A home battery backup system costs between $8,000 and $22,000 installed in 2026, depending on the brand, capacity, and whether you pair it with solar. The median battery price across the industry is $1,130 per kilowatt-hour, up 9% from last year. That number tells you what the hardware costs. The rest of this post tells you what you actually pay after incentives, and whether the math works for your house.
What determines the cost of a home battery?
Three variables drive 90% of the price difference between one battery quote and another.
What do the major brands cost?
Market share figures are from the Ohm Analytics September 2026 Flash Report.
How do incentives reduce the price?
If you install a battery paired with solar, it qualifies for federal and state incentives. Under a third-party ownership agreement (lease or PPA), the financing company claims the federal credit and passes the savings through as a lower monthly payment. TPO now accounts for 55% of California solar deals and 65% in Arizona, according to Ohm Analytics.
California's Clean Power Alliance raised its Sun Storage rebate to $2,000 in October 2026. The Self-Generation Incentive Program (SGIP) may offer additional rebates depending on your utility territory and income level.
Is a battery worth the cost without solar?
A standalone battery without solar is a backup generator that runs on grid electricity. It protects you during outages but does not reduce your electric bill long-term. Paired with solar under NEM 3.0, a battery changes the economics. Solar exports earn 3.7 to 4.6 cents per kilowatt-hour. Self-consumption through a battery saves you 33 to 45 cents per kilowatt-hour, depending on your utility. That gap is where the payback lives.
What size battery do you need?
How long does a home battery last during an outage?
A 13.5 kWh battery running essential loads (refrigerator, lights, Wi-Fi, phone charging) lasts 10 to 14 hours overnight. Paired with solar, the panels recharge the battery the next morning, and the cycle repeats as long as the sun comes up.
Can I add a battery to my existing solar system?
Yes. Most modern inverter systems support battery retrofits. If your system uses Enphase microinverters or a SolarEdge inverter, adding a compatible battery is straightforward. SolarTech retrofits batteries onto existing systems across San Diego and throughout California and Arizona.
Do batteries qualify for the federal tax credit?
Batteries paired with solar qualify for federal tax incentives. Under a TPO agreement, the financing company claims the credit and lowers your payment. Under a cash or loan purchase, you claim it directly. Confirm specifics with your tax advisor.
Citations
Median battery price of $1,130/kWh and 9% YoY increase from EnergySage H1 2026 Pricing Report
Storage market share (Tesla ~70%, Enphase ~15%, Lunar ~5%) from Ohm Analytics September 2026 Flash Report
TPO share (55% CA, 65% AZ) from Ohm Analytics September 2026 Flash Report
CPA Sun Storage rebate increase to $2,000 confirmed October 2026
NEM 3.0 export rates of 3.7 to 4.6 cents/kWh from California Public Utilities Commission Net Billing Tariff schedule
Battery pricing ranges based on SolarTech project data in SDG&E, SCE, APS, and SRP territory
Take the Next Step with SolarTech Energy Systems
SolarTech Energy Systems installs battery backup systems for homes across California and Arizona with 100% in-house crews. Tell us about your home and we will size a battery system, model your savings under NEM 3.0, and show you the net cost after incentives. A solar specialist responds within one business day. Prefer to talk first? Call (858) 261-5642.