How Much Does a Solar System Cost in Duarte in 2026?
With Southern California Edison (SCE) electricity rates among the highest in the country, many Duarte homeowners are looking for ways to reduce their average monthly bill of nearly $300. Rooftop solar is a powerful tool, but the investment and savings depend heavily on the system you choose. In 2026, the question isn't just about panels—it's about pairing them with a battery to get the most value from every ray of sun hitting your roof.
Skip ahead to a personalized savings estimate for your home.
Open calculatorBenchmark Cost Analysis
2026 Solar & Battery Cost Estimates for Duarte
For a typical home in Duarte, a system is sized to offset the majority of the electricity bill. Based on a local cost of approximately $2.55 per watt, here are the estimated upfront costs for two popular configurations:
- 7.2 kW Solar-Only System: The estimated gross cost is $18,360. This system is designed to generate enough power to match the home's annual usage.
- 7.2 kW Solar System + 10 kWh Battery: The estimated gross cost is $33,360. Adding a battery allows you to store excess solar power generated during the day for use at night, which is critical for maximizing savings under SCE's current rules.
Beyond the monthly bill savings, an owned solar system can be a useful long-term home-value feature, adding to its appeal for future buyers.
Incentives & Tax Credits
California's Key Solar Benefit for Duarte Homeowners
As of 2026, the major federal tax credits for residential solar have expired. However, California still provides a powerful incentive that protects your investment:
Property Tax Exclusion: When you install a rooftop solar system in Duarte, the value it adds to your home is excluded from your property tax assessment. This means you get the benefit of a more valuable, energy-efficient home without the burden of a higher annual tax bill from Los Angeles County. This state-level protection makes the financial case for solar much stronger.
The main economic driver is now the direct offset of high SCE bills, making self-consumption the most important factor for a strong return on investment.
Net Metering: Southern California Edison Co
Net Billing (low export)
Recommended 🔋
Why SCE's Net Billing Rules Make Batteries a Smart Move
Southern California Edison operates under a Net Billing Tariff (NBT), which has changed how solar savings are calculated. The old 1-for-1 net metering is gone.
- High Value for On-Site Use: The solar power you generate and use at home is worth the full retail rate you would have paid SCE, currently around $0.32/kWh.
- Low Value for Exports: When your system produces more power than you can use, the excess is sent to the grid. SCE buys this power at a much lower 'avoided cost' rate, modeled here at about $0.11/kWh.
This difference in value is why a battery is so highly recommended. Storing your excess solar power to use at night is worth nearly three times more than selling it to SCE for a small credit.
Projected Savings
Projected Savings and Payback Period in Duarte
Installing solar is about long-term financial benefits. With SCE's high rates, the savings from self-generating your power are substantial. The addition of a battery dramatically increases those savings by letting you avoid buying expensive grid power in the evenings.
- A solar-only system is modeled to save a Duarte homeowner around $2,216 per year, leading to a payback period of about 7.6 years.
- A solar + battery system boosts those annual savings to an estimated $3,308. The payback period is only slightly longer at 8.3 years, making the battery a very strong financial choice. It delivers over $1,000 in additional savings each year for a minimal extension in payback time.
Long-term utility inflation can also improve the value of your solar investment, as each kWh you generate will offset increasingly expensive grid power.