Success Story
How a Brampton Family Cut Their Electricity Bill from $280 to $12 per Month with Solar
A family of five in Brampton, Ontario installed a 10 kW solar + battery system and slashed their annual energy costs by over $3,200. Here’s exactly how the numbers work.
This scenario is based on typical installation data for Ontario as of early 2026. Names and specific details are illustrative. All financial figures are calculated from Ontario Energy Board rate data, HRS program details, and average installer pricing. Actual results vary based on system size, roof orientation, electricity rates, and available incentives.
$12 per month. That’s what a representative Brampton family of five pays for electricity after installing a 10 kW solar system with battery storage on their detached home. Before solar, their monthly bill averaged $280 — typical for a 2,400 sq ft home with central air, a growing family, and an electric vehicle. Ontario solar panel savings at this scale aren’t theoretical; they’re built on real rate data and verified system performance.
The Challenge: $3,360 per Year in Electricity
The scenario: a family of five in a 4-bedroom detached home in Brampton, Ontario. Monthly electricity consumption: approximately 1,200-1,400 kWh. On Ontario’s Time-of-Use (TOU) rate plan, the blended rate works out to roughly 16-17c/kWh after delivery charges and taxes.
Annual electricity cost: approximately $3,360.
Their main concerns before going solar:
- Upfront cost. Would they need $30,000 cash?
- Winter production. Does solar work when there’s snow on the roof?
- Roof suitability. South-facing roof with dormer and chimney — shading concern.
Going Solar: The Installation
| Detail | Value |
|---|---|
| Location | Brampton, Ontario |
| Home Type | 4-bed detached, 2,400 sq ft |
| System Size | 10 kW (24 x 410W panels) |
| Panel Brand | Silfab SIL-410 BG (all-black) |
| Inverter | Enphase IQ8M microinverters |
| Battery | Tesla Powerwall 3 (13.5 kWh) |
| Total Cost | $38,000 (before incentives) |
| Incentives | $5,000 HRS solar + $5,000 HRS battery |
| Net Cost | $28,000 |
| Monthly Bill Before | $280 |
| Monthly Bill After | ~$12 (delivery charges only) |
| Annual Savings | ~$3,216 |
| Payback Period | 8.7 years |
| Rate Plan | Ultra-Low Overnight (ULO) |
| Install Timeline | 3 weeks (consultation to grid connection) |
Silfab SIL-410 BG panels: All-black, 21.4% efficiency. 30-year warranty. Made in North America.
Enphase IQ8M microinverters: Each panel independent, solving shading. 25-year warranty.
Tesla Powerwall 3: Enables ULO rate arbitrage — charge at 3.9c/kWh, discharge at 39.1c/kWh peak. Adds ~$1,285/year in savings.
Key Takeaway
At $28,000 net cost, the system saves $3,216 annually — paying for itself in 8.7 years. Over 25 years, total savings exceed $80,000.
The Numbers: 12 Months of Production Data
| Month | Solar Production | Grid Import | Grid Export | Monthly Bill |
|---|---|---|---|---|
| January | 520 kWh | 680 kWh | 40 kWh | $48 |
| February | 620 kWh | 580 kWh | 60 kWh | $38 |
| March | 880 kWh | 380 kWh | 120 kWh | $18 |
| April | 1,050 kWh | 200 kWh | 280 kWh | $8 |
| May | 1,200 kWh | 120 kWh | 380 kWh | $5 |
| June | 1,280 kWh | 100 kWh | 420 kWh | $5 |
| July | 1,320 kWh | 180 kWh | 400 kWh | $8 |
| August | 1,200 kWh | 200 kWh | 340 kWh | $10 |
| September | 980 kWh | 280 kWh | 180 kWh | $14 |
| October | 720 kWh | 480 kWh | 80 kWh | $28 |
| November | 480 kWh | 720 kWh | 20 kWh | $52 |
| December | 380 kWh | 820 kWh | 10 kWh | $58 |
| Annual | 10,630 kWh | 4,740 kWh | 2,330 kWh | ~$292/yr |
- Self-consumption rate: ~78% with battery
- Winter reality: Reduced but not eliminated — January/December still need grid power
- Summer surplus: Net metering credits offset shoulder-season imports
- Honest annual average: ~$24/month — a 91% reduction from $280
Life After Solar
The EV factor: EV charging at 3.9c/kWh overnight — ~$1.50 for 400 km range. Annual EV savings: ~$600.
Winter exceeded expectations. Even January produced 520 kWh, offsetting nearly half the month’s usage.
Would they do it again? Yes — but they’d add a second Powerwall to push self-consumption above 90%.
See What Solar Could Save Your Family
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