utility approval — are already law. BGE and Pepco customers should note that utility-specific interconnection procedures may take some time to fully align with the new statute.

Maryland joins Utah, Maine, Virginia, and Colorado as the 5th US state to enact plug-in solar legislation. Connecticut (HB 5340) and New Hampshire (SB 540) are both awaiting governor signatures as of May 2026. Vermont (S. 202) is in the final stage of House concurrence on a Senate tenant notice amendment before going to Governor Scott.

Track the status of all 50 states on our State Tracker. If you live in Maryland, check your readiness now — the law is already in effect.

Further Reading

• Maryland State Detail Page — HB 1532 full summary and timeline
• Breaking: Maine Becomes Second State to Legalize Plug-In Solar
• Plug-In Solar Legislation Roundup: What's Moving in 2026
• Savings Calculator — Estimate your annual savings in Maryland

Sources

• Maryland HB 1532 — Maryland MGA
• PV Magazine: Bills containing plug-in solar provisions pass in Maryland and Colorado
• EIA Maryland Electricity Data