Typical solar costs in London
London's big suburban lots and straightforward roof geometry make it one of the easier Ontario cities for residential solar.
| System | Typical range | Notes |
|---|---|---|
| 5 kW system | $13,000 – $16,500 | Small home or low usage; ~20 panels |
| 7.5 kW system | $18,000 – $24,000 | Typical Ontario home; ~30 panels |
| 10 kW system | $26,000 – $33,000 | Larger home or EV owner; ~40 panels |
| 10 kW + battery | $36,000 – $48,000 | Adds ~10 kWh storage; unlocks full $10,000 HRS rebate |
What moves the price in London
- Battery or not — storage adds roughly $1,000–$1,300 per kWh installed but unlocks the battery HRS rebate.
- HRS vs net metering — the rebate path and the net-metering path are mutually exclusive; the choice changes system design.
- System size — per-watt pricing improves as systems get larger ($2.42–$3.50/W range).
- Roof complexity — simple gables are cheapest; dormers, hips, and multiple planes add labour.
- Roof material — asphalt shingle is standard; metal is excellent; tile/slate need specialist flashing.
- Shading — trees, chimneys, and neighbouring buildings cut yield and can force costlier layouts.
- Electrical panel — a 100A-to-200A upgrade adds $2,000–$4,000 if the panel can't take the solar breaker.
Local notes for London homeowners
- Large lots mean fewer shading disputes with neighbours' trees.
- London Hydro interconnection is straightforward for systems under 10 kW.
- 1970s–90s subdivisions dominate — simple roofs, easy installs.
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Solar in London: FAQ
How much does solar cost in London in 2026?
Installed residential systems in Ontario run $2.42–$3.50 per watt. A typical London home needs 7.5–10 kW, putting most projects at $18,000–$30,000 before incentives. A competitive local market keeps London quotes near the middle of the provincial range.
Is the Greener Homes Loan available for solar in London?
No. The Canada Greener Homes Loan closed to new applicants on October 1, 2025, and the Greener Homes Grant closed in February 2024. London homeowners should look at Ontario's Home Renovation Savings Program instead: $1,000/kW of solar (up to $5,000) plus $300/kWh of battery (up to $5,000).
Can I use net metering with the HRS rebate in London?
No — you choose one path. HRS-rebated systems must use load displacement (no exporting to the grid). Net-metered systems export surplus for 1:1 bill credits but can't take the HRS rebate. A site assessment should model both.
How long does installation take in London?
Physical installation is 1–3 days. The full process — design, ESA permits, and utility interconnection — typically takes 4–8 weeks in Ontario municipalities.
Will solar work on my London roof?
Most asphalt-shingle and metal roofs are excellent hosts. The key checks are roof age (re-roof first if under ~10 years of life remain), shading, and electrical panel capacity. London's big suburban roofs are straightforward solar hosts.