Claire WhitakerBy Claire Whitaker

Updated November 2026

Ontario hydro net metering lets your home solar system send surplus electricity to the grid and receive credits against the power you draw later. This guide walks you through the steps to get connected, how credits are applied on your bill, and where homeowners most often run into trouble. By the end, you will know what paperwork to prepare and what to check on your statements.

Step 1: Confirm Your System Qualifies

Net metering in Ontario is designed for grid-connected systems that generate electricity on the customer’s side of the meter. Your system must be sized to offset your own consumption rather than produce power for resale. Most residential systems fall well within the limits, but confirm the maximum capacity your local distribution company allows before you buy equipment.

Shopping for one? See our guide: How Does Net Metering Work in Ontario? Credits, Rules and Who Benefits.

Your installer should also verify that your electrical service and inverter are approved for grid interconnection. Ask for the inverter certification documents early, because the utility will request them.

Step 2: Submit the Connection Application

Before energizing a new system, you need utility approval. The application typically asks for:

  • Your account number and service address
  • System size in kilowatts (DC panel rating and AC inverter rating)
  • Inverter make, model and certification number
  • A single-line diagram of the system, prepared by a licensed electrician or installer
  • Proof of electrical safety authority inspection, where required

Once approved, the utility installs or confirms a bi-directional meter. Do not switch on the system until you have written approval. Connecting without it can lead to rejected credits and safety issues. For the full process, see Hydro One Net Metering: How to Apply and Get Credited for Your Solar.

Step 3: Understand How Credits Are Applied

Under net metering, the meter tracks power flowing in both directions. When your panels produce more than your home uses, the excess flows to the grid and builds a credit. When your home draws more than your panels produce, such as at night, you draw from the credit balance first.

Credits are measured in kilowatt-hours, and the rules for how they carry forward and get valued are set out by the regulator. If you want the detail behind the math, Hydro One Net Metering Rates: How Ontario Solar Credits Work (2026) explains the calculation in plain terms.

Check Your Bill Each Cycle

Compare the generation reading, the consumption reading and the credit balance on every bill. A sudden drop in generation often points to a shaded panel, a failed inverter or a tripped breaker, and catching it early protects your credits.

Step 4: Plan for Seasonal Swings

Ontario solar output drops sharply in December and January, while heating loads often rise. Many homeowners see a credit surplus in summer that is used up over winter. Review your annual totals rather than judging the system by one month. The key question is whether your yearly generation roughly matches yearly use, which is the core of the Is Net Metering Worth It Ontario? A Homeowner's Guide to the Numbers analysis.

Common Mistakes to Avoid

  • Energizing the system before receiving utility approval.
  • Oversizing the array well beyond your annual consumption, which can leave unused credits.
  • Ignoring a bill that shows zero generation during daylight hours.
  • Forgetting to update the utility after changing your inverter or adding panels.
  • Assuming credits never expire; check the current carry-forward rules for your account.

A solar monitoring app or a clamp-on power meter helps you verify generation against your bill, so you spot faults before they cost credits. View on Amazon

A non-contact voltage tester is a useful safety tool for anyone doing basic checks around the service panel, though major work should always go to a licensed electrician. View on Amazon

FAQ

Do I need a bi-directional meter for ontario hydro net metering?

Yes. A bi-directional meter records power flowing to and from your home, which is required to track credits. Your utility typically installs or approves it as part of the connection process.

Can I still get credits if my system is offline?

Credits only accrue while the system is operating and feeding the grid. If the inverter or panels fail, generation stops and no new credits are earned until repairs are complete.

Who should I contact about a billing question?

Start with your local distribution company’s customer service team, and keep your generation and consumption readings handy. For complex electrical issues, consult a licensed electrician or a qualified solar installer.

Conclusion

Ontario hydro net metering rewards homeowners who confirm eligibility, get written approval before switching on, and monitor their credits each billing cycle. Plan around seasonal output so your annual balance stays healthy. Careful setup at the start makes the program far easier to manage over the life of your system.

Ready to choose one?

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.