By Claire WhitakerDominion Power net metering is the billing arrangement that most grid-tied homeowners in Dominion’s service territory will encounter first, and it is the option that wins for most households that want to offset their electric bill without buying extra equipment. Homeowners who expect frequent outages, or who want backup power during storms, usually come out ahead with a battery added to a net-metered system. Those who only want to shrink a monthly bill will generally find net metering simpler and cheaper to live with.
This comparison looks at two paths: standard net metering with Dominion Power as the utility, and a net-metered solar system paired with a home battery. The goal is to help you decide which setup fits how you use electricity, not to promote one brand or installer.
| Criteria | Net metering only (grid-tied solar) | Net metering plus home battery |
|---|---|---|
| Bill reduction | Strong; excess generation is credited against future usage | Strong; battery shifts solar to evening hours |
| Power during outages | None without a transfer switch and backup equipment; system shuts down for safety | Can run essential loads if the system is designed for backup |
| Equipment complexity | Panels, inverter, racking, interconnection | Adds battery, battery controller, and often a backup gateway |
| Maintenance | Minimal; periodic cleaning and inverter checks | Adds battery monitoring and temperature management |
| Expected lifespan of key parts | Panels commonly rated for 25 years or more; inverters often shorter | Battery warranties vary, often around 10 years |
| Best for | Homeowners focused on bill savings with reliable grid service | Homeowners who value backup power or face frequent outages |
How Dominion Power Net Metering Credits Work
Under net metering, your solar array feeds electricity into the grid when it produces more than your home uses, and your meter runs backward during those periods. When your home draws more power than the array produces, such as at night, you pull power from the grid as usual. Your bill reflects the net difference between what you consumed and what you exported.
Dominion Power has offered net metering in Virginia and North Carolina under state rules and utility tariffs that change over time. Details such as how excess credits roll over month to month, how annual true-ups are handled, and whether you receive credits at retail rates or a different rate depend on the tariff in effect when your system is interconnected. Check the current Dominion rate schedule and your state’s net metering rules before you sign an installation contract.
For a broader explanation of the interconnection process and what happens during a grid outage, read How Grid-Tied Solar Works: Net Metering, Interconnection and Outages. It covers the anti-islanding requirement that shuts grid-tied systems down when the grid is down, which matters a lot when you compare the two options below.
Bill Savings: Net Metering Wins for Most Households
Winner: Net metering only. For most homes, net metering alone produces the largest savings per dollar invested because it uses the grid as a free storage system. Your excess daytime power effectively banks credits you use at night.
Adding a battery can increase self-consumption, meaning more of your solar output gets used on site instead of exported. That matters most where export credits are low or where time-of-use rates make evening power expensive. In a Dominion territory with standard net metering credits, though, the battery’s added cost rarely pays back on bill savings alone. Treat the battery as a resilience purchase first and a bill-saving tool second.
Outage Protection: Battery Setup Wins
Winner: Net metering plus battery. A standard grid-tied system shuts down during an outage. Inverters are required to stop feeding the grid so line workers are not exposed to unexpected voltage. Your panels will sit idle even on a sunny afternoon.
A battery paired with a backup-capable inverter or gateway can isolate your home from the grid and power selected circuits. You will need to decide in advance which loads to back up, such as the refrigerator, well pump, lights, and some outlets. Running central air conditioning or an electric dryer on battery power typically requires a much larger system. If outages are rare where you live, net metering alone may be enough. If you lose power several times a year, the battery is the stronger choice.
For guidance on sizing capacity and reading spec sheets, see Home Battery Specifications Explained: Capacity, Power, Chemistry, Warranty.
Installation Complexity and Cost Considerations
Winner: Net metering only. A grid-tied array without storage has fewer components, a simpler electrical layout, and a shorter list of permits and inspections. Interconnection paperwork with Dominion is required in both cases, but the battery option adds equipment, wiring, and often a second round of inspection.
Do not expect a DIY approach to save you much here. Utility interconnection, electrical code compliance, and warranty requirements usually call for a licensed electrician or a qualified solar installer. Get written quotes that break out panels, inverter, battery, labor, and permits so you can compare them directly. Consult a licensed professional before you finalize any system design.
Maintenance and Long-Term Reliability
Winner: Net metering only. Panels have no moving parts and require little attention beyond occasional rinsing and checking for shading or debris. Inverters are the most likely component to need replacement during the life of the system, and their warranties are often shorter than panel warranties.
Batteries add a layer of upkeep. Owners should confirm operating temperature ranges, keep the unit in a suitable location, and watch state-of-health data through the monitoring app. Battery warranties often specify a minimum retained capacity at a set number of years or cycles, so read those terms closely. Manufacturers specify these limits, and failing to follow them can void coverage.
Environmental Conditions and Location
Winner: Depends on your climate and roof. In regions with frequent storms, the resilience benefit of a battery is easier to justify. Hot attics and garages can shorten battery life, so an indoor or climate-controlled install location is worth the extra wiring. Roof orientation, shading, and snow load matter for both options equally, and they affect how quickly either setup pays back.
Which Should You Choose?
- Choose net metering only if your main goal is lowering your Dominion bill, your outages are rare and short, and you want the lowest upfront complexity.
- Choose net metering plus battery if you live where storms or grid failures are common, you rely on medical equipment or a well pump, or you want backup power for essential circuits.
- Choose net metering only, then add a battery later if you want to start saving now and keep the option of backup power open. Confirm with your installer that the inverter supports future battery integration.
- Choose a portable backup solution instead of a built-in battery if your backup needs are limited to a few devices during short outages. Options like those covered in Best Portable Power Stations for Home Backup: 5 Compared can cover phones, a router, and a fridge for a while without changing your electrical system.
If you are still weighing whether a battery is necessary at all, Does Home Solar Power Require Batteries? Not Always, Here's Why explains the tradeoffs in plain terms.
Product Options
Grid-tied net metering setup (solar panels and inverter): Most installers in Dominion territory will specify a string or microinverter system from established manufacturers. Ask for the inverter model, its listed grid-tie certifications, and whether it can be upgraded for storage.
Home battery for backup: Look for a lithium iron phosphate or similar chemistry battery with a published warranty, a backup-capable gateway, and an app that reports state of health. Confirm compatibility with your chosen inverter before buying.
Portable power station (short-term backup alternative): A portable unit can cover critical devices during short outages and can be recharged from a wall outlet or a small solar panel. It does not connect to your home wiring and will not offset your utility bill.
FAQ
Does Dominion Power pay me cash for excess solar power?
Under standard net metering, excess generation is typically credited against future bills rather than paid as cash. Some tariffs provide an annual true-up that settles any remaining balance. Read your interconnection agreement and the current Dominion tariff to see exactly how credits roll over and what happens at year end.
Will my solar system work during a power outage without a battery?
No. Grid-tied inverters shut down when the grid is out so that utility workers are protected from backfeed. Your panels will not power your home until the grid is restored, unless you have a battery and a backup-capable system designed for islanding.
How long do net metering arrangements last?
Net metering terms are set by state rules and the utility tariff in effect when your system is interconnected. Policies can change, so ask Dominion and your installer which rules will apply to your system for its expected life and whether any grandfathering provisions exist.
Can I add a battery to an existing net-metered system?
Often yes, but it depends on the inverter. Some inverters are designed for future storage integration, while others require replacement. Ask your installer to confirm compatibility, and make sure the interconnection application covers any added storage capacity.
Do I need a permit or utility approval before installing solar?
Yes. Solar installations generally require a local building permit, an electrical permit, and interconnection approval from Dominion before the system can be energized. A licensed contractor usually handles this paperwork. Consult a qualified professional and your local authority having jurisdiction before starting any work.
Conclusion
For most Dominion Power customers, net metering alone is the efficient choice: it lowers bills, requires less equipment, and asks little of the homeowner once installed. A battery makes sense when outages are frequent or when backup power for specific loads matters more than squeezing every dollar of savings. Start with your outage history and your electricity usage pattern, get written quotes that separate the two options, and confirm current Dominion tariff terms before committing. A licensed installer can model both scenarios against your actual roof and consumption data.
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About Claire Whitaker
Claire Whitaker is part of our editorial team and reviews and edits our home solar guides, checking product details against manufacturer specifications and owner feedback.
