With average monthly electric bills near $260 and high PG&E rates, many homeowners in Lathrop are looking for ways to reduce energy costs. Rooftop solar is a proven solution, but making it work financially in 2026 requires a modern approach. The key is maximizing self-consumption—using the solar power you generate directly in your home—because selling surplus power back to the grid now provides much lower returns. This makes pairing solar panels with a battery the smartest path to significant savings.
Get a quick estimate tied to local rates and sun hours.
Open calculatorBenchmark Cost Analysis
Estimated 2026 Solar Costs in Lathrop
The following costs are modeled for a 6.5 kW system, sized to cover most of an average Lathrop household's electricity needs. It's important to remember that the 30% federal tax credit for homeowners expired at the end of 2024, so these figures represent the gross cost.
- 6.5 kW Solar-Only System: Estimated gross cost of $16,575.
- 6.5 kW Solar System with 10 kWh Battery: Estimated gross cost of $31,575.
Choosing to add a battery increases the initial investment, but as the savings data shows, it's essential for getting the most value out of your solar panels under current utility rules.
Incentives & Tax Credits
Key Financial Benefits for Lathrop Solar Owners
Even without a federal tax credit, California provides valuable incentives that lower the effective cost of going solar.
- Property Tax Exclusion: Your property taxes will not go up because of the value added by your solar system. This state-level exclusion is a major benefit that applies to qualifying systems.
- Local Utility Programs: While not a direct rebate, PG&E's net billing program enables grid connection. The structure of this program, with its low export rates, is what makes battery storage so financially compelling for new solar owners.
Net Metering: Pacific Gas & Electric Co
Net Billing (low export)
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How PG&E's Net Billing Affects Your Solar ROI
The solar landscape in California has shifted away from the old 1-for-1 net metering. Under the current Net Billing Tariff (NBT), any excess solar energy you send to the grid is credited at a much lower rate—modeled here at around $0.11/kWh—than the $0.32/kWh you pay to buy electricity.
This means a solar-only system will often sell its valuable mid-day energy for pennies, only for the homeowner to buy expensive grid power a few hours later. A battery breaks this cycle. It stores that excess mid-day energy so you can use it to power your home through the evening, drastically cutting your reliance on PG&E and maximizing your savings.
Projected Savings
Potential Annual Savings with Solar in Lathrop
Your savings come from avoiding PG&E's high retail rate of $0.32/kWh. In a net billing environment, the more of your own solar power you can use, the more you save. A battery is the tool that makes this possible, especially during evenings when your panels aren't producing.
- With a solar-only system, you could expect to save around $1,970 per year. The estimated payback period is 7.7 years.
- By adding a 10 kWh battery, the modeled annual savings jump to $2,921. The payback period is slightly longer at 8.8 years, but the system delivers nearly $1,000 more in savings each year.
Over the long term, protecting your budget from rising utility costs can significantly enhance the value of your investment. An owned solar system can also be an attractive feature for potential homebuyers if you decide to sell.