What is the best solar battery for Canadian homes?

The best battery depends on your goals. For value, the Renon Xcellent Plus 16 kWh sits at $260 to $396 per usable kWh after the HRSP rebate, the lowest on our list. For an integrated system with a built in inverter and unlimited cycles for solar self use, the Tesla Powerwall 3 is the premium pick at $885 to $1,478 per usable kWh after rebate. For higher end to end round trip efficiency in a modular high voltage stack, the Fox ESS PowerQ and Sigenergy SigenStor systems publish 93 to 95%+.

How much does a home battery cost in Canada?

Installed home batteries in Canada range from about $7,500 (Renon Xcellent Plus 16 kWh, no inverter) to $26,000 (Sigenergy SigenStor 2 x BAT 9.0, inverter included) as of September 2026. After the Ontario Home Renovation Savings program rebate, net installed cost ranges from about $3,750 to $21,000 depending on the system. Batteries priced without an integrated inverter usually need a compatible hybrid inverter supplied as part of a new solar system, which is not included in the range shown.

Which battery has the best warranty?

For daily cycling the Renon Xcellent Plus is the strongest published warranty on our list at 10 years or 8,000 cycles. For solar self use and backup, Tesla Powerwall 3 offers 10 years, 80 percent retention and unlimited cycles, which is the most flexible warranty when the battery is not being cycled for daily arbitrage. Fox ESS and Sigenergy publish 10 year warranties with 70 percent retention and a throughput limit that caps total lifetime energy through the battery.

How long do solar batteries last?

Warranty periods on our list are all 10 years. Cycle life varies widely: Renon publishes 8,000 cycles, Tesla publishes unlimited cycles for solar self use and backup use cases, and Fox ESS and Sigenergy use a throughput limit instead of a cycle count. Daily peak shaving uses roughly 365 full cycles per year, so an 8,000 cycle warranty covers more than 20 years of daily use. Expected service life at end of warranty is not the same as failure; most batteries continue at reduced capacity beyond warranty.

Do I need a solar system to install a battery in Canada?

Under the Ontario Home Renovation Savings Program, yes — the battery must be installed with a new solar PV system. Retrofit-only battery installs on existing solar or without solar do not qualify for HRSP. Outside of HRSP, a standalone battery can technically be installed for backup or ULO arbitrage, but there is no provincial rebate to offset the cost.

How do I apply for the Ontario battery rebate?

Your Home Renovation Savings enrolled contractor submits the pre-approval application before purchase. Once approved, install the system and pass ESA inspection. Contractor submits the final claim with invoices. Rebate is paid to the homeowner after review. See our /battery-rebate-ontario page for the full HRSP battery process.

Which battery is best for whole-home backup during outages?

Tesla Powerwall 3 has the strongest integrated backup story on our list with automatic transfer, 11.5 kW continuous output, and unlimited cycles for solar self-use and backup under the Canadian warranty. Fox ESS PowerQ and Sigenergy SigenStor also support backup with integrated inverters. Growatt APX, Renon, and Pion Power require a compatible hybrid inverter to enable backup.

Can I add a battery to an existing solar system?

Yes technically, but the retrofit is more expensive than installing solar and battery together. AC-coupled batteries can be added to any existing solar system. DC-coupled batteries usually require a hybrid inverter swap. Ontario HRSP does NOT cover retrofit-only batteries — it requires a new solar system.

What size battery do I need for my home?

Size by your evening peak load, not total daily consumption. Most Canadian homes have a 3 to 7 kW evening peak (4 PM to 9 PM). A 10 to 15 kWh usable battery covers 2 to 4 hours at that draw, capturing the ULO peak window. Larger batteries make sense for whole-home backup or when combined with a heat pump / EV charging.

Does the Ontario HRSP battery rebate cap on smaller batteries?

Yes. The 50% of eligible cost cap can bind before the $300/kWh rate on low-priced systems. A Renon 16 kWh at $7,500 installed hits $3,750 (50% cap) not the full $4,800 that $300 x 16 kWh would suggest. Larger batteries priced above $10,000 usually earn the full per-kWh amount up to the $5,000 program cap.

What is round-trip efficiency and why does it matter?

Round-trip efficiency (RTE) is the percentage of energy that comes out of a battery relative to what went in. A 95% RTE battery loses 5% each cycle to heat and control losses. Over daily cycling, higher RTE = more usable energy per kWh of solar charging. Fox ESS at above 95% and Sigenergy at 93 to 95% lead on our list; Growatt and Renon do not publish RTE.

Get Free Estimate

Best Solar Batteries Canada 2026

Compare home battery storage systems on capacity, round trip efficiency, installed price, HRSP rebate and warranty. Every row's specs and rebate math trace to a primary source. Installed price ranges are estimates.

Last verified: September 29, 2026

Calculate Your Savings

Battery Comparison Table

Specifications verified September 2026.

Battery	Nameplate	Usable	RTE	Inverter incl.	Installed est. (CAD)	HRSP rebate	After rebate	$/usable kWh	Warranty
Tesla Powerwall 3	13.5 kWh	13.5 kWh	89%	Yes	$16,000 to $24,000	$4,050	$11,950 to $19,950	$885 to $1,478	10 yr, 80% retention, unlimited cycles for solar self use and backup
Growatt APX 10.0P (2 modules)	10 kWh	9 kWh	Not published	No	$9,500 to $12,000	$3,000	$6,500 to $9,000	$722 to $1,000	10 yr
Growatt APX 15.0P (3 modules)	15 kWh	13.5 kWh	Not published	No	$12,500 to $15,000	$4,500	$8,000 to $10,500	$593 to $778	10 yr
Growatt APX 20.0P (4 modules)	20 kWh	18 kWh	Not published	No	$15,500 to $18,500	$5,000 (cap)	$10,500 to $13,500	$583 to $750	10 yr
Fox ESS PowerQ (2 x EQ4000)	7.94 kWh	7.15 kWh	Above 95%	Yes	$11,000 to $14,000	$2,382	$8,618 to $11,618	$1,205 to $1,625	10 yr, 70% retention, throughput limit
Sigenergy SigenStor 2 x BAT 6.0	12.04 kWh	11.68 kWh	93% to 95%	Yes	$15,000 to $21,000	$3,612	$11,388 to $17,388	$975 to $1,489	10 yr, 70% retention, throughput limit
Sigenergy SigenStor 2 x BAT 9.0	18.08 kWh	17.52 kWh	93% to 95%	Yes	$18,000 to $26,000	$5,000 (cap)	$13,000 to $21,000	$742 to $1,199	10 yr, 70% retention, throughput limit
Pion Power 13.5 kWh	13.5 kWh	12.15 kWh	Not published	No	$9,000 to $12,000	$4,050	$4,950 to $7,950	$407 to $654	10 yr / 6,000+ cycles
Renon Xcellent Plus 16 kWh	16 kWh	14.4 kWh	Not published	No	$7,500 to $10,500	$3,750 to $4,800	$3,750 to $5,700	$260 to $396	10 yr / 8,000 cycles
Renon Xcellent Plus x2 (32 kWh)	32 kWh	28.8 kWh	Not published	No	$13,000 to $17,000	$5,000 (cap)	$8,000 to $12,000	$278 to $417	10 yr / 8,000 cycles

Installed price ranges are estimates compiled from Canadian distributor pricing and published installer quotes. They include battery hardware, labour, permitting and ESA inspection. Batteries marked "Inverter incl. No" require a compatible hybrid inverter, normally supplied as part of a new solar system and not included in the range shown. Final cost depends on site conditions, electrical panel capacity and installer.

The Ontario Home Renovation Savings Program battery rebate is $300 per kWh of installed capacity, capped at 50 percent of eligible project cost or $5,000, whichever is lower. Batteries must be installed with a new solar system, pre approval is required before purchase, HST is not an eligible cost, and homes on net metering do not qualify. Rebates depend on eligibility and available program funding and are not guaranteed. Check homerenovationsavings.ca for current status.

Usable capacity is the manufacturer's rating where published; otherwise 90 percent depth of discharge is assumed. Round trip efficiency (RTE) is the manufacturer's stated battery figure. "Not published" means the manufacturer does not state it on the current datasheet.

What is verified and what is estimated

Verified from primary sources

HRSP rebate rules, including the cap at up to 50 percent of eligible costs and a maximum rebate of $5,000 and the HST exclusion.
Tesla Powerwall 3: 13.5 kWh AC nominal energy and 89 percent round trip efficiency, plus the Canada warranty at 80 percent retention over 10 years with unlimited cycles for solar self consumption and backup only.
Growatt APX: depth of discharge 90 percent and 10 year warranty with no published RTE or cycle figure.
Fox ESS EQ4000: 3.97 kWh capacity per module, 90 percent depth of discharge, RTE above 95 percent.
Sigenergy SigenStor: cycle life 10,000, total 6.02 or 9.04 kWh per module, usable 5.84 or 8.76 kWh per module.
Renon Xcellent Plus: 16 kWh nominal, 8,000 cycles, 10 year warranty.
Pion Power 13.5 kWh: 13.5 kWh LiFePO4 nominal, 6,000+ cycles, IP65, cell level UL certification, built in fire suppression, stackable up to 8 units. Confirmed on the manufacturer's Canadian product page at pionpowertech.com.

Estimated

Every installed price range on the table is an estimate compiled from published anchors:

Tesla: installed quotes of $14,000 to $18,000 in Calgary and $23,997 before tax from another certified installer.
Growatt: Frankensolar's Canadian MSRP of $10,224.00 for the APX 15.0P hardware plus $2,500 to $4,500 install.
Fox ESS: EQ4000 modules at $2,200.00 CAD each plus the AIO inverter.
Sigenergy and Renon: distributor hardware pricing plus typical install. Sigenergy has no published Canadian installed pricing, so those two rows carry the widest ranges.
Pion Power: Pion Power does not publish Canadian installed pricing. The range is anchored on typical Canadian 48 volt battery installs of similar capacity that need a separate hybrid inverter, and the usable capacity is a 90 percent depth of discharge assumption because the manufacturer does not publish a usable figure.

Three things to know before you shortlist

Why Renon looks cheap: no included inverter

Renon Xcellent Plus is the only line on this list priced without an integrated hybrid inverter. The "Inverter incl." column shows this. On a full system you will also need to pay for a compatible hybrid inverter, which is normally supplied with a new solar install.

The 50 percent HRSP rebate cap on the Renon 16 kWh

At $7,500 installed, the HRSP rebate on the Renon 16 kWh is $3,750, not the $4,800 that $300 per kWh would suggest, because the 50 percent of eligible costs cap applies. That is why the rebate cell is a range.

Why Sigenergy modules cannot be sold standalone

Sigenergy SigenStor modules are only sold with an Energy Controller, which is why the rows on this table are shown as two module systems. A SigenStor recall was reported in Australia in late 2025. Confirm with the installer that the North American units in your quote are not affected before signing.

Frequently Asked Questions

Ready to see your solar and battery savings?

Get a free estimate for your Ontario home. See production, bill impact and payback in minutes.

Get a free estimate