How Much a Home Solar Battery Costs in 2026

A home battery that can run the essentials through an evening or an outage, typically 10 to 15 kWh of usable storage, usually lands between US$12,000 and US$20,000 installed in the United States, and roughly CA$15,000 to CA$25,000 in Canada, before any rebate. Smaller 5 kWh units start closer to US$7,000 to US$10,000. Those are typical ranges from quotes across many markets, not a price list, and the final number depends on the battery brand, your inverter, your electrical panel and local permit fees.

The price per kilowatt-hour

Installers often talk about batteries in dollars per usable kilowatt-hour, which makes it easier to compare a 10 kWh quote with a 13.5 kWh one. For a complete installation with the battery, inverter or integration hardware, backup switching, wiring, labour and permits, a typical figure in 2026 is US$1,000 to US$1,500 per usable kWh, or about CA$1,200 to CA$1,800 in Canada.

Ask for usable kWh in writing, since some products reserve part of the cell to protect its lifespan and the nameplate figure is higher. The per-kWh price also drops as the system gets bigger, because the fixed parts of the job (backup gateway, sub-panel, permit, the crew's day) cost the same whether you buy one battery or two.

What is included in a full quote

A battery quote that only covers the battery itself is incomplete. A finished installation normally includes:

• The battery module or modules. Most products sold today use lithium iron phosphate (LFP) cells, which tolerate daily cycling well and are considered safer than the older nickel-based chemistries.
• The inverter side. A battery needs either its own built-in inverter or a hybrid inverter that handles both the panels and the battery. If your existing solar inverter cannot talk to a battery, a hybrid swap is often part of the job and adds a few thousand dollars.
• Backup switching. For the house to run on the battery during an outage, the system has to disconnect from the grid automatically. That is done by a gateway or transfer switch, and in many homes a separate critical-loads panel that carries only the circuits you want backed up.
• Electrical work, permits and commissioning. Conduit, wiring, breaker space, the municipal permit and inspection, and setting up the charge schedule and app. Some utilities also require an interconnection update when storage is added to an existing solar system.

If a line is missing from the quote, ask what happens when that part turns out to be needed on install day.

Factors that raise the bill

Several site conditions push a battery project above the typical range:

1. A full electrical panel. Older homes with a 100 A panel and no spare breaker space may need a panel upgrade, typically US$2,000 to US$5,000 on its own, or a load-management device as a cheaper workaround.
2. Whole-home backup instead of essentials. Backing up central air conditioning, an electric range or an electric vehicle charger means a larger battery bank and heavier switching hardware. Essentials-only backup (fridge, furnace fan or boiler controls, sump pump, internet, some lights and outlets) is far cheaper and covers what most people actually miss during an outage.
3. Long cable runs or cold placement. A battery far from the main panel costs more in conduit and labour, and one in an unheated garage may need a heated model or insulated enclosure to stay within its operating temperature.
4. Retrofitting an older solar system. Adding storage to panels installed eight or ten years ago can mean a new hybrid inverter, updated monitoring and sometimes new rapid-shutdown hardware to meet the current electrical code.
5. Local permit and utility fees. These range from under a hundred dollars to over a thousand depending on the jurisdiction.

How long a battery lasts

Most home batteries carry a 10-year warranty, and a few now offer 12 or 15 years. The warranty usually promises that the battery will still hold a stated share of its original capacity, often around 70 percent, at the end of the term, and may also cap total energy throughput or the number of cycles. A battery cycled once a day for self-consumption will reach those limits sooner than one kept mainly for backup.

For the cost comparison, that means dividing the installed price by the warranted years, not by the 25 to 30 years people use for panels. A US$15,000 battery over 10 years is US$1,500 a year before any savings or incentives, which is the number to weigh against your actual outage risk and your rate plan.

Incentives in 2026

In the United States, the 30 percent federal homeowner credit that covered batteries ended for installations completed after December 31, 2025. We wrote a separate guide on what changed with the solar tax credit in 2026, including how leased systems and businesses are treated. State and utility programs continue in some places: California's Self-Generation Incentive Program has funded home batteries with larger amounts for fire-risk areas and lower-income households, and utilities in states such as Massachusetts and Vermont run programs that pay battery owners for sharing stored power during summer peak events. Availability and amounts change often, so ask the installer to confirm the current status before counting on anything.

In Canada there is no federal rebate specific to home batteries at the time of writing. Some provinces and utilities have offered time-limited programs, and a few have piloted paying homeowners to let the utility draw from their batteries at peak times. A good quote states which programs may apply in your province and what paperwork is involved.

When a battery makes financial sense

A battery pays off in a limited set of situations, and it helps to be honest about which one applies to you.

• Frequent or long outages. If your area loses power several times a year, or an ice storm has left you without heat for days, backup is the reason to buy. The value is comfort and avoided losses (frozen pipes, spoiled food, a flooded basement), not a line on the electricity bill.
• Time-of-use rates with a big spread. Ontario's ultra-low overnight plan, for example, prices on-peak power at roughly ten times the overnight rate. A battery charged overnight or from midday solar and drained in the evening captures that spread every day. Homeowners in Toronto and the rest of the province are the clearest case for this in Canada.
• Low export credits. Where the utility pays little for solar sent to the grid, storing your own production for the evening is worth more than exporting it. Several US states have moved in this direction.
• Flat, low rates and few outages. In Quebec, where residential power is inexpensive and billed at a flat rate, a battery is very hard to justify on savings, and most buyers choose one strictly for outage protection.

If none of these fits, net metering with a battery-ready hybrid inverter is often the better move: you get the solar savings now and can add storage later without a second inverter swap.

Frequently asked questions

Can a battery be added to solar panels that are already installed?

Usually, yes. If the existing inverter is a hybrid model or the battery comes with its own inverter, the addition is straightforward. Older string inverters often cannot work with storage, so the installer replaces the inverter with a hybrid unit at the same time, which adds to the cost but also modernizes the system.

How many kilowatt-hours does a house need for backup?

Essentials-only backup for a typical house, meaning the fridge, furnace fan or boiler controls, sump pump, internet and a handful of lights and outlets, often draws 5 to 10 kWh over a day without air conditioning. One 10 to 15 kWh battery usually covers a day of that, and solar panels recharge it if the sun is out. Whole-home backup with central air or electric heat needs two or more batteries.

Do home batteries work in cold Canadian winters?

Yes, as long as they are installed within their rated temperature range. Most lithium batteries stop charging below about freezing and lose some capacity in the cold, so installers in Canada and the northern US typically mount them indoors, in a heated garage or in an insulated enclosure. The quote should name the location and explain why it was chosen.

Get a written battery quote

Tell us your city, whether you already have solar panels, which circuits you want to keep running during an outage and roughly what you pay per month for electricity. A local specialist reviews your panel, your inverter and your rate plan and sends a written quote with the battery size, the equipment, the backup setup, any programs that apply and the full installed price. Request a quote here. It is free, and there is no obligation.