Solar Panel Cost in Ontario (2026): Prices by System Size and Payback Math

Solar panels in Ontario typically cost about $2.50–$3.50 per watt installed in 2026, before incentives. That puts a common 8 kW home system at roughly $20,000–$28,000, which would produce about 8,800–10,000 kWh a year on a good south-facing, unshaded roof in southern Ontario.

Those are estimated ranges. The solar panel cost for an Ontario home depends on system size, roof complexity, equipment and the installer. Whether it makes financial sense depends even more on how much electricity you use and how you connect to the grid.

Solar panel cost in Ontario in 2026 by system size

System size	Installed cost at $2.50–$3.50/W (estimate)	Estimated annual output (1,100–1,250 kWh/kW)	Typical fit
5 kW	$12,500–$17,500	5,500–6,250 kWh	Smaller homes, partial offset
6 kW	$15,000–$21,000	6,600–7,500 kWh	Typical gas-heated home, partial to most of use
8 kW	$20,000–$28,000	8,800–10,000 kWh	Typical gas-heated home, near full offset
10 kW	$25,000–$35,000	11,000–12,500 kWh	Larger home, EV or heat pump
12 kW	$30,000–$42,000	13,200–15,000 kWh	All-electric or heat pump home

East- or west-facing arrays produce roughly 85–90% of a south-facing array, and shade can reduce output much more. A typical Ontario home without electric heat uses about 7,000–9,000 kWh a year, so a 6–8 kW system can offset much of it. Heat pump and all-electric homes using 12,000–20,000+ kWh may need a larger system than the roof allows.

What affects the price?

• Roof complexity: multiple faces, steep pitches, dormers and vents add labour.
• Roof condition: if the roof needs replacing in the next 5–10 years, do that first. Removing and reinstalling panels later is costly. See is my roof good for solar.
• Equipment: string inverter versus microinverters or optimizers. Panels are typically warrantied for about 25–30 years and inverters for 10–25.
• Electrical work: panel capacity, a bidirectional meter, ESA permit and inspection, and the LDC connection agreement.
• Battery storage: roughly $12,000–$20,000 installed for about 13–16 kWh, if you want backup power.

Solar payback math in Ontario

Here is the simple payback for an 8 kW system producing 9,400 kWh a year (the midpoint of the output range), enrolled in net metering. The value per kWh is the hardest part to pin down: solar you use directly offsets your full variable cost, while exported kWh earn credits at the retail commodity value. We have used a blended 13–17¢/kWh as an estimate.

Case	Installed cost	Value per kWh	Annual savings	Simple payback
Favourable	$20,000	17¢	9,400 × 17¢ = $1,598	about 12.5 years
Middle	$24,000	15¢	9,400 × 15¢ = $1,410	about 17 years
Less favourable	$28,000	13¢	9,400 × 13¢ = $1,222	about 23 years

These figures assume flat electricity prices, no shading losses and no financing costs. Rising electricity prices would shorten payback; financing interest, inverter replacement and panel degradation lengthen it. Over a 25–30 year panel life, the favourable and middle cases come out ahead; the less favourable case is marginal.

Note: Net metering credits roll forward for up to 12 months and then expire. There is no cash payout, so oversizing a system beyond your annual use does not earn extra money. Run your own numbers with our solar savings calculator.

Rebate or net metering?

The Home Renovation Savings Program reports rebates of up to $10,000 combined for rooftop solar plus battery storage (reported as up to $5,000 for solar and up to $5,000 for a battery). The catch is significant: systems that receive this rebate operate as load displacement and cannot enrol in net metering for the life of the system, so excess exports are not credited.

For a homeowner who is away during the day and exports a lot of summer production, giving up net metering can outweigh the rebate. An analysis by The Atmospheric Fund in July 2026 argued that many homeowners are better off keeping net metering. A household with a battery and high daytime use may find the rebate route works. We walk through both options in solar rebate vs net metering. Confirm current program terms at saveonenergy.ca (opens in a new tab).

The reported net metering change effective 1 May 2026 raised the simplified micro-embedded generation threshold from 10 kW to 12 kW and removed the commercial liability insurance requirement for residential customers. Check with your LDC how it applies to you, and see our post on the 12 kW net metering change.

Before you sign

1. Get at least two or three quotes and compare them on cost per watt, expected annual kWh, equipment model numbers and warranties.
2. Check that the production estimate is realistic: roughly 1,100–1,250 kWh per kW per year for an ideal southern Ontario roof, less for east/west or shaded roofs.
3. Confirm who handles the ESA permit, the LDC connection agreement and the meter change.
4. Read any financing or lease terms carefully, including what happens if you sell the house.
5. Do the cheaper efficiency upgrades first if your goal is lower bills; reducing use shrinks the system you need.

For a full overview, read our complete Ontario solar guide and how to choose a solar installer.

All prices and outputs in this post are estimates for illustration.