Cost of Solar Panels With a Battery in 2026: Prices, Math and How to Compare Quotes

The cost of solar panels with a battery is often in the mid-$30,000s before incentives for a typical home. Using EnergySage's 2026 data, an 8 kW solar system at the $2.57-per-watt median is about $20,560, and a 13.5 kWh battery at $1,130 per kWh is about $15,255, for roughly $35,800 in total; NLR's modeled price for a similar 8 kW solar plus 13.5 kWh storage system was $4.59 per watt in 2024 dollars, or about $36,700 (our math).

Your price can be much lower or higher depending on battery size, brand, how much of the house you back up and where you live. Below are dated price sources, the math, and what to check on a quote.

Key takeaways

• EnergySage reported median solar quotes of $2.57 per watt and battery quotes of $1,130 per kWh in the first half of 2026.
• EnergySage's battery guide (July 2026) puts a typical 13.5 kWh battery at about $15,647 installed before incentives, and whole-home backup at about $34,000.
• Berkeley Lab found that among cash purchases, paired solar plus storage systems were $2.1 per watt of solar higher than solar alone in 2025.
• The federal 30% residential credit, which covered batteries of 3 kWh or more, is not allowed for expenditures made after December 31, 2025.
• Some states and utilities still pay for batteries, which can change the math a lot.

Solar panels with battery cost: 2026 price data

Measure	Figure	Source and date
Median solar quote	$2.57 per watt	EnergySage, H1 2026
Battery quote price	$1,130 per kWh	EnergySage, H1 2026
Typical 13.5 kWh battery, installed	About $15,647	EnergySage, July 2026
Whole-home backup	About $34,000	EnergySage, July 2026
8 kW solar only, modeled market price	$2.95 per watt (about $23,600, 2024 dollars)	NLR benchmark via DOE, Q1 2025
8 kW solar + 13.5 kWh storage, modeled market price	$4.59 per watt (about $36,720, 2024 dollars)	NLR benchmark via DOE, Q1 2025
Extra cost of pairing storage, cash systems	$2.1 per watt of solar higher	Berkeley Lab, 2025 installs

Dollar totals for the NLR benchmark are our multiplication of the per-watt figure by 8,000 watts. Berkeley Lab notes that about 80% of its paired solar plus storage price data comes from California, so its figure leans toward that market.

How to calculate the cost of solar with a battery

Price the two parts separately, then add them. This also makes quotes easier to compare.

1. Solar: system size in watts times price per watt. Example: 8,000 W x $2.57 = $20,560.
2. Battery: usable capacity in kWh times price per kWh. Example: 13.5 kWh x $1,130 = $15,255.
3. Add extras listed separately, such as a backup gateway, critical load panel or main panel upgrade.
4. Subtract incentives you have confirmed in writing for your state or utility.

In this example the total is about $35,815 before extras and incentives. Tesla's own pricing guide recommends dividing the total cost, minus any battery cost, by the system's watts when comparing installers. That keeps the battery from hiding an expensive solar price.

Berkeley Lab found the median residential battery was 13.5 kWh and the median solar system was 7.7 kW in 2025, so the example above is close to a typical paired system. Use our solar panel calculator to size the solar side for your usage.

Battery prices by brand

EnergySage's July 2026 guide lists average quoted prices on its marketplace by brand. Sizes shown are the typical size it used.

Brand	Average price per kWh	Typical size	Estimated cost, no incentives
Tesla	$967	13.5 kWh	$13,055
Enphase	$1,429	10 kWh	$14,290
FranklinWH	$1,232	15 kWh	$18,480
EG4	$1,149	12.9 kWh	$14,822
Sigenergy	$1,028	15.4 kWh	$15,831

Brand averages mix many installers and system designs, so treat them as a guide, not a quote. See how much does a home battery cost for more detail.

What drives the cost of solar plus storage

• Backup scope. Backing up a few essential circuits costs far less than whole-home backup, which EnergySage puts at about $34,000 for the battery side.
• Battery size and count. EnergySage notes batteries are less granular to size than solar panels, so you often buy in large steps.
• Inverter design. If the battery lacks a hybrid inverter, EnergySage says a separate inverter can add a couple thousand dollars.
• Electrical work. A critical load panel, smart panel or main panel upgrade may be needed.
• New install vs retrofit. EnergySage says adding a battery to existing solar costs more in labor and wiring than installing both together.
• Labor and soft costs. EnergySage says equipment is about 50 to 60% of a battery's price, with labor and planning making up most of the rest.

Incentives that can lower the cost of solar with a battery

The federal credit used to cover batteries of at least 3 kWh, but it is not allowed for expenditures made after December 31, 2025, and the IRS treats the expenditure as made when installation is complete. State and utility programs still exist in some places. EnergySage's battery guide names a few examples:

• California: the Self-Generation Incentive Program can reach over $1,000 per kWh for eligible customers.
• Connecticut: the Energy Storage Solutions program offers up to $16,000.
• Utility programs: some utilities, including Eversource and National Grid, offer ConnectedSolutions payments for letting them use your battery during peak times.

Eligibility rules and funding change often, so confirm with the program before you sign. Our guide to battery storage incentives tracks more programs.

How to compare solar and battery quotes

Paired quotes are harder to compare than solar-only quotes because the battery can hide a high solar price. Use this checklist:

1. Split the price. Ask for the solar and battery portions as separate line items, then work out price per watt for solar and price per kWh for the battery.
2. Check usable capacity. Compare kWh of usable storage, not just the number of units.
3. Look for the backup hardware. EnergySage notes most home batteries cannot run everything, so specific circuits often go on a critical load panel, though some brands use load management devices instead. If your design needs one and the quote does not list it, ask what it will cost.
4. Compare chemistry and warranty. EnergySage notes NMC batteries are more power-dense, while LFP batteries are more efficient, longer-lasting and slightly safer. Read the warranty years and capacity guarantee.
5. Compare cash and financed prices. Berkeley Lab found loan-financed systems were priced considerably higher than cash systems, possibly because loan fees are rolled into the upfront price.
6. Confirm incentives in writing. Do not let a quote count a federal credit that has ended for homeowners.

Getting at least two or three paired quotes is the simplest way to see whether one installer's battery price is out of line.

Is a battery worth the extra cost?

Whether a battery pays off depends on your utility's rate design, how it credits exported solar, any battery program you can join, and how much you value backup power during outages. EnergySage reported that 76% of shoppers expressed interest in storage in the first half of 2026, but the storage attachment rate was 31%. Berkeley Lab found residential battery attachment rose from 25% of installs in 2024 to 37% in 2025.

Read are solar batteries worth it to work through your own case.

Next steps

Ask every installer to price the solar and the battery separately, then upload the quotes to our solar quote checker to see whether the solar portion is fairly priced. Check local solar prices on our solar panels by state pages.