Tired of High SDG&E Bills in San Marcos?
With average electric bills topping $300 and SDG&E rates among the highest in the nation, many San Marcos homeowners are looking for a more predictable way to manage energy costs. Rooftop solar offers a direct path to reducing that monthly bill. Under California's 2026 rules, the key to maximizing solar's value is using the power you generate yourself. Pairing solar panels with battery storage has become the most effective way to slash your reliance on the grid and protect against future rate increases.
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Estimated 2026 Solar Installation Costs in San Marcos
An investment in solar is measured against years of avoided utility payments. For a typical San Marcos home, a 7.8 kW system is sized to cover average electricity needs. The costs below reflect pricing for systems installed in 2026, without a federal tax credit.
- Solar Panels Only (7.8 kW): The estimated upfront cost is $19,890. This system generates significant power during daylight hours to offset your home's consumption.
- Solar Panels + 10 kWh Battery: A combined system is estimated at $34,890. This setup provides both daytime power and stored energy for use during expensive evening peak hours, delivering the most comprehensive bill reduction.
Incentives & Tax Credits
California's Pro-Solar Policies in 2026
The financial case for solar in San Marcos is supported by powerful state-level incentives. The most impactful is California's property tax exclusion for solar systems. This ensures that when you invest in solar, your property taxes won't go up, even though an owned system can add to your home's resale appeal.
While the 30% federal tax credit is no longer a default incentive for new systems, the core value proposition remains strong due to SDG&E's high rates. Your primary financial benefit is the immediate and ongoing reduction of your monthly electricity costs.
Net Metering: San Diego Gas & Electric Co
Net Billing (low export)
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How SDG&E's Net Billing Program Works
Under the current net billing structure, the value of your solar energy depends on when you use it. When your panels produce more electricity than your home needs, the excess is sent to the grid. SDG&E credits you for this exported power at a rate much lower than the retail rate you pay for electricity. This makes daytime exports less valuable. A battery solves this by storing that excess solar power, allowing you to use it during the evening when grid power is most expensive, which dramatically increases your savings.
Projected Savings
Potential Savings with a Home Solar System
The financial return from solar in San Diego County comes from avoiding the purchase of expensive grid power, which costs around $0.32 per kWh. By generating your own electricity, you can significantly reduce what you owe SDG&E each month.
- A solar-only system is modeled to save a homeowner approximately $2,438 per year, leading to a payback period of about 7.5 years.
- By adding a battery, you can use stored solar energy at night instead of buying it from the grid. This boosts annual savings to around $3,657 and results in a payback period of just 8.0 years for the entire system.
These savings can grow over time. As utility rates continue to climb, the value of the energy your system produces increases, improving your long-term return on investment.