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Is Solar Worth It in Union City, California?

We analyzed Pacific Gas & Electric (PG&E) rate books, NREL irradiance data, and California tax codes to calculate the real ROI for homeowners in 94587.

Market Snapshot

Elec. Rate
$0.27/kWh
Sun Hours
5.83
Utility Pacific Gas & Electric (PG&E)
Tax Exempt Yes
Battery Required

Analyst Note: The "4kW Benchmark"

The analysis below uses a standardized 4kW system to provide a fair baseline comparison across cities. However, the average electric bill in Union City is $148.5.

Sky-high housing costs in the Bay Area make finding savings a priority. With its prime East Bay location getting ample sunshine, Union City homes are perfectly positioned to slash one of their biggest expenses: the monthly PG&E bill. As of 2026, adding a solar and battery system isn't just about going green—it's a strategic financial move to combat volatile electricity rates and gain energy independence.

Benchmark Cost Analysis

2026 Solar Installation Costs in Union City

A full solar and battery backup system is the new standard for California homeowners. In Union City, the average gross cost for this type of system is about $23,500. However, the upfront cost isn't what you'll actually pay. After the 30% federal tax credit, the net investment drops to approximately $16,450. While you could install solar panels alone for about $8,050 net, this approach severely limits your savings under the current utility rules, making it a less popular option.

Incentives & Tax Credits

The 30% Federal Tax Credit Makes it Affordable

The key to making these numbers work is the Residential Clean Energy Credit. This federal incentive allows you to claim 30% of your total project cost (panels, battery, and installation) as a dollar-for-dollar credit on your federal taxes. For a $23,500 system, that's a direct savings of $7,050. California also offers a property tax exclusion, ensuring your solar investment won't raise your property taxes.

Net Metering: Pacific Gas & Electric (PG&E)

Policy Status

NEM 3.0 (2023)

Battery Priority

Critical 🔋

Why a Battery is No Longer Optional with PG&E

Your utility, PG&E, operates under a policy called Net Billing (NEM 3.0). This means they pay you very little—around 6 cents per kWh—for any extra solar power you export to the grid during the day. But when you need to buy that power back in the evening, they charge you 5-6 times that amount. A battery solves this problem by storing your valuable solar energy so you can use it yourself during peak evening hours, avoiding PG&E's high costs entirely.

Projected Savings

Calculating Your Return on Investment

A solar and battery system in Union City is projected to save a typical household around $1,661 in the first year alone. As PG&E rates continue their upward trend, these savings grow annually. Based on the net cost of $16,450, the system pays for itself in just under 10 years. For the remaining 15+ years of the system's warranty, you'll be generating most of your own power for free, providing a significant long-term return.

Local Questions Answered

Will my solar panels work during Bay Area fog or on cloudy days?
Yes. Solar panels don't require direct, intense sunlight to produce electricity. While production is highest on clear days, they will still generate significant power during foggy or overcast conditions common in the Bay Area. Your system is sized based on annual production, accounting for varying weather.
My home is part of an HOA. Can they stop me from installing solar panels?
No. California Civil Code Section 714, also known as the Solar Rights Act, prohibits homeowners' associations from unreasonably restricting the installation of solar energy systems. They can impose reasonable aesthetic requirements, but cannot prevent you from going solar.
Is the federal tax credit a refund?
It's a nonrefundable tax credit, meaning it can reduce your federal tax liability to zero, but you won't get any extra back as a refund. However, if you don't have enough tax liability in one year to claim the full credit, you can carry the remainder forward to future tax years.

Calculate Your Solar Savings

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* Calculations based on Pacific Gas & Electric (PG&E) residential rates (0.27/kWh).

Data Transparency & Methodology

Estimates for Union City, 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 tax credit (ITC)

Investment Tax Credit — federal residential solar credit (e.g. 30% of qualified costs where applicable); rules change with statute—verify with a qualified advisor.

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.