For homeowners in Danville, high electricity bills from Pacific Gas & Electric (PG&E) are a familiar reality, especially during hot Contra Costa County summers. While rooftop solar is a powerful way to reduce those costs, the rules have changed. In 2026, the value of going solar is less about sending power back to the grid and more about using every kilowatt-hour you generate yourself. This shift makes understanding the role of battery storage more important than ever.
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Estimated Solar System Costs in Danville (2026)
The cost of a solar installation depends on whether you include home battery storage. With PG&E's current net billing structure, adding a battery significantly improves the system's financial performance by increasing the amount of solar energy you use directly in your home.
- Solar Panels Only: A typical 6.5 kW solar system is estimated to cost around $16,575. This system is sized to offset a significant portion of an average local electricity bill.
- Solar Panels + Battery: Pairing that 6.5 kW system with a 10 kWh battery brings the estimated total cost to $31,575. This setup is designed to maximize self-consumption, storing daytime solar energy for use during expensive evening peak hours.
These figures represent the gross cost, as the default federal tax credit for residential solar installations is no longer available for systems placed in service in 2026.
Incentives & Tax Credits
California Solar Incentives for Danville Homeowners
While the federal tax credit landscape has changed, California still offers meaningful financial benefits that make going solar attractive.
The most significant incentive is the Active Solar Energy System Property Tax Exclusion. When you install a solar system, it can increase your home's value. However, under this state rule, your property taxes will not increase as a result of the added value from the solar system. This is a valuable, long-term financial benefit that directly reduces the cost of ownership. An owned solar system may also support resale appeal when it's time to sell your home.
Net Metering: Pacific Gas & Electric Co
Net Billing (low export)
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Understanding Export Rates with PG&E's Net Billing
Under the current rules, known as the Net Billing Tariff (NBT), PG&E compensates you for surplus electricity sent to the grid at a rate much lower than what you pay for electricity. For example, you might pay over $0.32 per kWh to buy power from the grid, but only receive around $0.11 per kWh for the excess power you export.
This is why battery storage is now strongly recommended. A battery lets you store your valuable solar energy instead of selling it to PG&E for a low price. You can then use that stored energy at night, avoiding the need to buy expensive power from the grid. This strategy of 'self-consumption' is the key to maximizing your savings in California's modern energy market.
Projected Savings
Projected Electricity Bill Savings
The primary benefit of an owned solar system is the reduction in your monthly payments to PG&E. The amount you save is directly tied to how much of your own solar energy you use.
- With a solar-only system, you could see an estimated annual savings of $1,970, leading to a payback period of approximately 7.7 years.
- Adding a battery storage system increases the estimated annual savings to $2,921. While the initial investment is higher, the payback period is only slightly longer at 8.8 years, and the long-term savings are substantially greater.
An owned solar system also provides a hedge against future utility rate increases. If grid electricity from PG&E becomes more expensive over time, the value of the energy you produce on your own roof increases, improving your return on investment.