How much do solar panels cost in Ontario in 2026?

Somewhere between $2.10 and $4.10 per watt installed, and the width of that is the honest answer rather than a dodge. Solar Calculator Canada publishes $2.42 to $3.50 per watt, Solar Energies in Canada publishes $2.40 to $3.50, and the Ontario installer Xolar publishes $2.10 to $4.10 before HST. On an 8 kW array, Solar Calculator Canada's band works out at $19,360 to $28,000. The calculator multiplies whichever size you enter by all three rather than picking one, and shows each separately so you can see where your quote sits.

Why is the range on this page so wide?

Because the sources are wide apart and we widen instead of averaging. The Ontario installer Xolar publishes $2.10 to $4.10 per watt before HST and prices a 5 kW system at $19,100 to $20,300, where the aggregator guides put 5 kW at $12,000 to $17,500. Averaging those would produce a tidy number that no source actually states. Taking the lowest low and the highest high produces an ugly number that every source sits inside, which is more use to someone about to read three quotes.

Is HST included in an Ontario solar quote?

Often not, and it is worth asking outright. Xolar publishes its per-watt and whole-system figures explicitly before HST. Ontario HST is 13 percent, so on a $25,000 system that is $3,250 of difference, which is bigger than the gap between most competing installers. The calculator shows the figure both ways for exactly that reason.

Do permits and the ESA inspection get added on top?

No, and this is where a lot of online estimates go wrong. Published per-watt prices in Ontario normally bundle equipment, racking, labour, permits and ESA approval already. An ESA notification plus inspection is about $165 to $260 for a residential system under 10 kW, the utility's connection impact assessment is $211 to $306, and a municipal building permit is $214.79 in Toronto. This page lists all three so you can check they appear on a quote, and deliberately does not add them to the total.

Why does a small system cost so much more per watt?

Fixed costs do not shrink with the array. Permits, the ESA notification and getting a crew to the house cost the same whether they are fitting 4 kW or 10 kW, so those costs spread across fewer watts. That is why a 5 kW system at $12,000 to $17,500 is not half of a 10 kW system at $24,000 to $35,000. If your roof and your consumption justify a larger array, sizing it in one go is usually better value than adding to it later.

How much electricity will a system this size actually make?

Natural Resources Canada publishes the answer for every Canadian municipality. A south-facing array at latitude tilt in Toronto produces about 1,163 kWh a year for each kilowatt installed, so an 8 kW system makes roughly 9,300 kWh. NRCan states its figures are accurate to within about 10 percent for most systems, and the calculator shows that band rather than a single number. For scale, the Ontario Energy Board defines a typical residential customer as using 750 kWh a month, or 9,000 kWh a year.

Solar panel cost calculator

Put in the size of the array and this works out what published Ontario rates say it costs, before and after HST, and what Natural Resources Canada expects it to generate where you live. Every rate it uses is named on screen.

Last updated August 28, 2026By The SolarPanelFinder Rooftop Desk

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The short answer, if you only want one line: an installed solar array in Ontario runs $2.40 to $3.50 per watt before HST on the two published guides, so a typical 8 kW system lands around $19,200 to $28,000. One Ontario installer publishes a wider band than either guide, and the calculator uses all three rather than choosing.

What will a system this size cost?

System sizeMost GTA homes are quoted between 5 and 12 kW.Where the roof isChanges the generation figure, not the price.

8 kW installed, before HST

$16,800–$32,800

That is the full spread across three published Ontario rates, widened rather than averaged, because they disagree. With 13% HST on top the same system is $18,984–$37,064.

Ontario, 2026 guide figure - $2.40 to $3.50/WSolar Energies in Canada, Solar Panels Ontario Cost Guide (2026): $19,200–$28,000
Ontario average - $2.42 to $3.50/WSolar Calculator Canada, Ontario Solar Calculator (2026): $19,360–$28,000
One Ontario installer's own published rate, before HST - $2.10 to $4.10/WXolar, Cost of Solar Panels in Ontario (2026): $16,800–$32,800
HST at 13%: $2,184–$4,264
What it should generate a year in TorontoNatural Resources Canada, south-facing at latitude tilt, their stated margin of about 10%: 8,374–10,234 kWh

This is already inside a published per-watt price

Municipal building permitSolar Energies in Canada, Solar Panels Ontario Cost Guide (2026): $215–$244

It is shown so you can check a quote line by line, not added on top. Adding it again would count the same money twice. The electrical work also needs an Electrical Safety Authority notification, and the ESA states that the minimum fee for a residential notification is $88; ask what your installer has allowed for it.

Prices are what published Ontario guides say the work costs, multiplied by the size you entered. They are not a quote and this page cannot see your roof, your electrical panel or your shading, all of which move the number.

The method

How this estimate is put together

Three published per-watt rates, multiplied by your size, then widened rather than averaged.

Solar is priced by the watt in Ontario, which is what makes an online estimate possible at all: multiply a published rate by the capacity you are buying and you have a range. We hold three of those rates, all re-read on 26 August 2026. Solar Calculator Canada gives $2.42 to $3.50 a watt for Ontario. Solar Energies in Canada, a separate 2026 guide, gives $2.40 to $3.50. Xolar, an Ontario installer publishing its own numbers, gives $2.10 to $4.10 before HST.

Those disagree, and the disagreement is informative rather than a nuisance. The aggregator guides put a 5 kW system at $12,000 to $17,500 while Xolar prices the same capacity at $19,100 to $20,300. The likely reason is that an installer quoting a real job carries fixed costs on a small array that a national average smooths away. So this page reports the whole spread and names which source each end of it came from, rather than producing a midpoint that nobody published.

Generation is a separate calculation with a separate source. Natural Resources Canada publishes a photovoltaic potential figure for every municipality in the country, defined as the expected lifetime average production per kilowatt of installed DC capacity, with a performance ratio of 0.75 already applied for inverter and weather losses. Toronto is 1,163 kWh a year per kW for a south-facing array at latitude tilt. NRCan says most systems land within about 10 percent of its figures, so that is the band shown.

What the calculator cannot know is the part that moves a real quote most: the pitch and covering of your roof, whether the electrical panel can carry the array without a service upgrade, how much of the roof is shaded in December, and how the installer prices access. Those are why quotes on the same house differ, and why three of them is the standard advice.

Frequently asked questions

How much do solar panels cost in Ontario in 2026?: Somewhere between $2.10 and $4.10 per watt installed, and the width of that is the honest answer rather than a dodge. Solar Calculator Canada publishes $2.42 to $3.50 per watt, Solar Energies in Canada publishes $2.40 to $3.50, and the Ontario installer Xolar publishes $2.10 to $4.10 before HST. On an 8 kW array, Solar Calculator Canada's band works out at $19,360 to $28,000. The calculator multiplies whichever size you enter by all three rather than picking one, and shows each separately so you can see where your quote sits.
Why is the range on this page so wide?: Because the sources are wide apart and we widen instead of averaging. The Ontario installer Xolar publishes $2.10 to $4.10 per watt before HST and prices a 5 kW system at $19,100 to $20,300, where the aggregator guides put 5 kW at $12,000 to $17,500. Averaging those would produce a tidy number that no source actually states. Taking the lowest low and the highest high produces an ugly number that every source sits inside, which is more use to someone about to read three quotes.
Is HST included in an Ontario solar quote?: Often not, and it is worth asking outright. Xolar publishes its per-watt and whole-system figures explicitly before HST. Ontario HST is 13 percent, so on a $25,000 system that is $3,250 of difference, which is bigger than the gap between most competing installers. The calculator shows the figure both ways for exactly that reason.
Do permits and the ESA inspection get added on top?: No, and this is where a lot of online estimates go wrong. Published per-watt prices in Ontario normally bundle equipment, racking, labour, permits and ESA approval already. An ESA notification plus inspection is about $165 to $260 for a residential system under 10 kW, the utility's connection impact assessment is $211 to $306, and a municipal building permit is $214.79 in Toronto. This page lists all three so you can check they appear on a quote, and deliberately does not add them to the total.
Why does a small system cost so much more per watt?: Fixed costs do not shrink with the array. Permits, the ESA notification and getting a crew to the house cost the same whether they are fitting 4 kW or 10 kW, so those costs spread across fewer watts. That is why a 5 kW system at $12,000 to $17,500 is not half of a 10 kW system at $24,000 to $35,000. If your roof and your consumption justify a larger array, sizing it in one go is usually better value than adding to it later.
How much electricity will a system this size actually make?: Natural Resources Canada publishes the answer for every Canadian municipality. A south-facing array at latitude tilt in Toronto produces about 1,163 kWh a year for each kilowatt installed, so an 8 kW system makes roughly 9,300 kWh. NRCan states its figures are accurate to within about 10 percent for most systems, and the calculator shows that band rather than a single number. For scale, the Ontario Energy Board defines a typical residential customer as using 750 kWh a month, or 9,000 kWh a year.

Sources

Where these figures come from

Solar Energies in Canada, Solar Panels Ontario Installation Cost Guide 2026 - the $2.40 to $3.50 per-watt band and the Toronto and Mississauga permit fees
Solar Calculator Canada, Ontario Solar Calculator (2026) - the $2.42 to $3.50 Ontario band and the 8 kW and 12 kW system figures
Xolar, Cost of Solar Panels in Ontario (2026) - the $2.10 to $4.10 before-HST band and the 5 kW installer quote
Green Building Canada, Solar Panels Cost in Canada - the 5 kW and 10 kW whole-system figures
Electrical Safety Authority, How much does an electrical notification cost - the $88 minimum fee for a residential electrical notification
Natural Resources Canada, Photovoltaic potential and solar resource maps of Canada - annual generation per kW for every municipality in the list

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