Ontario's Plain-English Guide to Custom Home Building📞 705-533-1633 | ☎️ 1-866-868-6606 | ✉️ info@icfhome.ca
Residential Solar in Ontario: What a System Costs in 2026, What It Pays Back, and When It Is the Wrong Order
Heating and efficiency Solar From a builder
Residential Solar in Ontario: What a System Costs in 2026, What It Pays Back, and When It Is the Wrong Order
We have put solar on houses since the days when the province paid 80 cents a kilowatt-hour for it. Those days are gone and the panels are a third of the price, which changes the arithmetic in both directions. Here is the arithmetic.
Short version: A grid-tied rooftop solar system in Ontario installs for roughly $2.50 to $3.50 per watt in 2026, so a typical 7 to 10 kW house system runs $18,000 to $35,000 before any rebate. Under net metering the utility credits you at the retail rate for what you export, and a well-sited system produces about 1,100 to 1,200 kWh per kW per year, which puts simple payback in the 10 to 15 year range on a 25-year-plus panel life. Batteries add $10,000 to $20,000 and are about resilience, not payback. Solar thermal for hot water still works, especially with radiant floors, but heat pump water heaters have taken most of its market. Do the envelope, the windows and a properly sized heat pump first; solar on a leaky house is paying for the leak.
What a system costs
| Item | 2026 Ontario range |
|---|---|
| Installed grid-tied PV, per watt DC | $2.50 to $3.50 |
| Typical house system, 7 to 10 kW | $18,000 to $35,000 |
| Battery storage, 10 to 15 kWh | $10,000 to $20,000 installed |
| Roof reinforcement or re-roof if needed | $0 to $15,000 |
| Electrical panel upgrade if needed | $2,500 to $5,000 |
| Solar thermal (hot water), 2 collectors and tank | $7,000 to $12,000 installed |
Prices move with panel supply and the dollar, so get three quotes, in writing, with the module and inverter named. A quote per watt that is well under the range is usually a smaller system or a thinner warranty. The Ontario Home Renovation Savings Program has offered rebates on solar and batteries; check the current amounts and rules before you sign, because programs change faster than roofs.
How the money comes back
Ontario’s net metering program lets you send surplus power to the grid and take it back as a credit on your bill, at the retail rate, with credits carried forward up to a year. There is no feed-in payment any more; the old MicroFIT contracts closed to new applicants years ago, and anyone still quoting 80 cents a kilowatt-hour is reading a brochure from 2012. Your local utility’s net metering page has the current rules and the application.
A kilowatt of well-sited panels (south-facing, unshaded, 20 to 40 degree pitch) produces about 1,100 to 1,200 kWh a year in southern Ontario. A 10 kW system makes 11,000 to 12,000 kWh, which is most of an all-electric house’s consumption or all of a gas-heated one’s. At a blended retail cost around 15 to 18 cents per kWh including delivery charges you avoid, that is $1,700 to $2,100 a year, so a $28,000 system pays back in 13 to 16 years before any rebate, sooner with one, and then produces for another ten or fifteen years. Honest, not thrilling, and better than it was. Time-of-use and ultra-low overnight rate plans change the number; a house with a heat pump and an EV charging at night does well on them.
Do these first
- Air sealing and insulation. A kilowatt-hour you do not use is cheaper than any kilowatt-hour you make. Air sealing and insulating the house come first.
- The heating system, sized from a real heat loss. A cold-climate heat pump turns electricity into three units of heat; the panels then feed that.
- Lighting, appliances, the water heater (a heat pump water heater cuts hot water energy by more than half).
- Then size the solar to what is left. A tight ICF house with radiant floors on a heat pump and a modest array can get close to net zero without a roof full of panels. SB-12 is the floor; net zero ready is the target.
Batteries, and the outage question
A battery lets the house run on stored solar at night and through an outage. It does not improve payback in Ontario at current prices; it buys resilience and time-of-use arbitrage. If outages are your worry, compare the battery against a standby generator and against the simplest option of all: a house that holds its heat. ICF homes in a power outage explains why a super-insulated house with a warm slab stays liveable for days.
Solar hot water: still worth it?
Solar thermal collectors heat water directly and do it well, 50 to 80 percent of a household’s hot water over a year, and on a radiant floor system the surplus can go into the slab in shoulder seasons. We have installed evacuated tube systems that paid back in five to seven years when fuel was expensive. The catch in 2026 is that a heat pump water heater costs a third as much, needs no roof penetrations or glycol loop, and gets most of the saving. Solar thermal makes sense for big hot water loads (large families, in-floor heat, a pool) and for people who want the technology; for a typical house, PV plus a heat pump water heater is the simpler path.
Permits, roofs and resale
- A building permit is usually required for a roof-mounted array (structural load on the roof) and an ESA electrical inspection always is. Your installer should pull both.
- Put solar on a roof with 15 years of life left, or re-roof first; taking panels off to re-shingle costs thousands.
- Ground mounts cost more but let you choose the angle and skip the roof question; rural lots suit them.
- Ownership: buy outright or finance; avoid lease and power-purchase arrangements that complicate a resale.
- Orientation and shade decide more than brand. A production estimate from the installer should show kWh per year by month, and you should hold them to it.
Related guides on this site
Sources and further reading
Questions people ask
How much does solar cost for a house in Ontario in 2026?
Roughly $2.50 to $3.50 per watt installed, so a typical 7 to 10 kW rooftop system runs $18,000 to $35,000 before rebates. Batteries add $10,000 to $20,000.
Does solar pay for itself in Ontario?
Under net metering, with a well-sited system and retail electricity around 15 to 18 cents per kWh all-in, simple payback is usually 10 to 16 years on panels that last 25 to 30. Rebates shorten it; shade, a poor orientation or a leaky house lengthen it.
Is MicroFIT still available?
No. The MicroFIT feed-in program closed to new applications years ago. Residential solar in Ontario now connects under net metering, where exported power becomes a credit at the retail rate.
Do I need a permit for solar panels in Ontario?
Usually a building permit for a roof-mounted array and always an Electrical Safety Authority inspection for the connection. A reputable installer handles both and the utility's net metering application.
Should I get solar before a heat pump?
Insulation and air sealing first, then a heat pump sized from a heat loss calculation, then solar sized to what is left. Panels on a leaky house with an oversized furnace pay for the waste.
Size it from a heat loss, not a guess
Every heating choice starts with the heat loss of your actual house. OntarioHeatLoss.ca produces the CSA F280 calculation and the mechanical design your permit needs, anywhere in Ontario.
Reviewed and updated October 2026. Costs are Ontario ranges, not quotes; code references are to the Ontario Building Code in force at that date.
Its like you learn my mind! You seem to understand a lot about this, like
you wrote the book in it or something. I think that you simply could do with a
few percent to power the message home a bit, but other than that,
this is fantastic blog. A great read. I will definitely be back.
Good to read.Installing Solar Energy system is the best way to beat rising electricity costs. And I believe solar is going to be the future for home owners and business owners.
I am build a new house 1500 scf and a shed 1000 scf in the alvinston Ontario area and would like more info and pricing for a hot water in floor heating system.
Thanks
Claude
Please give us a call.
Like to know the cost of having solar energy installed at my home
Jim
This is a great article, homeowners who wants to convert to solar energy can get ideas from this.