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Solar panels in Oakville, ON

Roofs in Oakville get about 1,467 hours of usable sunlight a year — less than 65% of the cities we've measured. Here's what that means in cost, savings and payback, using real rooftop data rather than a national average.

1,467Sun hours / yr
22Panels typical
CA$25,080Cost after credit
15.2 yrPayback
Be careful in Oakville. At a 15.2-year payback, solar here is a long-horizon decision, mostly because electricity is relatively cheap (15.2¢/kWh). It can still make sense if rates rise or you have local incentives — but check the numbers hard before signing.

Check your specific roof in Oakville → City averages are a starting point; your own roof's size, pitch and shading change the answer a lot.

What a typical Oakville solar system costs

A 22-panel system (8.8 kW) is about right for an average Oakville home using 10,800 kWh a year. It would produce roughly 10,973 kWh annually and offset 100% of that usage.

Estimated economics by system size in Oakville, at 15.2¢/kWh
SystemSizekWh/yr Net costSaves/yrPayback
8 panels3.2 kW 3,990CA$9,120 CA$607 15 yrs
12 panels4.8 kW 5,985CA$13,680 CA$910 15 yrs
16 panels6.4 kW 7,980CA$18,240 CA$1,213 15 yrs
20 panels8 kW 9,976CA$22,800 CA$1,516 15 yrs
26 panels10.4 kW 12,968CA$29,640 CA$1,724 17.2 yrs

Notice that payback barely improves as systems get bigger, and eventually gets worse. That's because you can only save money on electricity you were going to buy anyway. Once a system covers your usage, extra panels mostly generate exports at a much lower rate.

Why Oakville gets 1,467 sun hours

That figure comes from Google's analysis of real rooftops across Oakville — it already accounts for shading from trees, chimneys and neighbouring buildings, which is why it's lower than the raw "hours of daylight" figures you'll see elsewhere. An unusually open, unshaded roof in Oakville reaches about 1,501 hours, roughly 2% better than typical.

The numbers behind this page

Typical usable sunlight1,467 hrs/yr
Unshaded roof1,501 hrs/yr
Electricity rate (Ontario avg)15.2¢/kWh
Installed cost assumed$2.85/W
Panel size assumed400 W
Typical household usage10,800 kWh/yr
Power used as generated34%
Paid for exported powerfull retail (net metering)
Rooftops sampled here11
Google imagery from2018

Nearby cities

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See all of Ontario → statewide sunlight, rates, incentives and every city we've measured.

Oakville solar questions

How many solar panels do I need in Oakville?

About 22 panels for an average home. Oakville roofs get 1,467 usable sun hours a year, so each 400W panel produces roughly 499 kWh annually.

Is solar worth it in Oakville?

At 15.2¢/kWh and 1,467 sun hours, a typical system pays for itself in about 15.2 years and returns roughly CA$16,125 over 25 years. That is slower than the national average, so compare quotes carefully.

How much do solar panels cost in Oakville?

A 8.8 kW system costs about CA$25,080 before incentives . Prices vary by installer, roof complexity and equipment.

Worth reading before you buy

What your utility pays for exportsChanges payback more than any equipment choice 12 questions to ask before signingIdentical systems vary 30–40% in price Is my roof any good for solar?Guide Is a battery worth it?Guide

Estimates only, generated 2026-08-22 from Google Solar API rooftop samples and average Ontario electricity rates. Not a quote and not financial advice. Your roof, usage, utility plan and local incentives will change these numbers — get real quotes before buying.