Are Solar Batteries Worth It? What a Home Battery Really Saves in 2026

Are solar batteries worth it? In 2026 the honest answer is "sometimes, and it depends mostly on your utility." A battery pays off when exported solar earns little and evening power costs a lot, as in California, or when outages are frequent and costly for you. Under full one-for-one net metering, a battery rarely saves enough to justify its price.

This guide walks through what batteries cost now that the federal credit has ended for owners, the three ways a battery creates value, and worked numbers for California, Arizona, Texas and a full net metering state.

How much does a solar battery cost in 2026?

A single home battery adds thousands of dollars to a solar project, and more if your electrical panel needs work. Berkeley Lab's data shows paired solar-plus-storage systems cost a median $2.10 per watt more than solar alone among cash purchases installed in 2025.

That figure comes from Berkeley Lab's U.S. Distributed Solar and Storage 2026 Data Update (opens in a new tab) (August 2026). On the median 2025 residential system of 7.7 kW, $2.10 per watt works out to about $16,170 of extra cost. The same report put the median paired battery at 13.5 kWh. About 80% of the paired pricing data came from California, so treat it as a guide, not a quote.

The big 2026 change is the tax credit. The IRS confirms (opens in a new tab) that the 30% Residential Clean Energy Credit does not apply when installation is completed after December 31, 2025, even if you paid in 2025. As of October 2026, a homeowner who buys a battery pays the full price unless a state or utility program helps. A battery owned by a leasing company may still earn that company a business credit under section 48E, which can show up as a lower monthly payment.

What are the three ways a battery creates value?

A battery earns its keep in three ways: shifting solar from low-value hours to high-price hours, keeping essential circuits running during outages, and earning payments from utility programs that borrow its stored energy. Most homes that come out ahead stack at least two of the three.

1. Bill savings from shifting energy. The battery charges from solar at midday, when exports earn little, and discharges in the evening peak, when grid power costs the most. The value per kWh is roughly the peak price you avoid minus what that stored kWh would have earned as an export, minus efficiency losses.
2. Backup power. Grid-tied solar panels shut off during a blackout for line-worker safety. A battery with the right gateway or transfer switch keeps chosen circuits on.
3. Program payments. Some utilities pay you to let them discharge your battery during grid peaks. Austin Energy's Power Partner Battery pilot (opens in a new tab), for example, pays $500 upfront plus $75 per kW per year, with up to 40 events a year outside grid emergencies.

When is a battery worth it for bill savings?

A battery saves real money when the gap between your peak price and your export credit is wide, and almost nothing when the gap is narrow. That is why the same battery can pay back in about a decade in California and never pay back in a state with full retail net metering.

California is the clearest case. Under the Net Billing Tariff (opens in a new tab), most solar exports earn a few cents per kWh, while PG&E's E-ELEC rate charges about 55.2¢ per kWh from 4 to 9 p.m. in summer and 33.4¢ off-peak, according to its current tariff sheet (opens in a new tab). Berkeley Lab's 2025 data update (opens in a new tab) found California's residential storage attachment rate jumped from 14% in 2023 to 57% in 2024 after the rule change.

Here is how the same 13.5 kWh battery, priced at $15,000, performs under different rules. Each row uses our time-of-use battery formula with 90% round-trip efficiency.

The Arizona export value is APS's 2026 Resource Comparison Proxy rate from its RCP tariff (opens in a new tab); the 25¢ peak is an assumption for illustration. The Texas row uses a price close to the state's 16.06¢ residential average for January to July 2026 from the EIA (opens in a new tab) and an assumed buyback credit. Plug in your own rates below.

Worked example: a California home on net billing

A PG&E customer on net billing with a 6 kW system and a 13.5 kWh battery saves roughly $1,050 to $1,350 more per year than with solar alone, depending on the method. At $15,000 for the battery, that is a simple payback of about 11 to 14 years, which can be close to or beyond the battery's warranty term.

Two of our tools look at this from slightly different angles:

• The time-of-use view. Shifting 13.5 kWh a day for 300 days, buying back 12.15 kWh of peak power at 45¢ and giving up 13.5 kWh of exports at 7¢, saves $4.52 per cycle, or about $1,357 a year. Payback is about 11.1 years.
• The whole-home view. In our NEM 3.0 calculator, a home using 9,000 kWh with 9,300 kWh of solar, 35% direct self-use, a 40¢ average import price and a 7¢ export credit saves about $1,725 a year with solar alone and $2,782 with the battery. The battery adds about $1,057 a year, because it can only shift as much energy as the home uses in the evening.

The second number is lower and usually more realistic, because a battery cannot save money on power you would not have used anyway. Our full California NEM 3.0 guide covers export credits, the nine-year lock-in and the new fixed charge in detail.

Is a battery worth it for outage protection?

For outages, the value is personal: it depends on how often you lose power, for how long, and what an outage costs you in spoiled food, lost work, medical needs or a flooded basement. A battery is worth more where long outages are common and less where they are rare and short.

Outages are getting longer on average. The EIA (opens in a new tab) reported that U.S. customers averaged 11 hours without power in 2024, nearly twice the average of the prior decade, with major hurricanes causing 80% of the hours. South Carolina customers averaged nearly 53 hours.

How long a battery lasts depends on what it runs. Using our battery backup runtime calculator defaults (starts full, keeps a 10% reserve, 90% inverter efficiency), a 13.5 kWh battery delivers about 10.9 kWh:

• At a 400-watt average load (fridge, lights, internet, phone charging), about 27 hours.
• At 800 watts (add a TV, microwave use and a gas furnace fan), about 13.7 hours.
• At 1,500 watts (add a window AC or well pump cycling), about 7.3 hours.

Solar can recharge the battery on sunny days, which stretches a multi-day outage. Size your backup by choosing circuits in the solar battery size calculator, and read our home battery backup guide for whole-home versus partial-home setups.

Battery or standby generator?

If backup is your only goal, a standby generator is often cheaper to buy and runs longer, while a battery is quiet, needs little maintenance and can also cut bills. Over 10 years the costs are often close, so the deciding factors are outage length, fuel access and whether bill savings exist where you live.

Using our battery vs generator calculator with a $15,000 battery and its default generator inputs ($12,000 installed, $250 a year of maintenance, 24 outage hours plus 26 self-test hours a year at 1.5 units of fuel per hour and $2.50 per unit), the generator costs about $16,375 over 10 years versus $15,000 for the battery. If the battery also saves $1,357 a year on bills, as in the California example, its net 10-year cost drops to about $1,430.

Which incentives still help pay for a battery?

As of October 2026, help comes from states and utilities, not federal credits for owners. Program money is limited and changes often, so check the program page before you sign. In California, rebates narrowed sharply at the end of 2025.

California's Self-Generation Incentive Program closed its ratepayer-funded budgets, including Small Residential Storage, to new submissions after December 30, 2025, according to program administrator notices (opens in a new tab). Income-qualified AB 209 equity budgets stayed open, with new applications due by June 30, 2028, and waitlists in some areas. Elsewhere, utility programs such as Austin Energy's pay battery owners for grid support. Our solar incentives by state guide lists the state programs we have verified.

How do you decide if a battery is worth it for you?

Work through your utility rules first, then your outage risk, then the price. A battery is a strong buy when at least two of these point the same way, and a weak one when only "peace of mind" is on the list and the price is high.

1. Find your export credit and peak price. Look at your rate plan and your utility's solar tariff. If they are nearly the same, savings will be small.
2. Estimate cycles. Daily shifting (about 250 to 300 cycles a year) is realistic only where peak prices apply every day.
3. Run the numbers. Use the time-of-use battery calculator with your rates and the quoted price.
4. Value your outages honestly. Count recent outage hours and what they cost you.
5. Check programs. Ask your utility about battery rebates or peak-event payments.
6. Compare with a generator if backup is the main goal.
7. Get itemized quotes that separate the battery, gateway, panel upgrades and labor.

If you live where full retail net metering still applies, the grid is already your cheapest battery, so buy storage only for backup or program payments. If you live under California's net billing or a similar low export rate, a right-sized battery is often part of the best solar design.