With average electric bills approaching $300 a month and SDG&E's high rates, many homeowners in National City are looking for financial relief. Rooftop solar provides a powerful solution, leveraging the region's abundant sunshine to generate clean, affordable electricity. But in 2026, the financial equation has evolved. The value of solar is now maximized by using your own power, making battery storage a central part of the conversation for achieving the best possible return on your investment.
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Open calculatorBenchmark Cost Analysis
2026 Solar Installation Costs in National City
The following are modeled costs for a typical solar installation in the National City area, reflecting pricing after the end of the federal residential tax credit.
- Solar-Only System (7.1 kW): A system of this size, designed to cover most of an average household's usage, has an estimated upfront cost of $18,105.
- Solar + Battery System (7.1 kW system with a 10 kWh battery): Pairing solar with storage brings the estimated total cost to $33,105. This combination delivers significantly higher annual savings and the crucial benefit of home backup power.
Investing in an owned solar system not only reduces your monthly bills but can also be a strong selling point for your home, potentially increasing its value in the competitive San Diego County real estate market.
Incentives & Tax Credits
Key Financial Benefits for Solar Owners in 2026
Even without a federal tax credit, California provides a supportive environment for homeowners adopting solar energy:
- Property Tax Exemption: Your property taxes in San Diego County will not increase because you installed solar. California's active solar system exclusion prevents the added value of your panels from being included in your home's assessed value.
- Avoiding High Utility Rates: The primary financial driver is offsetting SDG&E's electricity, which costs homeowners an average of $0.32 per kWh. Self-consuming your solar power is the most effective way to reduce your exposure to these high and often volatile rates.
Net Metering: San Diego Gas & Electric Co
Net Billing (low export)
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How Solar Credits Work with SDG&E (Net Billing)
It's important to understand that you don't get a one-for-one credit for exported solar power in National City. The system is designed to reward using your own energy.
- Highest Value is On-Site Use: When your solar panels generate electricity and your home uses it immediately, you get the full retail value because you're avoiding a purchase from SDG&E.
- Lower Value for Exports: Excess energy sent to the grid is credited at a much lower wholesale-based rate (modeled here at $0.11/kWh). This credit is significantly less than the retail price of electricity.
- The Battery Advantage: A home battery solves this imbalance. It stores your excess solar power during the day so you can use it at night, ensuring you get the full value from every kilowatt-hour your panels produce.
Projected Savings
Projected Annual Savings with Solar in National City
Under SDG&E's current rate structure, adding a battery to your solar system makes a dramatic difference in your annual savings. By storing your solar energy for use during expensive evening hours, you avoid selling it back to the grid for a low credit.
- A solar-only system is projected to save a National City household around $2,216 per year, with an estimated payback period of 7.5 years.
- By adding a battery, the estimated first-year savings jump to $3,308. The payback period is only slightly longer at 8.3 years, but the system generates over $1,000 in additional savings every year.
Solar offers a hedge against inflation. As SDG&E rates rise over the next decade, the power your system produces becomes more valuable, protecting your budget from future price shocks.