The Maryland GREC Program Explained: Eligibility, Pricing, and How to Enroll
Maryland's Geothermal Renewable Energy Credit (GREC) program was created by HB 1007 (2021), a landmark piece of legislation that added a dedicated GREC 'carve-out' to the state's Renewable Portfolio Standard (RPS). Systems installed on or after January 1, 2023, earn specialized credits that are currently worth $87/MWh in 2025, which is significantly higher than the standard Tier 1 REC. These credits are tracked through the PJM-GATS registry and sold to Maryland utilities who are legally required to purchase them to meet their annual green energy compliance obligations, providing a robust and stable revenue stream for MD residents.
The Evolution of the MD RPS and HB 1007
Maryland's GREC program traces back to the state's Renewable Portfolio Standard, which was amended by HB 1007 in 2021 to include a dedicated geothermal carve-out for the first time. This specific carve-out requires Maryland utilities - including BGE, Pepco, Delmarva Power, and Potomac Edison - to procure a specific and increasing percentage of their renewable energy specifically from geothermal heat pump sources. The legislation created a separate, specialized market for GRECs, distinct from solar and wind credits, ensuring there is dedicated demand regardless of how many solar panels are installed in the state. This protection has led to some of the highest credit prices in the country, as the supply of geothermal systems is currently much lower than the utility demand mandated by the state. This supply-demand imbalance directly benefits the system owner through higher market clearing prices for their credits. For more history, check out our /maryland state page.
Eligibility Requirements in Maryland
To participate in the Maryland GREC market, systems must meet several strict eligibility requirements: the geothermal heat pump must be installed at a physical address within Maryland, it must have an ENERGY STAR certification if it is a residential system, and the owner must provide proper documentation including a final installation invoice and detailed equipment specifications. Systems installed on or after January 1, 2023, qualify for the high-value dedicated GREC carve-out. Older systems installed before that date may still be eligible to earn Tier 1 RECs, but at a lower market price. Both residential and commercial systems are welcome in the program, though commercial systems over a certain capacity may require dedicated thermal metering. Our team at Emergent Energy verifies these requirements during our initial /evaluate phase to ensure no time is wasted on ineligible applications and that homeowners understand exactly which tier their system falls into.
How Maryland GRECs are Calculated
Maryland GRECs are calculated using a state-approved standard formula: (system tons x 12,000 BTU/hr x 8,760 hours x efficiency factor) / 3,412,000 x fuel displacement multiplier. A typical 4-ton system with a COP of 3.5 that is replacing a natural gas or electric resistance system generates approximately 43 to 50 GRECs per year, though specific calculations can vary. Crucially, systems replacing existing fuel oil or propane setups receive a 1.4x multiplier in Maryland, generating significantly more credits than those replacing standard natural gas (which uses a 1.0x baseline). This multiplier reflects the state's policy goal of incentivizing the replacement of the most carbon-intensive heating fuels. Because these calculations are complex and based on specific ASHRAE standards, Emergent Energy uses proprietary software to ensure every single BTU is accounted for in your registration. You can explore these variables in our /calculator.
Pricing Dynamics and the ACP Ceiling
Maryland GRECs traded at a remarkably stable $87/MWh throughout 2024 and early 2025. This pricing is anchored by the Alternative Compliance Payment (ACP) ceiling - the penalty rate utilities must pay the state if they fail to procure enough GRECs from the market. The ACP for the geothermal carve-out is tiered, starting at $100 per credit and gradually stepping down in future years toward $65. Because GRECs currently trade at a slight discount to the ACP, utilities have a strong financial incentive to buy actual credits from system owners through aggregators like Emergent Energy rather than paying the penalty. This dynamic creates a very predictable pricing environment for system owners, allowing for highly accurate long-term financial modeling. Our aggregation strategy involves multi-year contracts when possible to lock in these high rates for our clients, providing security against future market fluctuations. See our /faq for more on market pricing.
The Emergent Energy Managed Process in MD
Emergent Energy handles the complete Maryland GREC enrollment process end-to-end: this includes documentation collection, the formal Maryland Public Service Commission (PSC) certification application, the PJM-GATS registration, and ongoing monthly credit management and sales. The entire process from your first click to the first credit issuance takes 6-12 weeks on average. There are no upfront costs or hidden fees - our business model is based on a transparent percentage of the GREC revenue generated. We basically act as your expert agent in the energy market, handling the bureaucratic paperwork so you can simply enjoy the savings and the income. If you are an installer in the Maryland area, we recommend checking our /for-installers page to see how we can provide this service to your customers as a value-add during your sales process. This turnkey approach has made us the leading aggregator in the state.
Environmental Impact and Fleet Aggregation
By participating in the Maryland GREC program, you are doing more than just earning money; you are providing tangible evidence of decarbonization that helps the state reach its goal of 100% clean energy by 2045. Each GREC represents the displacement of fossil fuels by high-efficiency thermal energy, and by aggregating your credits into our larger 'fleet,' you are helping to build a more resilient and decentralized energy grid. We provide our clients with reports on their environmental contribution, showing the equivalent of trees planted or cars removed from the road based on their GREC generation. This data is increasingly valuable for commercial clients who have ESG (Environmental, Social, and Governance) reporting requirements. For a deeper dive into the science of these offsets, visit our /glossary or check out our full list of supported /states to see how Maryland compares to neighbors like Virginia and Pennsylvania.
Next Steps for Maryland Homeowners
If you have installed a geothermal system in Maryland within the last two years, or are planning to install one soon, now is the time to start the registration process to ensure you capture every possible credit. The MD PSC can be strict with deadlines, and retroactively claiming credits for past years is often limited. Start by visiting our /evaluate tool to upload your contract or invoice, and our team will provide a free estimate of your system's annual GREC value. Once you sign our simple service agreement, we take over the rest, interface with your installer if necessary, and get your system generating revenue as quickly as possible. Don't leave thousands of dollars on the table - Maryland has one of the best geothermal incentive programs in the world, and Emergent Energy is here to make sure you get your fair share of it.