Solar Payback in Longueuil 2026
Longueuil solar systems typically pay for themselves in 18 years. See the math by system size, with Hydro-Quebec rates and available Quebec rebates.
Last verified:
Short answer
Solar in Longueuil typically pays back in 18 years for a right-sized 6 to 10 kW residential system. Payback varies with your Hydro-Quebec rate (average 7.3¢/kWh), 2,051 annual sun hours in Longueuil, net system cost after Quebec rebates, and how much production you self-consume. See system-by-system math below.
18 yrs
Typical Payback
7.3¢/kWh
Electricity Rate
2,051
Sun Hours/Year
$3.35/W
Installed Cost
How Longueuil Solar Payback Is Calculated
Payback (years) = Net System Cost / Annual Bill Savings
Net system cost is your installed cost minus available rebates. Annual bill savings equal annual production times your effective rate, adjusted for self-consumption. In Longueuil, we use 2,051 sun hours, 13% capacity factor, Hydro-Quebec rate 7.3¢/kWh, and 85% self-consumption.
Assumptions used on this page
- • Installed cost mid-range: $3.35 per watt
- • Annual production: 13% capacity factor times 8,760 hours per year
- • Electricity rate: 7.3¢/kWh flat (does not model TOU or ULO)
- • Rebate: None modelled (some provinces have utility credits or municipal financing)
- • Self-consumption ratio: 85%
- • No rate escalation modelled (real payback is shorter with rate increases)
Longueuil Payback by System Size
| System | System cost | Rebate | Net cost | Annual savings | Payback |
|---|---|---|---|---|---|
| 4 kW | $13,400 | — | $13,400 | $283/yr | 47.3 yrs |
| 6 kW | $20,100 | — | $20,100 | $424/yr | 47.4 yrs |
| 8 kW | $26,800 | — | $26,800 | $565/yr | 47.4 yrs |
| 10 kW | $33,500 | — | $33,500 | $707/yr | 47.4 yrs |
| 12 kW | $40,200 | — | $40,200 | $848/yr | 47.4 yrs |
Estimates assume 13% capacity factor, 7.3¢/kWh, 85% self-consumption, no rate escalation. Actual payback varies with roof orientation, shading, usage pattern, and financing.
See Your Longueuil Solar Payback
Enter your address for a payback estimate that uses your actual roof, usage, and rate plan.
Get a free estimateLongueuil Solar Payback FAQs
Compare Solar Payback in Nearby Quebec Cities
See how Longueuil payback compares to other Quebec cities.
Related Resources
Solar Cost in Longueuil
See installed pricing for Longueuil.
Learn moreLongueuil Solar Calculator
Get a personalised estimate.
Learn moreSolar Payback Period Canada
National overview.
Learn moreSolar in Quebec
Complete Quebec solar guide.
Learn moreSolar Rebates & Incentives
Find rebates in Quebec.
Learn moreSolar Payback Montreal
Compare payback in Montreal.
Learn moreSolar Payback Quebec City
Compare payback in Quebec City.
Learn moreSolar Payback Laval
Compare payback in Laval.
Learn moreFree Solar Estimator
Get a quote.
Learn more— Sources: NRCan, Hydro-Quebec published rates.