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Hosting Capacity Tool Access the Map

The map shows the distribution grid’s available hosting capacity to help guide customers and developers on installation placement, ultimately saving time and money. By indicating the amount of resources that can potentially be connected, the tool helps ensure safety and reliability as Dominion Energy focuses on limiting voltage and thermal issues.

The analytic capabilities will evolve and improve as more intelligent grid devices and smart meters are deployed and additional grid information becomes available. Today, this map primarily benefits larger-scale solar customers and developers. Dominion Energy plans to provide a similar tool for smaller solar installations and residential customers in the near future.

The Hosting Capacity Tool is part of the company's Grid Transformation Plan – a 10-year plan to transform Virginia's energy grid and give customers more ways to save money, more reliable service, and more access to renewable energy.

Frequently Asked Questions

We plan to refresh the data at least quarterly. The date shown in the Legend reflects the most recent update.

Open the map and move to the desired region in Dominion Energy’s electric service territory in Virginia and North Carolina, zooming in (+ button) and out (- button) as needed. A “Find address or place” search tool is located in the upper left-hand corner. Click the “L” button to see the legend showing the capacity range indicated by each line color.

Hosting Capacity Availability (color codes on legend)

<24 MW

<20 MW

<16 MW

<12 MW

<8 MW

<4 MW

Date Map Last Updated

No, we are not currently offering this data for download, only as an interactive map tool. Our current focus is on completing the initial implementation to include making similar data available for smaller installations like rooftop solar for homeowners. We will include data download functionality for consideration in future enhancements.

Hosting capacity analysis is intended to provide general guidance about which parts of the Dominion Energy electric distribution system may be more suitable to hosting distributed energy resources (DER). Increasing the penetration of DER is part of the plan to achieve Dominion Energy’s renewable energy goals.

Hosting capacity analysis is performed with electric distribution modeling software. Each distribution feeder is analyzed to determine how much additional renewable generation can be safely and reliably integrated to each segment of the feeder without causing problems to existing customers and facilities or making additional system upgrades. The analysis considers thermal limits, reverse power flow specifications, and voltage effects.

The analysis results are presented on a map showing the potentially available capacity for additional generation in each area, with lines colored by capacity ranges. Data is shown in megawatts (MW) of available hosting capacity for generation.

Note: The hosting capacity map does not consider the impact of DER on the performance of voltage regulating devices such as substation or line regulators and transformer LTCs, and their ability to maintain voltage within filing. An interconnection study will be needed to confirm the information shown in the hosting capacity map.

The current version of hosting capacity analysis excludes industrial feeders, network feeders, one- and two-phase lines, conductor after a stepdown transformer or voltage regulator, 4 kV feeders, and conductor within proximity of the company’s critical assets or customers. The analysis does not consider projects that are in earlier stages of development but are not yet connected as active generation.

Visit the Parallel Generation & Interconnections page for additional information.

The suggested available hosting capacity may be used for general assessment of the prospects for siting new DER in an area. As an example, a site under consideration that is surrounded by facilities with low available hosting capacity may be less economical and efficient than a site near facilities with higher available hosting capacity. The legal disclaimer associated with the hosting capacity tool applies to all usage of the tool. All new DER projects must go through the required application and analysis processes.

The term “generation” refers to any type of system that provides electrical energy through the conversion from another form of energy, such as sunlight, wind, flowing water, or heat. The “electric distribution system” refers to the set of facilities, including wires and transformers, that distribute energy from electric substations to consumers, such as residences, businesses, and industrial sites.

Distribution includes medium voltage power lines (1,000 – 35,000 volts), but not the higher voltages of the electric transmission system. Larger generation facilities, such as fossil fuel power stations, nuclear power stations, wind farms, and very large solar farms, are typically connected directly to the bulk electric transmission system.

The term “distributed energy resources” (DER) refers to generation systems connected to the electric distribution system. This includes rooftop photovoltaic (PV) systems, solar farms, and small wind turbines. DER may also include battery energy storage systems. Some DER is capable of injecting power back onto the distribution system.

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