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Is Solar Worth It in San Lorenzo, California?

We analyzed Pacific Gas & Electric (PG&E) rate books, NREL irradiance data, and California tax codes to calculate the real ROI for homeowners in 94580.

Market Snapshot

Elec. Rate
$0.27/kWh
Sun Hours
5.73
Utility Pacific Gas & Electric (PG&E)
Tax Exempt Yes
Battery Required

Analyst Note: The "4kW Benchmark"

The analysis below uses a standardized 4kW system to provide a fair baseline comparison across cities. However, the average electric bill in San Lorenzo is $148.5.

Paying PG&E for power in San Lorenzo feels like a losing battle, especially since their Net Billing (NEM 3.0) policy rolled out. The old model of selling excess solar power back for high credits is gone. Today, achieving true energy independence and significant savings requires a different approach: pairing solar panels with a home battery. Without one, you're giving your valuable solar energy to the grid for pennies.

Benchmark Cost Analysis

The Real Cost of a Solar & Battery System in San Lorenzo

While a basic solar-only system might look tempting at around $8,050 after credits, it fails to maximize savings under NEM 3.0. That's why most homeowners now choose a combined solar and battery system. The upfront cost for this setup is approximately $23,500. After claiming the 30% Federal Solar Tax Credit, the net cost drops to around $16,450. This investment is designed to provide energy security and slash your reliance on PG&E's volatile rates, offering a clear payback in about 10 years.

Incentives & Tax Credits

Federal & State Solar Incentives for 2026

California homeowners have powerful incentives to lower the cost of going solar. The primary one is the 30% Federal Solar Tax Credit, which deducts $7,050 from the total cost of a $23,500 solar and battery system. Additionally, the state's Property Tax Exclusion for solar systems ensures that your home's value increases without raising your property taxes—a significant benefit in Alameda County.

Net Metering: Pacific Gas & Electric (PG&E)

Policy Status

NEM 3.0 (2023)

Battery Priority

Critical 🔋

Understanding PG&E's NEM 3.0 Net Billing

Under NEM 3.0, the credit you receive for sending surplus power to PG&E is only about 5-8 cents per kWh. However, during peak evening hours, you might pay PG&E 40-50 cents or more for that same kWh. This massive difference is why solar-only systems no longer make financial sense. A battery lets you store your 5-cent energy and use it later, avoiding the 50-cent purchase. It puts you in control, not the utility.

Projected Savings

Locking in Your Energy Savings

A solar-plus-battery system dramatically changes your energy economics. By storing the free solar energy you generate during the day, you can use it to power your home during the expensive evening peak hours. This self-consumption strategy is key to defeating PG&E's Time-of-Use rates. For a typical San Lorenzo home, this leads to an estimated $1,641 in annual electricity savings, effectively zeroing out a large portion of your monthly utility bill and protecting you from future rate hikes.

Local Questions Answered

Do solar panels still work with the East Bay's marine layer fog?
Yes. Even with morning fog, solar panels produce power from indirect sunlight. California's high annual sun hours ensure that systems in Alameda County generate more than enough energy over the year to provide significant savings, especially when paired with a battery.
Why is a battery essential under PG&E's NEM 3.0?
NEM 3.0 slashed the value of exported solar energy by about 75%. Without a battery, you sell your valuable daytime solar power to PG&E for a pittance and are forced to buy expensive grid power at night. A battery lets you store your own power and use it when rates are highest, maximizing your savings.
What is the true payback period for solar and battery in San Lorenzo?
For a properly sized solar and battery system costing around $16,450 after the tax credit, the typical payback period is about 10 years. After that, the $1,600+ in annual savings represents a pure return on investment for the life of the system (25+ years).

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* Calculations based on Pacific Gas & Electric (PG&E) residential rates (0.27/kWh).

Data Transparency & Methodology

Estimates for San Lorenzo, California are produced by the SunCents Solar Engine (v1.2). We combine the following verified or standard industry sources:

Performance (PV production)

NREL PVWatts — modeled annual and hourly AC output (kWh), solar radiation, and system losses for a standardized array size so cities can be compared fairly.

nrel.gov

Electricity rates (tariffs)

U.S. Energy Information Administration (EIA) — state-level average retail electricity prices ($/kWh) and supporting series for economic context.

eia.gov

Incentives & programs

DSIRE — state and local rebates, net metering, and policy programs (summarized for readability; always confirm eligibility with a tax or solar professional).

dsireusa.org

Federal tax credit (ITC)

Investment Tax Credit — federal residential solar credit (e.g. 30% of qualified costs where applicable); rules change with statute—verify with a qualified advisor.

energy.gov

Utilities & interconnection

Where shown, local utilities (e.g. APS, PG&E, FPL, and other IOUs or munis) are mapped from public interconnection, tariff, or service-territory references so net metering and rider rules match your area—not generic national averages.