What a Chatham-Kent roof produces in a year
Chatham-Kent's modelled solar yield is about 1,197 kWh a year for each kW of capacity installed, from Natural Resources Canada's photovoltaic potential data. On that basis a 7 kW array models at roughly 8,400 kWh a year, a 10 kW array at roughly 12,000 kWh, and a system at the 12 kW ceiling for simplified connection at roughly 14,400 kWh. Those are the numbers for a south-facing, unshaded roof at a reasonable pitch, so treat them as the best case rather than a forecast for your address.
Three things move a real install below that figure: which way the main roof plane faces, how steep it is, and what shades it. Ask for a shading assessment on your actual roof, and compare quotes on modelled annual kWh rather than panel count, because the same number of panels laid out on different planes will not produce the same result.
Entegrus bills residential customers on time-of-use pricing, which means the timing of your own consumption is part of the economics rather than a detail. Electricity you use in the same moment you generate it never crosses the meter as an export or an import, so it never enters the credit system at all. Moving heavy loads such as laundry, water heating or vehicle charging into daylight hours, or pairing the array with storage so evening demand comes off a battery, is usually the highest-value adjustment available after the panels are up.
Connecting to Entegrus and how your credits work
Entegrus handles solar interconnection for systems up to 12 kW. The sequence starts with a Preliminary Consultation Information Request and a Micro-Embedded Generation Facility Connection Agreement. Entegrus then checks the capacity of the feeder serving your property and issues an approval letter, after which a Service Layout or an Offer to Connect follows. Electrical Safety Authority approval is required before anything is connected to the Entegrus system.
The feeder capacity check is the step to start early. Its answer depends on the specific line serving your property, and in a municipality spread across more than 20 communities that is not a formality you can assume away, whether you are in Chatham, Erieau, Highgate, Merlin, Pain Court, Bothwell or anywhere between. Submitting the Preliminary Consultation Information Request before you commit to equipment means you learn the answer while the design can still change.
On the billing side, Ontario values exported solar kWh for kWh at the retail electricity rate rather than at a lower export price, and Entegrus surplus credits expire after 12 months if unused. Ontario also pays no cash for net annual excess generation. Together those two rules mean a system's useful size is set by your own annual consumption, not by how much roof you have, which in a municipality of mostly detached houses is a real temptation to resist.
One line on the bill does not move. The Entegrus residential rate card carries a fixed monthly charge of $34.19, billed for having the connection at all rather than per kilowatt-hour, so no amount of generation reduces it. Treat any projection that shows your bill going to zero as incomplete. Note too that Entegrus approval and ESA sign-off are separate from whatever the municipality requires on the building side, so confirm local building requirements before your installer books a crew.
What Chatham-Kent's housing stock means for your roof
Chatham-Kent's housing is overwhelmingly single-detached: 76% of all dwellings, or 33,455 units out of roughly 44,000, which reflects a large rural and small-town land base rather than a single dense urban core. For solar that is close to the best starting position a municipality can have. A detached house means one owner, one roof and one decision, and it usually means enough uninterrupted roof plane to lay out a full-size array in a single orientation rather than splitting it across faces and losing production to the compromise.
The rest of the stock is a small slice by comparison. Low-rise apartment buildings under five storeys account for 5,075 units, concentrated mainly in Chatham and Wallaceburg, and buildings of five storeys or more only 1,540 units across the whole municipality. Semi-detached homes (1,445 units) and row housing (1,535 units) together add a modest share. In all of those cases the roof is controlled by a landlord or a corporation rather than the occupant, so the first step for a resident is a conversation with the property owner rather than a quote.
The dispersed geography has practical consequences for the buying process rather than for the panels. Communities including Blenheim, Bothwell, Dresden, Ridgetown, Thamesville, Tilbury and Wheatley sit well apart from Chatham, so travel time affects which installers will quote your address and how quickly they can return for service. Ask any installer where their crews are based, what their callback commitment is for your community, and who handles warranty service after the install, because on a 20-year asset the answer to that question matters more than a small difference in the up-front price.
Rebates and financing for Chatham-Kent homeowners
Ontario's Home Renovation Savings Program is the main residential incentive. It launched in January 2025 and was expanded for the 2026-27 program year, which runs April 1, 2026 to March 31, 2027, with combined rebates of up to $10,000 for solar PV paired with battery storage. The pairing requirement is not incidental: with Entegrus time-of-use billing and 12-month credit expiry, storage is what lets you use your own generation instead of banking a credit you may not spend.
Settle one question before you apply. Homeowners taking the HRSP solar incentive are generally directed to a load displacement configuration rather than full net metering, so the rebate and the Entegrus credit arrangement described above are not automatically the same project. Ask your installer which configuration they are applying under and confirm the current rules, because it decides how your bill is calculated for the life of the system. Note also that no rebate removes the fixed monthly charge.
Federal support is narrower than most homeowners assume. The interest-free Canada Greener Homes Loan of up to $40,000 stopped accepting new applications on October 2, 2025 and now funds only loans approved before then. Its replacement, the Canada Greener Homes Affordability Program, launched in September 2025 and delivers no-cost retrofits through participating provinces, which do not currently include Ontario, for low- to median-income households, with solar PV federally eligible but each province setting its own technology list. Canada has no federal investment tax credit for residential solar. Beyond those, some Ontario municipalities and local utilities periodically offer financing such as local improvement charges or on-bill repayment, and availability changes frequently, so ask what is currently open in your service area while you are collecting quotes.