NEPOOL-GIS and New Hampshire GRECs: A Homeowner's Guide
NEPOOL-GIS (New England Power Pool Generation Information System) is the exclusive registry used to track and issue renewable energy certificates in the New England region, specifically for New Hampshire geothermal credits. Unlike the GATS system used in the mid-Atlantic, NEPOOL-GIS operates specifically for the ISO-NE balancing authority area, which means geothermal systems located in New Hampshire cannot utilize PJM-GATS and must instead navigate the unique registration and issuance protocols of the NEPOOL registry to monetize their thermal energy displacement.
The Role of NEPOOL-GIS in New England
NEPOOL-GIS serves as the central certificate tracking platform for all six New England states within the ISO-New England electrical grid region. It is responsible for creating, tracking, transferring, and ultimately retiring renewable energy certificates—referred to specifically as GIS Certificates—for both electricity-generating and thermal-energy-producing systems. For New Hampshire residential and commercial geothermal systems, NEPOOL-GIS issues thermal energy certificates that are classified as Class I RECs under the state's Renewable Portfolio Standard (RPS). These certificates represent the fossil fuel heating that was avoided by using a high-efficiency ground-source heat pump. Because ISO-NE is an independent system operator, the tracking rules in NEPOOL are designed specifically to accommodate the regional grid's constraints and state-specific legislative mandates, making it a highly specialized market for New Hampshire system owners.
Regional Grid Differences and Registry Choice
The tracking system used for your geothermal credits depends entirely on your grid territory and state of residence, rather than personal preference. New Hampshire is a critical part of the ISO-New England grid, while states like Maryland, Virginia, and Pennsylvania are members of the PJM Interconnection. These are two distinct and separate electrical grid regions, each with its own energy markets, regulatory oversight, and tracking registries. Because of this structural separation, credits issued in NEPOOL-GIS cannot be transferred to PJM-GATS, and vice versa. Each registry has developed its own software and reporting standards to meet the compliance needs of its respective state legislatures. This means that New Hampshire geothermal owners must adhere to the specific quarterly reporting cycles and registration formats unique to New England to ensure their credits are valid for sale to regional utilities.
NEPOOL Registration Requirements
Registering a system in NEPOOL-GIS requires a comprehensive package of system documentation, including detailed manufacturer specifications, borehole logs, total heating/cooling capacity, and the verified date of installation. Additionally, the system must receive formal state qualification as a Class I renewable resource from the New Hampshire Department of Energy before it can be entered into the GIS platform. While this registration process is similar in its basic principles to the mid-Atlantic systems, it follows NEPOOL-specific procedures, timelines, and reporting documentation that can be daunting for the average consumer. Emergent Energy manages every step of the NEPOOL-GIS registration on behalf of our New Hampshire clients, ensuring that all engineering and state-level data is submitted accurately to avoid delays in credit creation. Proper registration is the first step toward long-term revenue, and our expertise ensures you maximize your system's earning potential from day one.
Quarterly Issuance and Trading Cycles
NEPOOL-GIS operates on a quarterly issuance schedule that is strictly aligned with the ISO-NE trading calendar. This means certificates are not issued every month, but rather in four primary batches per year based on the reported thermal output of the registered geothermal systems. Once these certificates are issued, they are available to be sold to New England utilities and competitive energy suppliers who are legally required to meet their RPS obligations. The sale process involves a formal electronic transfer of certificates from your individual or aggregator GIS account to the utility buyer's account, where the credits are 'retired' and can no longer be sold. This quarterly rhythm requires careful market monitoring to ensure that credits are sold during the most advantageous trading windows. Emergent Energy tracks these quarterly cycles closely to ensure our clients' credits are moved efficiently and at the best available market prices.
Market Pricing and Strategic Performance
The NEPOOL and PJM-GATS markets serve distinctly different geographic regions and therefore have very different pricing dynamics. For example, while Maryland geothermal credits in the PJM-GATS market have historically commanded high prices near $87/MWh, New Hampshire credits in the NEPOOL system have averaged approximately $27/MWh. However, the New Hampshire market benefits from a smaller overall supply pool and steady demand from regional utilities who have limited options for Class I thermal credits. For homeowners, the most important takeaway is that your state law determines which registry you must use, and the regional market dynamics determine your price. Emergent Energy has the infrastructure to handle both NEPOOL and PJM systems, ensuring you get professional representation regardless of which grid territory you live in. For more state-specific details, please visit our /new-hampshire page or explore our /glossary for complete terminology on GIS certificates.
Class I Thermal Regulations in New Hampshire
New Hampshire's inclusion of geothermal heat pumps in the Class I Renewable Portfolio Standard is a testament to the state's commitment to thermal energy transition. Under the NH Code of Administrative Rules, geothermal systems must meet specific efficiency standards to qualify for NEPOOL-GIS certificates. This includes minimum COP requirements based on the AHRI (Air-Conditioning, Heating, and Refrigeration Institute) ratings. Our team evaluates your system's design to ensure it meets these rigorous state standards before we attempt the NEPOOL registration. By aligning your system with Class I requirements, you are contributing to New Hampshire's statewide goals of reducing carbon emissions from the heating and cooling sector. We help you demonstrate this compliance to the state and the GIS registry, turning your environmental commitment into a tangible financial asset.
Managing Seasonal Output in NEPOOL
Because NEPOOL-GIS issuance is quarterly, the seasonal variation in geothermal performance is more pronounced in your account balance than in monthly systems. In New Hampshire's cold winters, your heat pump works harder and displaces more fossil fuel energy, leading to a larger volume of credits in the first and fourth quarterly issuance cycles. Conversely, the cooling season in the second and third quarters may produce a different volume of thermal displacement credits depending on state-specific calculation methods. Emergent Energy's reporting tools help you understand these seasonal fluctuations, providing a clear picture of when your highest revenue periods will occur. This transparency allows for better financial planning and a deeper understanding of how your system interacts with the regional New England energy market.