Tesla Powerwall 3
Whole-home backup, solar storage, and energy independence — installed by an experienced Ontario team. One Powerwall powers an entire home, including heating, A/C and EV charging, with seamless backup transition during outages.
per unit (stackable)
185 LRA motor start
integrated solar inverter
−20°C to 50°C operation
Why Tesla Powerwall makes sense in Ontario
The case for battery storage
Ontario has the steepest peak/off-peak electricity rate gap in Canada — 39.1¢/kWh at on-peak hours vs 3.9¢/kWh overnight on the ULO plan. A Tesla Powerwall lets you charge overnight at 3.9¢ and avoid the on-peak rate entirely. Combined with solar, it unlocks the maximum HRSP rebate and provides whole-home backup. Here's why we install it.
One Powerwall powers an entire average Ontario home — including heating, A/C, fridge, lights, and EV charging — through a typical grid outage. The 185 LRA motor start means central A/C and well pumps come back online seamlessly, not just lights.
With Time-Based Control on the Ontario ULO rate plan, Powerwall charges overnight at 3.9¢/kWh and discharges during the 4 pm–9 pm on-peak window at 39.1¢/kWh. That 35.2¢ spread typically generates $1,000–$1,500/year of pure rate arbitrage — separate from solar savings.
Powerwall 3's 13.5 kWh capacity qualifies for up to $4,050 of the Ontario HRSP battery rebate ($300/kWh, max $5,000). Paired with a new solar PV system, you unlock the full $10,000 HRSP combined rebate. (Solar PV pre-approval required — we handle the paperwork.)
Heat Mode intelligently warms the battery to maintain optimal charge and discharge performance in temperatures as low as −20°C. Powerwall 3 operates from −20°C to +50°C, so it works through a Toronto polar vortex without performance loss.
Powerwall 3 includes an integrated 11.5 kW solar inverter with 6 MPPT inputs at 97.5% efficiency. That replaces a separate string inverter and microinverters — fewer components, faster installation, lower long-term failure surface.
Full system monitoring and control from the Tesla app. Storm Watch automatically charges to 100% when severe weather is forecast in your area, so you're ready before the outage. Time-Based Control runs the arbitrage strategy automatically.
Tesla Powerwall 3 installed with $0 upfront. We combine HRSP rebates and municipal LIC financing so your monthly payment lands near — or below — your current hydro bill.
Store, use, save — automatically
How it works
Charging from grid · 3.9¢/kWh
Store excess energy
When your solar system generates more electricity than your home needs, Powerwall stores the surplus. If you don't have solar yet, Powerwall can also charge from the grid during low-cost ULO overnight hours (3.9¢/kWh).
Use stored energy
Powerwall powers your home day and night, during outages, or whenever grid electricity is most expensive. With the 11.5 kW continuous output, it runs your full electrical panel — not just a critical-loads subpanel.
Save and protect
Time-Based Control automatically discharges during on-peak hours (4 pm–9 pm weekdays at 39.1¢/kWh on ULO) and recharges overnight. Storm Watch tops up the battery before forecast severe weather. You configure preferences once; the system runs itself.
Four operational modes — optimized for your goals
Power on your terms
Best for Ontario homeowners on the ULO rate plan. Powerwall charges during the lowest-cost overnight window and discharges during the on-peak window. Maximizes rate arbitrage savings automatically.
Best when paired with solar. Powerwall stores excess solar generation during the day and powers the home in the evening, minimizing grid imports. Pairs naturally with HRSP load-displacement configuration.
Powerwall stays at full charge, reserved exclusively for grid outages. Best for homeowners who prioritize resilience over daily rate savings — for example, homes with medical equipment or rural properties with frequent outages.
Automatically overrides other modes when Tesla's weather service detects a severe storm forecast within your service area. The battery charges to 100% so you're protected before the storm arrives. Always-on protection layer.
What Powerwall does to your numbers in Ontario
Ontario math
Powerwall in Ontario unlocks three financial layers most homeowners don't realize stack together: the HRSP battery rebate, the ULO rate arbitrage, and the avoided peak-rate consumption. Here's a worked example for a typical 10 kW solar + Powerwall 3 install.
System cost — after rebates
10 kW solar + 1× Tesla Powerwall 3 in Ontario
Annual savings — composition
Where the ~$3,200/year savings come from
10 kW solar + 1× Tesla Powerwall 3
Key takeaways
- HRSP requires solar + battery to be installed as one project — battery-only is not HRSP-eligible.
- HRSP is load-displacement only — you cannot also be on net metering. We pre-design the system for compliance.
- ULO arbitrage runs ~$1,200/year for a typical home with one Powerwall — depends on your usage curve.
- Pre-approval through a registered HRSP contractor is mandatory — Superior Solar Pros handles this on every install.
The full breakdown of HRSP rules, net metering trade-offs, and municipal LIC financing (Toronto HELP, Ottawa Better Homes, $125K available) is on our Ontario rebates guide → See full rebate guide
Powerwall 3 — full specs
Technical specifications
Power
Physical
Environmental
Expandability
Software
Certification & Warranty
Source: Tesla Powerwall 3 official specifications (tesla.com/en_ca/powerwall). Specs current as of May 2026. Full Owner's Manual available from Tesla.
From quote to commissioning in 6 weeks
Full-service installation
Site assessment & energy audit
We review your hydro consumption (12 months), roof orientation, electrical panel capacity, and HRSP eligibility. We model both HRSP (load displacement) and net metering paths against your actual usage so the recommendation is data-driven.
Custom system design
We size the solar array, Powerwall capacity, and electrical interconnection for your home. The design targets maximum HRSP rebate eligibility ($10,000 ceiling for solar + battery) and ULO rate arbitrage optimization.
HRSP pre-approval (critical)
We submit your HRSP pre-installation form and coordinate connection approval with your local distribution company (LDC). No equipment is purchased or installed until written pre-approval is received. Skipping this step kills your rebate eligibility — we never skip it.
Permits & ESA inspection
We pull electrical permits and schedule the Electrical Safety Authority (ESA) pre-inspection. All paperwork stays with us — you receive a single PDF folder at handover.
Installation
Typical install takes 1–3 days for solar + Powerwall. Our crew is trained on Tesla Powerwall installation and ESA-licensed for all electrical work. The integrated inverter in Powerwall 3 simplifies the electrical stack compared to separate string-inverter systems.
Commissioning & warranty
We commission the system, run performance tests, walk you through the Tesla app, and submit the post-installation paperwork to HRSP. Your rebate flows to you after final approval. Tesla's 10-year warranty starts at commissioning.
Tesla Powerwall in Ontario — answered
Common questions
How much does a Tesla Powerwall installation cost in Ontario?
A typical solar + Powerwall 3 install in Ontario runs $25,000–$35,000 before rebates, depending on solar array size and electrical work required. After the HRSP rebate (up to $10,000), net cost is typically $15,000–$25,000. Powerwall-only retrofits (no solar) cost $13,000–$18,000 but do not qualify for HRSP. We provide a fixed-price quote within 24 hours of your site assessment.
Does the Powerwall qualify for Ontario's HRSP battery rebate?
Yes. Tesla Powerwall 3's 13.5 kWh capacity qualifies for up to $4,050 of the HRSP battery rebate ($300/kWh, max $5,000). To claim it, the Powerwall must be installed as part of a new solar PV project — HRSP doesn't fund battery-only retrofits. The full HRSP combined ceiling is $10,000 ($5K solar + $5K battery).
Can I install a Powerwall without solar?
Yes — Powerwall can charge from the grid alone, which is useful for ULO rate arbitrage and backup power. But you would not qualify for the HRSP battery rebate (HRSP requires solar + battery as one project). The math still works on the ULO rate plan, just with a longer payback.
How long can one Powerwall power my home during an outage?
A single Powerwall 3 (13.5 kWh) typically powers an average Ontario home for 12–24 hours, depending on what's running. Heating, A/C, and EV charging draw the most. For longer outages or larger homes, we install 2+ Powerwalls — they stack seamlessly.
Does Powerwall work in Ontario winters?
Yes. Powerwall 3 has built-in Heat Mode that warms the battery in cold temperatures, maintaining performance from −20°C to +50°C. It's designed for Canadian climates — Tesla has thousands installed across Canada including northern Ontario and Quebec.
Can I switch to the ULO rate plan after installing a Powerwall?
Yes — and you should, if rate arbitrage is part of your savings plan. Contact your local utility (Toronto Hydro, Hydro Ottawa, Alectra, etc.) to request the switch. The change is free and typically takes one billing cycle. We walk you through the request as part of commissioning.
What happens to my Powerwall if I sell my home?
The Powerwall stays with the house — it's a hardware installation, not a service. Tesla's 10-year warranty transfers to the new homeowner. If you financed through municipal LIC (Toronto HELP / Ottawa Better Homes), the loan also transfers via the property tax bill — no payout required at sale.
Can I add a second Powerwall later?
Yes. Powerwall 3 supports up to 40.5 kWh of additional capacity per unit through Tesla's Powerwall 3 Expansion. We can either install a multi-unit system upfront or design the initial install with future expansion in mind.
Is Powerwall safe indoors?
Yes. Powerwall 3 uses lithium iron phosphate (LFP)-based chemistry with thermal management, certified to North American safety standards. It's rated for both indoor and outdoor installation. Most Ontario installs are exterior wall-mount, but garage and utility room installs are common.
How does Powerwall 3 compare to Powerwall 2?
Powerwall 3 has higher continuous power (11.5 kW vs 5 kW), integrated solar inverter (P2 needed a separate inverter), and better cold-weather performance with Heat Mode. Powerwall 2 is being phased out for new installs. We install Powerwall 3 exclusively.
Do you handle the HRSP paperwork?
Yes — end-to-end. We submit the pre-installation form, coordinate LDC approval, run the install only after written pre-approval, and submit post-installation documentation. The rebate flows to you after approval. You do not deal with the HRSP portal — that's our job.
What other rebates or financing can I combine with Powerwall?
HRSP can stack with municipal LIC/PACE financing — Toronto HELP (up to $125,000), Ottawa Better Homes (up to $125,000 at 4.33%), and similar programs in Hamilton, Dufferin, London, Kingston, Guelph, Aurora, Durham. These are property-tax-secured loans that cover the remaining cost after HRSP. Full details on our Ontario rebates guide.