Claire WhitakerBy Claire Whitaker

Updated November 2026

Net energy metering aggregation lets you apply the bill credits from one solar system to several utility meters you own, such as your home, a detached garage, or a rental unit on the same parcel. This guide explains how the arrangement works, what you need to qualify, and the steps to set it up so your credits land where you want them.

How Net Energy Metering Aggregation Works

Under standard net metering, your solar array exports excess power to the grid during the day and earns credits that offset your electricity use at the same meter. Aggregation changes the accounting. Your utility totals the net generation across all eligible meters on the account, then applies those credits to the meters you choose. A system mounted on the main house can therefore reduce the bill for a shop building that draws far more power than the house itself.

Shopping for one? See our guide: Dominion Energy Net Metering vs Battery Backup: Which Should You Choose?.

Not every utility offers this option, and the rules vary by state and by tariff. Some utilities limit aggregation to meters on the same property, while others allow nearby parcels under the same owner. Check your utility’s net metering tariff before assuming it applies to you.

Step 1: Confirm Eligibility and Meter Details

Before you start paperwork, confirm three things with your utility:

  • Whether aggregation is offered on your rate schedule and whether the meters must share a parcel or simply share an owner.
  • The service account numbers and meter IDs you plan to include.
  • Any maximum system size allowed for aggregated accounts, which is often set by the utility or state rules.

Keep a copy of your most recent bill for each meter. Utilities usually ask for account details that match the bills exactly.

Step 2: Submit the Aggregation Request

Most utilities require a formal request, typically filed alongside or after your interconnection application. Expect to list:

  1. Your solar system’s size and inverter details, as reported on the interconnection application.
  2. Each meter to be included, with its address and account number.
  3. The percentage of generation credit you want assigned to each meter. Most forms require the total to equal 100 percent.

Allocation rules differ. Some utilities let you change percentages once a year, and others allow changes at any time. Ask before you submit.

Step 3: Understand How Credits Are Applied

Credits usually accumulate monthly and roll over, but the way they are applied can affect your savings. Utilities may apply generation to the highest-use meter first, or they may follow the percentages you assigned. If a meter has a fixed monthly charge, it may still generate a bill even when the credits cover the energy charge. Review the first few bills after activation to confirm that the percentages are working as expected.

If you are unsure how your utility handles year-end balances, the related guide on Net Energy Metering True-up: How It Works and What Homeowners Should Check explains what to look for.

Common Mistakes to Avoid

  • Assuming all meters on your property qualify. Many utilities exclude meters with different rate classes or separate parcel numbers.
  • Setting allocations that total less than 100 percent, which can delay approval.
  • Forgetting to update the allocation after you add or remove a meter.
  • Ignoring fixed charges on secondary meters, which can erase the savings you expected.
  • Skipping a review of your bills for the first two to three months after activation.

FAQ

Can I use aggregation for a rental property I own?

It depends on the utility. Some allow aggregation to a separate meter under the same owner, while others require the meters to be on the same parcel. Confirm the rule before buying equipment.

Do aggregated credits expire?

Many utilities roll monthly credits forward and settle any remaining balance once a year. The exact timing is set in your tariff, so check your utility’s policy.

Is professional help needed to set this up?

Many homeowners complete the forms themselves, but a licensed electrician or solar installer can confirm interconnection details. Consult a qualified professional before making changes to your electrical service.

Conclusion

Net energy metering aggregation can put your solar credits to work on more than one meter, provided your utility allows it and your allocations are set correctly. Confirm eligibility first, submit complete paperwork, and check your bills closely after activation. A few careful steps at the start will keep your credits flowing where you expect them.

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Claire Whitaker

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.