For homeowners in Union City, high electricity rates from PG&E are a constant pressure. While California's strong sun makes solar a logical choice, the rules have changed. In 2026, the value of going solar is less about exporting power and more about using every kilowatt you generate yourself. This shift makes pairing solar panels with a home battery a powerful strategy for maximizing savings and energy independence.
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Open calculatorBenchmark Cost Analysis
Solar Panel & Battery Costs in Union City (2026)
Here are modeled cost estimates for a typical home in Union City. Since the default federal tax credit for residential solar expired at the end of 2025, these figures represent the gross cost before any potential local incentives.
- Solar-Only System (4.5 kW): The estimated upfront cost is around $11,475. This system is sized to offset a significant portion of an average local electricity bill.
- Solar + Battery System (4.5 kW panels, 10 kWh battery): The estimated cost for this combined system is $26,475. The battery adds outage protection and significantly increases your ability to use your own solar power after sunset.
These prices are modeled estimates and can vary based on equipment, installer, and your home's specific needs.
Incentives & Tax Credits
California Solar Incentives for 2026
While the era of major federal tax credits for solar has passed, California still offers a key financial benefit for homeowners:
Property Tax Exclusion for Active Solar Systems: When you install a solar system in California, the value it adds to your home is excluded from your property tax assessment. For systems installed through at least mid-2026, this means you get the benefit of a home improvement without the corresponding tax increase, saving you hundreds of dollars each year.
An owned solar system can also be an attractive feature for potential buyers, potentially supporting your home's resale appeal should you decide to sell in the future.
Net Metering: Pacific Gas & Electric Co
Net Billing (low export)
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How PG&E's Net Billing Affects Your Solar Savings
Union City is in Pacific Gas & Electric (PG&E) territory, which operates under a Net Billing Tariff (NBT). This is different from older net metering programs.
Here’s what it means in simple terms: the excess electricity your panels send to the grid is credited at a rate much lower than the price you pay for electricity you pull from the grid. Our model uses an estimated export value of $0.113 per kWh, while the retail rate is over $0.32 per kWh.
Because of this difference, the most effective way to save money is to use your solar power directly or store it in a battery for later. This strategy, known as self-consumption, is why adding a battery is now highly recommended for many California homeowners.
Projected Savings
Estimated Annual Electricity Savings
With PG&E's current rate structure, how you use your solar energy directly impacts your savings. Storing excess energy in a battery for evening use is often more valuable than sending it to the grid for a low credit.
- A solar-only system is projected to save a Union City household around $1,354 annually, leading to a payback period of about 7.7 years.
- Adding a 10 kWh battery boosts the estimated annual savings to $1,952. While the payback period extends to 10.5 years, the system provides greater long-term value and resilience against outages.
The nearly $600 increase in annual savings with a battery comes from avoiding PG&E's high-cost evening electricity rates. As grid electricity becomes more expensive over time, the value of this self-generated power is likely to increase, potentially improving the system's long-term return.