How Much Can I Save With Solar in Ontario? A Bill-by-Bill Breakdown

The most common question Ontario homeowners ask before going solar is a simple one: how much money will I actually save?

It sounds like it should have a simple answer. But the number depends on which part of your bill solar affects, which incentive path you choose, how your rate plan works, and what your electricity consumption looks like across twelve months.

This guide gives you that answer — clearly, honestly, and line by line. Not the optimistic version that eliminates your entire hydro bill. The accurate version that shows you exactly where solar saves money, where it doesn't, what a realistic annual savings figure looks like at different consumption levels, and how to calculate your own 25-year return before you call a single installer.

Key Takeaway: Most Ontario homeowners save $1,400–$2,400 per year with a properly sized solar system. But solar does not eliminate your hydro bill — it reduces the electricity commodity portion while delivery and regulatory charges continue. Understanding this distinction is the difference between an accurate financial decision and an expensive disappointment.

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Before calculating what solar saves, you need to know what you are paying for. An Ontario residential electricity bill is not a single charge — it is made up of at least four distinct cost categories, and solar only affects one of them directly.

The Four Components of an Ontario Hydro Bill

1. Electricity Commodity Charges This is the cost of the actual electricity you consume, priced per kWh under your chosen rate plan — Time-of-Use (TOU), Ultra-Low Overnight (ULO), or Tiered. This is the portion solar directly reduces. It typically represents 35–45% of your total bill.

2. Delivery Charges These cover the cost of transporting electricity from generators to your home through Hydro One's provincial transmission system and your local distribution company's (LDC) network. Delivery charges include a fixed monthly customer charge — regardless of how much electricity you use — and a variable component based on consumption. For Toronto Hydro customers, the fixed customer charge alone is $51.18 per 30-day billing period as of January 2026. Delivery typically represents 30–40% of your total bill.

3. Regulatory Charges These cover the costs of administering Ontario's wholesale electricity market, operating the provincial grid, and funding conservation programs. They are set by the Independent Electricity System Operator (IESO) and the Ontario Energy Board (OEB). These are a relatively small portion of the bill but cannot be eliminated.

4. Ontario Electricity Rebate (OER) and HST The Ontario Electricity Rebate is a provincial credit automatically applied to eligible residential bills — currently at 23.5% as of November 2025. HST of 13% is applied to the pre-rebate total. Solar does not affect either of these.

What Solar Does and Does Not Touch

| Bill Component | Affected by Solar? | Notes | |---|---|---| | Electricity commodity | ✅ Yes | Directly reduced by self-consumption; net metering credits offset future commodity charges | | Variable delivery charge | ✅ Partially | Reduced as grid consumption falls, but not eliminated | | Fixed customer charge | ❌ No | Charged regardless of consumption or solar production | | Regulatory charges | ❌ No | Fixed by province and IESO | | Ontario Electricity Rebate | ❌ No | Applied to remaining bill regardless | | HST | ❌ No | Applied to remaining taxable charges |

The single most important thing to know: Even with a perfectly sized solar system generating 100% of your annual electricity consumption, you will still receive a monthly hydro bill. Delivery charges, your fixed customer charge, and regulatory fees continue. For most Ontario homeowners, this residual bill is typically $40–$80 per month after solar — not zero.

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The value of every kWh your solar panels produce depends on your rate plan. As of the 2025–2026 winter period, Ontario's OEB-regulated rates are:

Time-of-Use (TOU) — Most Common Plan

| Period | Hours | Rate | |---|---|---| | On-Peak | Weekdays 7–11 AM, 5–9 PM | 20.3¢/kWh | | Mid-Peak | Weekdays 11 AM–5 PM | 15.7¢/kWh | | Off-Peak | Evenings, nights, weekends | 9.8¢/kWh |

Solar panels typically generate electricity during mid-peak and early on-peak hours — which means your self-consumed solar saves you at 15.7¢ to 20.3¢/kWh. Net metering credits are calculated at the rate applied at the time of export, which is often mid-peak.

Ultra-Low Overnight (ULO) — Highest Return with Battery

| Period | Hours | Rate | |---|---|---| | On-Peak | Weekdays 4–9 PM | 39.1¢/kWh | | Mid-Peak | Weekdays 7 AM–4 PM and 9–11 PM | 15.7¢/kWh | | Off-Peak | Weekdays 11 PM–7 AM + weekends | 3.9¢/kWh |

On ULO, solar has a nuanced relationship. Panels generate electricity during mid-peak and early afternoon — saving you at 15.7¢/kWh on self-consumption. The high on-peak rate (4–9 PM) is when solar production is tapering off, making battery storage essential to capture the full ULO savings opportunity. Without a battery, ULO solar savings may be similar to TOU. With a battery, ULO + solar is the highest-return combination available in Ontario right now.

Tiered Pricing

| Tier | Threshold (Winter) | Rate | |---|---|---| | Tier 1 | First 1,000 kWh/month | 12.0¢/kWh | | Tier 2 | Above 1,000 kWh/month | 14.2¢/kWh |

Tiered is simpler. Solar savings are predictable — self-consumed electricity saves you at your blended rate. For homes consuming over 1,000 kWh/month, every kWh generated above the Tier 1 threshold saves at the higher 14.2¢/kWh rate.

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The clearest way to show real savings is through representative homeowner scenarios at three consumption levels. All scenarios use:

• Location: Ontario (3.3 peak sun hours/day)
• System efficiency: 85%
• Rate plan: TOU (most common)
• Net metering: applied to exported surplus
• Costs reflect 2026 market pricing ($2.50–$3.50/watt installed)

Scenario 1: The Average Ontario Home (800 kWh/month)

Profile: 3-bedroom detached home, annual consumption 9,600 kWh, monthly bill approximately $140–$160 before solar

Recommended system: 8 kW (approximately 20 × 400W panels)

System cost (before rebates): ~$22,400 System cost (after HRSP solar rebate of $5,000): ~$17,400

| Metric | Value | |---|---| | Annual solar production | ~9,300 kWh | | Annual self-consumed | ~6,500 kWh (est. 70%) | | Annual net metered (exported) | ~2,800 kWh | | Annual commodity savings (self-consumed) | ~$975 | | Annual net metering credit value | ~$440 | | Total annual electricity savings | ~$1,415 | | Residual monthly bill (delivery + fixed + regulatory) | ~$55–$70 | | Payback period | ~12.3 years | | 25-year net savings (with 2.5% rate escalation) | ~$28,000–$35,000 |

Scenario 2: The High-Consumption Home (1,200 kWh/month)

Profile: 4-bedroom home with EV charging, annual consumption 14,400 kWh, monthly bill approximately $200–$240 before solar

Recommended system: 12 kW (approximately 28–30 × 400W panels)

System cost (before rebates): ~$33,600 System cost (after HRSP solar rebate of $5,000): ~$28,600

| Metric | Value | |---|---| | Annual solar production | ~13,900 kWh | | Annual self-consumed | ~9,730 kWh (est. 70%) | | Annual net metered (exported) | ~4,170 kWh | | Annual commodity savings (self-consumed) | ~$1,460 | | Annual net metering credit value | ~$655 | | Total annual electricity savings | ~$2,115 | | Residual monthly bill (delivery + fixed + regulatory) | ~$55–$75 | | Payback period | ~13.5 years | | 25-year net savings (with 2.5% rate escalation) | ~$38,000–$48,000 |

Scenario 3: Solar + Battery Home on ULO (800 kWh/month)

Profile: 3-bedroom home, annual consumption 9,600 kWh, ULO rate plan, 10 kWh battery, HRSP rebate applied ($10,000 total: $5,000 solar + $5,000 battery)

Note: This scenario uses the HRSP path — net metering does not apply. System is sized for load displacement only.

System cost: ~$34,000 (solar + battery) After HRSP $10,000 rebate: ~$24,000

| Metric | Value | |---|---| | Annual solar production | ~9,300 kWh | | Battery charges at 3.9¢/kWh overnight | Stored and discharged at 39.1¢/kWh peak | | Annual commodity savings (self-consumption + arbitrage) | ~$2,100–$2,400 | | Residual monthly bill | ~$50–$65 | | Payback period | ~10–11 years | | 25-year net savings | ~$40,000–$50,000 |

ULO + battery is currently the highest-return solar configuration available in Ontario. The 10× difference between the ULO on-peak rate (39.1¢/kWh) and overnight rate (3.9¢/kWh) creates energy arbitrage value that compounds significantly over time.

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Every Ontario homeowner considering solar in 2026 must choose between two fundamentally different financial structures. You cannot combine them.

Path A: Net Metering (No Upfront Rebate)

How it works: Your solar system exports excess electricity to the grid. Your LDC credits those exports at your current electricity rate. Credits carry forward for up to 12 months and offset future consumption charges.

Best for: Homeowners who want simplicity, no battery requirement, and steady year-round bill reduction without a large upfront rebate.

| Pros | Cons | |---|---| | No battery required — lower system cost | No upfront HRSP rebate | | 1:1 credit rate on exports | Credits expire after 12 months | | Works with any LDC in Ontario | No backup power during outages | | Lower total installed cost | Summer surplus may expire if oversized |

Path B: HRSP Rebate + Battery (No Net Metering)

How it works: You receive up to $5,000 for solar panels and $5,000 for battery storage under the Home Renovation Savings Program. Your system is sized to displace load only — it cannot export to the grid under net metering rules.

Best for: Homeowners who want maximum upfront cost reduction, backup power capability, and the ability to leverage ULO rate arbitrage.

| Pros | Cons | |---|---| | Up to $10,000 upfront rebate | Requires battery — higher installed cost | | Backup power during outages | Cannot combine with net metering | | Best synergy with ULO rate plan | System sized smaller (load displacement only) | | Can stack with Enbridge gas rebate (up to $5,000) | More complex system design |

Side-by-Side Comparison (8 kW System, 800 kWh/month Home)

| | Net Metering Path | HRSP + Battery Path | |---|---|---| | System cost | ~$22,400 (solar only) | ~$34,000 (solar + battery) | | Rebate applied | $0 | $10,000 | | Net cost | ~$22,400 | ~$24,000 | | Annual savings | ~$1,415 | ~$2,100–$2,400 | | Payback period | ~11–13 years | ~10–11 years | | 25-year savings | ~$28,000–$35,000 | ~$40,000–$50,000 | | Backup power | ❌ No | ✅ Yes | | Net metering | ✅ Yes | ❌ No |

Bottom line: For average consumption homes in Ontario in 2026, the HRSP + battery path delivers higher total lifetime savings and additional resilience value — if you can manage the higher initial installed cost. Net metering remains the right choice for homeowners who prefer simplicity, lower upfront cost, or do not wish to add battery storage at this time.

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One calculation that is often missed: the Ontario Electricity Rebate (OER), currently at 23.5%, is applied to your total pre-tax bill — including whatever portion remains after solar has reduced it.

This means the OER slightly reduces the apparent value of each kWh your solar system saves, because the electricity you are displacing would have been partially offset by the rebate anyway.

Example:

• Before solar: $150 bill → OER credit of $35.25 → effective bill ~$115
• After solar: $55 bill → OER credit of $12.93 → effective bill ~$42

The absolute saving (before rebate) is $95/month. After factoring in the OER change, the effective bill reduction is approximately $73/month. This is still significant — but a rigorous savings calculation should account for this.

Note: Most solar savings calculators present gross commodity savings without netting out the OER impact. When comparing calculator outputs to real bill reductions, apply a ~10–12% reduction to the stated savings figure to approximate the after-rebate impact.

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One of the strongest financial arguments for solar in Ontario is rate protection. Ontario electricity rates have risen significantly — the November 2025 rate adjustment saw approximately 29–30% increases across all price tiers. Historically, Ontario electricity prices have escalated at 3–5% annually over the long term.

Solar panels, once installed, generate electricity at a fixed effective cost. The financial model improves every year electricity rates increase.

25-Year Savings Sensitivity to Rate Escalation (8 kW System, $1,415 Year 1 Savings):

| Annual Rate Escalation | Total 25-Year Savings (net of system cost) | |---|---| | 0% (flat rates) | ~$22,000 | | 2% per year | ~$27,000 | | 3% per year | ~$31,000 | | 4% per year | ~$36,000 |

Even at a conservative 2% annual rate escalation — well below Ontario's historical average — a properly sized solar system generates over $27,000 in net savings after recovering the full system cost.

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Your actual solar savings will vary from the benchmarks above based on five key factors.

1. Your Annual Electricity Consumption Higher consumption = larger recommended system = greater absolute annual savings. This is the strongest predictor of solar ROI in Ontario.

2. Your Rate Plan (TOU vs. ULO vs. Tiered) ULO + battery currently delivers the highest return. TOU and Tiered are comparable for most standard grid-tied systems. If you are on ULO without a battery, evaluate whether switching to TOU before adding solar improves the economics.

3. Roof Orientation and Shading A south-facing roof at 30–45° tilt is optimal for Ontario. East/west orientations reduce annual output by approximately 15–20%. Significant shading from trees or neighbouring structures can reduce output by 10–30% and must be assessed in a site visit.

4. System Size and Sizing Accuracy Properly matching system size to annual consumption maximizes net metering credit utilization. Oversized systems waste summer surplus as expired credits. Undersized systems leave savings on the table.

5. Which Incentive Path You Choose As demonstrated above, HRSP + battery typically delivers higher total savings but requires a higher installed cost and battery commitment. Net metering is simpler but foregoes the $10,000 upfront rebate.

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You do not need an installer's quote to get a reliable preliminary savings estimate. Follow these steps with your last 12 months of hydro bills:

Step 1 — Find your annual kWh consumption Most Ontario utility accounts (Hydro One, Toronto Hydro, Alectra, etc.) show a 12-month consumption history online or on your bill. Add up 12 months to get your annual kWh total.

Step 2 — Identify your commodity rate Check which plan you are on (TOU, ULO, Tiered). Use a blended estimate of approximately 14–16¢/kWh for a rough commodity calculation on TOU.

Step 3 — Estimate annual solar production Multiply a potential system size (kW) by 1,166 kWh/year (Ontario standard production per kW). For example: 8 kW × 1,166 = 9,328 kWh/year.

Step 4 — Calculate commodity savings Multiply annual kWh produced by your blended commodity rate: 9,328 kWh × $0.15/kWh = $1,399/year in commodity savings.

Step 5 — Subtract your residual bill Your non-commodity charges (delivery, fixed, regulatory) will likely continue at $50–$80/month (~$600–$960/year). This represents the floor of what you will always pay regardless of solar output.

Or — skip all of this and run the numbers automatically:

Use the Free Solar Savings Calculator for Ontario — enter your address and monthly bill. The calculator handles location-based solar irradiance, current Ontario rate structures, and net metering rules automatically — and gives you a personalized breakdown in under two minutes.

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The solar industry, like any high-ticket sales environment, is not immune to inflated savings claims. Before you sign a contract, verify any proposal that includes:

"Your bill will go to zero" This is almost never true for Ontario grid-connected homeowners. Delivery charges, fixed customer fees, and regulatory charges persist. The floor for a residual monthly bill is typically $40–$80 regardless of system size.

Annual savings above $3,000 for an average home For a standard 8 kW system in Ontario on TOU rates, savings above $2,400/year would require very high consumption, near-perfect production assumptions, or aggressive rate escalation projections. Ask the installer to show the production modelling and rate assumptions driving any number above this range.

Payback periods under 7 years without battery and HRSP Net-metering-only systems with no upfront rebate have higher upfront costs and typically produce payback periods of 9–13 years for average-consumption homes. Sub-7-year payback claims may be using unusually high electricity rates, inflated production estimates, or omitting financing costs.

Annual production numbers significantly higher than the NRCan baseline Ontario averages 3.3 peak sun hours/day, producing approximately 1,166 kWh/kW/year for a standard south-facing roof. A quote projecting 1,300+ kWh/kW/year warrants scrutiny unless there is a clear explanation (bifacial panels, optimal south-facing roof, minimal shading, ground mount).

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| Home Profile | System Size | Annual Savings | Payback | 25-Year Net Savings | |---|---|---|---|---| | Small home / 600 kWh/month | 6 kW | ~$1,050–$1,200 | 12–15 yrs | ~$20,000–$26,000 | | Average home / 800 kWh/month | 8 kW | ~$1,400–$1,600 | 11–13 yrs | ~$28,000–$35,000 | | Large home / 1,200 kWh/month | 12 kW | ~$2,000–$2,400 | 12–14 yrs | ~$38,000–$48,000 | | Average home + battery (ULO) | 8 kW + 10 kWh | ~$2,100–$2,400 | 10–11 yrs | ~$40,000–$50,000 |

All estimates reflect 2026 Ontario TOU or ULO rates, standard installation costs, and 2.5% annual rate escalation. Individual results vary based on roof orientation, shading, LDC, and consumption patterns.

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The best position you can be in when speaking to a solar installer is one where you already know what your system should produce, what it should save, and what a reasonable payback period looks like for your home.

That starts with running your own estimate — using your actual electricity consumption and Ontario's current rate structure — before any sales conversation.

Run Your Free Solar Savings Estimate — no signup, no sales call, just your numbers in two minutes.

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Solar Calculator Canada is an independent platform. We do not install solar panels or sell equipment. All savings estimates are based on 2026 Ontario OEB-regulated electricity rates, standard NRCan solar irradiance data for Ontario, and published HRSP program terms as of March 2026. Program availability, rebate caps, and electricity rates are subject to change. Always verify current program terms and obtain a professional site assessment before making a purchase decision.

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FAQs

Find answers to common questions about our solar solutions

Updated for 2026

How much can I save with solar panels in Ontario per year?

Most Ontario homeowners with a properly sized solar system save $1,400–$2,400 per year on electricity bills. Homes on TOU with average consumption typically save $1,400–$1,800. High-consumption homes or those combining solar with battery storage on ULO can reach $2,000–$2,400 annually.

Will solar eliminate my Ontario hydro bill completely?

No. Even with a fully sized solar system, Ontario homeowners continue to pay delivery charges, regulatory charges, and a fixed monthly customer charge. These non-commodity costs typically total $50–$80 per month and are not offset by solar production or net metering credits.

What part of my Ontario hydro bill does solar reduce?

Solar reduces the electricity commodity portion — the charge for the actual kWh you consume. Net metering credits also offset future commodity charges for exported surplus. Delivery charges, regulatory charges, and the fixed customer charge are unaffected by solar production.

How does net metering improve my Ontario solar savings?

Net metering in Ontario lets you export excess solar electricity to the grid for a 1:1 bill credit at your current electricity rate. Summer production surplus is effectively banked to offset winter bills when your panels produce less. Credits expire after 12 months, so system sizing matters.

Should I choose HRSP or net metering in Ontario?

It depends on your consumption profile, rate plan, and appetite for battery storage. HRSP provides up to $10,000 in rebates but prohibits net metering and requires a battery. Net metering requires no battery but provides no upfront rebate. For most average-consumption homes, HRSP + battery delivers higher total lifetime savings when factoring in the rebate value and ULO rate arbitrage.

What is the payback period for solar in Ontario in 2026?

Solar payback periods in Ontario in 2026 range from 8 to 14 years. Higher-consumption homes with well-sized systems tend to see 8–11 year payback. After payback, the system continues generating savings for another 15–20+ years.

How much can I save with solar over 25 years in Ontario?

A properly sized Ontario solar system generates $30,000–$50,000 in net savings over 25 years, accounting for system cost recovery, panel degradation of approximately 0.5% per year, and annual rate escalation of 2–3%. Homes with battery storage on ULO tend toward the upper end of this range.

How much does an Ontario solar system cost after the HRSP rebate?

A typical 8 kW solar system in Ontario costs $18,000–$24,000 before incentives in 2026. With the HRSP solar rebate of $5,000, net cost drops to $13,000–$19,000. Adding battery storage and the full $10,000 HRSP rebate (solar + battery), total net cost typically ranges from $24,000–$30,000 for a solar + storage package.