Claire WhitakerBy Claire Whitaker

Updated November 2026

Most utilities that offer net metering share a core set of requirements: your home solar system must be grid-tied, sized within a set limit, installed with approved equipment, and approved by your utility before it is switched on. This guide walks through each requirement so you can check where your home stands before you spend money on panels. Exact rules vary by state and utility, so treat what follows as a framework and confirm details with your provider.

Confirm Your System Meets the Size Limit

Most net metering programs cap the size of a system based on your historical electricity use. A common approach allows a system sized to roughly match your annual consumption, though some utilities set a fixed kilowatt ceiling for residential customers instead. Pull at least twelve months of bills, add up your kilowatt-hours, and compare that total with the capacity you plan to install. Keep in mind that a system producing far more than you use may be credited at a lower rate for excess, depending on your utility’s rules. For background on how these credits work, see What Is Net Metering for Solar Panels? A Homeowner's Plain-English Guide.

Shopping for one? See our guide: 6 Best Net Meterings for Commercial Monitors Compared (2026).

Use Approved, Listed Equipment

Utilities typically require that inverters and other grid-connected equipment carry a recognized safety listing, such as UL 1741 certification for inverters. Many programs also require that the installation follow the National Electrical Code and local permit rules. Ask your installer to provide the equipment spec sheets and certification numbers before purchase. Using unlisted parts is one of the most common reasons an interconnection application gets rejected.

Complete the Interconnection Application

Before you energize the system, you must apply to connect it to the grid. The process usually follows these steps:

  1. Gather your account number, service address and meter details from your latest bill.
  2. Submit the interconnection application with system size, inverter model and single-line diagram.
  3. Wait for the utility’s review, which can range from a few days for small systems to several weeks.
  4. Pass the local electrical inspection and any utility-required inspection.
  5. Sign the net metering agreement and receive permission to operate (PTO) before turning the system on.

Some utilities also require a bidirectional meter. If your current meter is not bidirectional, the utility will usually schedule a replacement at no or low cost to you, but check your agreement for the details. For the contract itself, read What Is a Net Metering Agreement? A Homeowner's Step-by-Step Guide.

Meet Ongoing Account and Eligibility Requirements

Once your system is approved, you generally need to keep your account in good standing and maintain the system as designed. Changes such as adding panels, switching inverters or moving the home can trigger a new review. Many utilities also expect you to notify them if you sell the property, since the agreement may transfer to the new owner. Customers on certain rate plans may need to switch plans to receive full credit, so review your tariff each year. If your credits seem off after approval, Why Is My Net Metering Electricity Bill Still High? 6 Causes and Fixes covers the most frequent causes.

Common Mistakes

  • Installing before receiving written permission to operate, which can void the interconnection.
  • Sizing the array without checking your utility’s cap against twelve months of usage.
  • Choosing inverters that are not on the utility’s approved equipment list.
  • Forgetting to update the utility after adding panels or changing equipment.
  • Assuming credits carry over indefinitely; many programs reset or pay out annually.

A clamp-on multimeter helps you check system voltage and confirm the array is producing before you request inspection. View on Amazon

A solar-rated photovoltaic cable tester can help verify string wiring before energizing, which reduces the risk of a failed inspection. View on Amazon

FAQ

Do I need a bidirectional meter for net metering?

In most cases, yes. A bidirectional meter records electricity flowing both into and out of your home, which is how the utility measures your credits. Many utilities replace the meter for you as part of the interconnection process.

Can I net meter a system I installed myself?

Often you can, but the utility will still require an interconnection application, listed equipment and an inspection. Some areas require a licensed electrician to sign off on the work.

How long does approval usually take?

Timelines vary widely by utility and system size, from a few days to several weeks or more. Submitting a complete application with the correct equipment details is the best way to avoid delays.

Conclusion

To qualify for net metering, your system needs to fit your utility’s size cap, use listed equipment, pass inspection and receive written approval to operate. Gather your usage history and equipment documents before you buy, so the application moves smoothly. Electrical and permit work carries real safety risk, so consult a licensed electrician or your utility before connecting anything to the grid.

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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.