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How Much Do Solar Panels Cost in Brentwood CA? 2026 Prices & ROI

See 2026 solar panel costs for a Brentwood, CA home. Analyze ROI and savings with PG&E's current net billing rules, with and without a battery.

Market Snapshot

Elec. Rate
$0.323/kWh
Sun Hours
6.0
Utility Pacific Gas & Electric Co
Tax Exempt No
Battery Recommended
Data updated May 09, 2026

Analyst Note: Bill-based model (~6.4 kW)

Cost and savings sections below are sized to a typical system for this city’s average utility bill (~6.4 kW modeled). Typical monthly bill here: $258.4.

⚠️ Higher bills usually imply a larger system than the modeled size for full offset—confirm with the calculator below.

For homeowners in Brentwood paying high Pacific Gas & Electric (PG&E) rates, rooftop solar remains a powerful tool for managing electricity costs. With average bills often exceeding $250, generating your own power is appealing. However, under California's current net billing rules, the financial outcome depends heavily on using the energy you produce. Sending excess power back to the grid no longer offers the same 1-to-1 credit it once did, making home battery storage a key part of the modern solar equation.

Want the payoff timeline? Jump straight to the interactive calculator.

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Benchmark Cost Analysis

2026 Solar & Battery Costs in Brentwood

Without a federal tax credit, the upfront investment is the main consideration. The total cost depends on whether you include a home battery to store your solar energy. Here are the modeled estimates for a typical Brentwood home.

  • Solar-Only System (6.4 kW): The estimated gross cost is around $16,320. This system is designed to produce significant power during the day to offset household usage directly.
  • Solar + Battery System (6.4 kW panels, 10 kWh battery): The estimated combined cost is $31,320. Adding a battery increases the initial investment but dramatically improves your ability to use your own solar power after the sun sets, which is critical for maximizing savings with PG&E.

These figures are based on a typical local installation cost of $2.55 per watt. An owned solar system can also be a strong long-term feature, potentially supporting your home's resale appeal.

Incentives & Tax Credits

California Solar Incentives for 2026

While the long-standing federal solar tax credit is no longer available for new systems placed in service in 2026, California homeowners still benefit from important state-level policies that support the economics of going solar.

The most significant financial benefit is the Active Solar Energy System Property Tax Exclusion. This state rule prevents your property taxes from increasing due to the added value of your solar panel system. For a system costing over $30,000, this can translate into hundreds of dollars in property tax savings each year. This exclusion is a major factor in keeping solar financially attractive in California.

Net Metering: Pacific Gas & Electric Co

Policy Status

Net Billing (low export)

Battery Priority

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Understanding PG&E's Net Billing Tariff

Brentwood operates under the net billing tariff (NBT), sometimes called NEM 3.0. This structure is fundamentally different from older net metering programs. Here’s what you need to know:

  • Self-Consumption is Key: The electricity you generate and use at home directly offsets PG&E's high retail rate (e.g., $0.323/kWh). This is where you get the most value from your panels.
  • Low Export Rates: Any excess solar energy you send to the grid is credited at a much lower rate, based on its wholesale value. Our model uses a proxy rate of about $0.113/kWh, which is significantly less than what you pay for power.
  • Battery Value: A battery allows you to store your excess daytime solar power instead of exporting it for a low credit. You can then use that stored energy in the evening, avoiding the need to buy expensive power from PG&E. This load-shifting strategy is why the solar-plus-battery option shows much higher annual savings.

Projected Savings

Projected Electricity Bill Savings

The real difference between the two systems appears in the annual savings. Because PG&E charges high rates for electricity (around $0.323/kWh) but pays a low rate for your exported solar (modeled at $0.113/kWh), using your own power is far more valuable than selling it.

  • A solar-only system is projected to save approximately $1,970 per year, with an estimated payback period of 7.6 years. Savings are generated when your home uses solar power as it's produced.
  • A solar and battery system boosts annual savings to around $2,921 per year. The payback period is modeled at 8.8 years, but the system delivers nearly $1,000 more in savings each year by storing daytime solar energy for use during expensive evening peak hours. This also provides valuable backup power during grid outages.

If grid electricity from PG&E becomes more expensive over time, the value of offsetting that cost with your own stored solar power will only increase.

Local Questions Answered

Why is a battery so important for solar in Brentwood now?
Under PG&E's net billing tariff, the credit you receive for exported solar power is much lower than the price you pay for electricity from the grid. A battery lets you store your excess solar energy and use it yourself during peak evening hours, maximizing your savings by avoiding high-cost grid power instead of selling your solar for a low credit.
Is solar still a good investment in California without the federal tax credit?
Yes, for many homeowners it still makes financial sense, but the payback period is longer. With some of the highest electricity rates in the country, the savings from self-generating power are substantial. The key is to size a system correctly and strongly consider a battery to maximize the value of the energy you produce. The state's property tax exclusion also provides significant ongoing savings.
How can I find out the exact cost and savings for my home?
The numbers here are based on a benchmark system for a typical Brentwood home. For a precise estimate based on your roof, electricity usage, and PG&E bill, use the solar calculator below. It provides a personalized analysis without requiring a sales call.

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* Calculations based on Pacific Gas & Electric Co residential rates (0.323/kWh).

Data Transparency & Methodology

Estimates for Brentwood, California are produced by the SunCents Solar Engine (v1.2). We combine the following verified or standard industry sources:

Performance (PV production)

NREL PVWatts — modeled annual and hourly AC output (kWh), solar radiation, and system losses for a standardized array size so cities can be compared fairly.

nrel.gov

Electricity rates (tariffs)

U.S. Energy Information Administration (EIA) — state-level average retail electricity prices ($/kWh) and supporting series for economic context.

eia.gov

Incentives & programs

DSIRE — state and local rebates, net metering, and policy programs (summarized for readability; always confirm eligibility with a tax or solar professional).

dsireusa.org

Federal incentives

SunCents calculator net cost does not include a federal residential tax credit. Incentive rules change—check DSIRE, IRS/DOE guidance, and a tax professional before relying on any credit.

energy.gov

Utilities & interconnection

Where shown, local utilities (e.g. APS, PG&E, FPL, and other IOUs or munis) are mapped from public interconnection, tariff, or service-territory references so net metering and rider rules match your area—not generic national averages.