Is going solar in Rancho Penasquitos still a good investment in 2026? With high electricity costs from San Diego Gas & Electric (SDG&E) and abundant sunshine, rooftop solar remains a popular home upgrade. However, the financial equation has changed. The federal tax credit for homeowners has ended, and SDG&E's export compensation rules make it critical to understand how to get the most value from the energy your panels produce.
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How Much Do Solar Panels Cost in Rancho Penasquitos (2026)?
For a typical home in the Rancho Penasquitos area, a solar system is sized to offset a significant portion of the household's electricity bill. The costs below are modeled estimates for 2026 and do not include any federal tax credits.
- Solar-Only System (7.1 kW): The estimated gross cost is $18,105. This setup is designed to cover your electricity needs during sunny hours.
- Solar + Battery System (7.1 kW solar with 10 kWh battery): A combined system is estimated at $33,105. The battery adds significant value by storing excess solar power, giving you more control over your energy and savings.
Beyond the bill savings, an owned solar system can be a smart long-term investment, potentially enhancing your home's value and appeal to future buyers.
Incentives & Tax Credits
What Solar Incentives Are Available in 2026?
With the federal residential solar tax credit no longer in effect, California homeowners rely on other valuable state-level benefits. The most significant is the property tax exclusion.
- California Property Tax Exclusion: When you install a solar system, its value is excluded from your property tax assessment. This state-level incentive ensures that your investment in clean energy doesn't lead to a higher tax bill. This exclusion is active for systems installed through at least the middle of 2026.
Your primary financial gain comes directly from energy savings, making it crucial to design a system that maximizes self-consumption.
Net Metering: San Diego Gas & Electric Co
Net Billing (low export)
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SDG&E's Net Billing: Why Self-Consumption Matters
For customers of San Diego Gas & Electric, the current solar program is a net billing tariff. This means there's a big difference in value between the electricity you buy and the excess electricity you sell.
You might pay SDG&E over 32 cents per kWh for electricity, but when your solar panels produce more than you need and export it, you may only receive a credit worth around 11 cents per kWh. This difference makes it financially disadvantageous to simply send your extra power to the grid. Instead, storing it in a battery for your own use at night saves you from buying the high-cost power, delivering a much better return.
Projected Savings
Projected Monthly and Annual Savings
The biggest factor in your savings is how much of your own solar power you use. Storing energy in a battery to avoid buying expensive power from SDG&E at night is now the most effective strategy.
- A solar-only system is modeled to save approximately $2,216 per year. The system's payback period is estimated at 7.5 years.
- By adding a 10 kWh battery, you can use stored solar energy during peak evening hours. This increases the estimated annual savings to $3,308. The payback for the combined system is about 8.3 years, but it delivers greater long-term value and energy resilience.
Protecting your budget from future SDG&E rate increases is another key benefit. As grid power gets more expensive, the value of your rooftop solar generation grows.