The yield figure, and what to do with it
Natural Resources Canada's municipal photovoltaic dataset gives Petawawa about 1,197 kWh a year for each kW of installed capacity on a well oriented, unshaded array. The honest way to use that number is as an upper bound you subtract from: knock something off for a plane facing away from south, more for shading through part of the day, and more again for a roof pitch that is far from ideal. What you should not do is treat it as a promise about your specific address.
The useful move is to run it backwards. Take twelve months of kWh totals off your own electricity bills, divide by the yield figure, and you have a rough kW of panel capacity that would match your annual consumption. That gives you a number to test quotes against, which is a far better position than judging proposals on price alone when each one is offering a different size.
Then adjust for the two seasonal realities of eastern Ontario. Winter output is a fraction of summer output, and snow cover can hold panels near zero for days at a time. Net metering credits smooth that out across the year rather than month by month, which is precisely why you size against an annual total rather than against a summer week.
Applying to Hydro One from Petawawa
Hydro One is the distributor here, which means your net metering application goes to a large provincial organisation rather than a municipal utility office. In practice that is a mixed bag: the process is well documented and installers across Ontario deal with it constantly, but you are in a queue, and the timeline is not something the Town of Petawawa influences.
The terms are the Ontario standard. Exported kWh are credited kWh-for-kWh against future bills at the retail rate, unused credits carry forward for up to 12 months, and there is no cash payout if you finish the year in surplus. That last point is the one that catches people out: a system deliberately oversized to bank a large annual surplus is not converting that surplus into money, it is donating it. Size to your own consumption.
Hydro One bills residential customers on time-of-use pricing, so when you consume matters, not only how much. It is also why battery storage changes the arithmetic here rather than just adding cost: a battery lets midday production serve evening load instead of being exported at a credit you may not fully use. Whether that pays for itself is a question for your own consumption pattern and a specific quote.
One provincial change is worth flagging because it affects which process you get. On May 1, 2026 the Ontario Energy Board lifted the simplified micro-embedded generation threshold from 10 kW to 12 kW. A design that comes in at or under 12 kW stays on the streamlined connection route, and given typical house sizes here that covers most residential projects.
Row houses are 12.4 percent of Petawawa homes
Petawawa's 6,765 dwellings are 70.4 percent single-detached, so most homeowners are working with a private roof and usually a choice of planes. For that majority the constraints are the ordinary ones: orientation, shading, the condition of the roof covering, and how much unobstructed area a single face offers.
The distinctive number here is row houses at 12.4 percent, which is high for a town of this size and means more than one home in eight has a narrow, structurally shared roof plane. On a row house the limit is usually physical rather than regulatory: only so many modules fit on the usable face, and that fixes the system size regardless of what your annual consumption would justify. If that is your home, ask an installer for the module count that actually fits before you discuss anything else, because it determines whether the project is worth doing at all.
Two other features shape the picture. Semi-detached houses are 6.7 percent, where the roof is yours but the roofline is shared with a neighbour, so anything running toward the party wall needs coordinating and sometimes needs the neighbour on side. And high-rise apartments are entirely absent here at 0 percent, which is unusual: Petawawa simply does not have the tower stock where the roof decision belongs to a corporation rather than a household.
The permit: fees in a separate schedule, no published timeline
Petawawa's Building Department handles residential permits, but the fee amounts are not on the main permit page. They are set out in a separate annual Building Permit Fees schedule, which means you need to ask for the current schedule rather than reading a number off the page. Ask for it in writing and ask which year's schedule you are being quoted from, since it is revised annually.
The page also does not call out solar panels specifically, and it does not publish a town-specific review timeline. Neither of those is a reason to skip the permit. It means you should ring the Building Department, describe the project, and get their own answer on whether they treat a rooftop array as a building permit item and what they need to see. That conversation costs one phone call and removes the single most common source of mid-project delay.
Be careful with turnaround claims from anyone else. Because the town publishes no review time of its own, a specific number of days quoted by an installer is their experience of past files, not a commitment Petawawa has made. Ontario sets a statutory maximum for building permit decisions province-wide, which is a ceiling rather than a prediction, and it is not a Petawawa promise either. Build the schedule with slack in it.
Provincial and federal money, as it stands now
The Home Renovation Savings Program is the live provincial one, with combined rebates of up to $10,000 for solar PV paired with battery storage in the 2026-27 programme year running April 1, 2026 to March 31, 2027. The condition attached is important in a Hydro One town: homeowners taking the HRSP solar incentive are generally directed to a load-displacement configuration rather than full net metering. Since a battery paired with load displacement is a natural fit with time-of-use pricing, that may suit you fine, but it is a design decision made at application time and hard to unwind afterwards. Get your installer to spell out which configuration they are quoting.
On the federal side, the Canada Greener Homes Loan closed to new applications on October 2, 2025. It had offered interest-free borrowing up to $40,000 and is now only funding files approved before that date. The Canada Greener Homes Affordability Program took over in September 2025, delivering 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 publishing its own technology list. Canada does not offer a residential solar tax credit comparable to the American one.
Finally, local financing programmes such as local improvement charges or on-bill arrangements surface periodically through Ontario municipalities and utilities. Availability changes, so treat it as a question to put to the Town of Petawawa and to Hydro One at the time you are buying rather than as a fixed part of the plan.