Solar Earth Inc.

Is Solar Worth It In California?

In the radiant landscape of California, where the sun’s embrace is constant, the question arises: Is solar worth it in California?

According to data from World Population Review, California ranks as the 5th sunniest state in the U.S. The adoption of residential solar panels has reached unprecedented levels. Renewable energy installations set new records in 2021, surpassing nearly 295GW, a 6% increase from the previous peak in 2020. Solar energy is the preferred choice among homeowners seeking renewable energy due to its installation convenience and cost-effectiveness.

California’s Climate

California’s climate exhibits considerable diversity, ranging from scorching desert conditions to alpine tundra. Many areas along the coastline, Sierra Nevada foothills, and Central Valley experience a Mediterranean climate. This entails warm and dry summers and cooler and wetter winters.

The influence of the nearby ocean tempers extreme temperatures, leading to milder winters and cooler summers along the coastal regions. This cooling effect of the ocean is particularly beneficial for solar panel efficiency, as panels tend to be less effective under extremely hot conditions.

The prime months for solar energy production in California span from May to October. During this period, clear skies and high temperatures are frequent occurrences.


Hence, The Pertinent Question Remains: Is Solar Worth It In California?

Imagine an average installed residential solar system cost of $11,235, factoring in the advantageous 30% federal solar tax credit. This translates to a mere $2.68 per watt, representing a budget-friendly gateway to renewable energy. It’s important to acknowledge that solar prices can fluctuate depending on your specific geographic location within the state. Our accompanying graph visualizes the average installed solar system costs tailored to your corner of California.

With an average Global Horizontal Irradiation (GHI) of 5.2kWh/m2, California is one of the prime locations in the United States for residential and commercial solar panel installations. Therefore, for Californians, investing in solar energy is strongly recommended.

The state’s abundance of sunshine, with approximately 284 sunlit days per year on average, underscores the viability of solar panels in California. Solar panels prove advantageous if your home’s roof offers ample space and is not heavily shaded.

To accurately assess the viability of solar panel installation as an investment in California, it’s important to consider the overall climate of the region.

The Solar Revolution Continues


Over the past decade, solar panels have experienced an astonishing price reduction of over 80%. This drop, coupled with the ongoing support of the 30% federal tax credit and the net metering law, underlines the enduring value of solar panels. This investment promise outshines traditional market returns and property investments significantly.

Seeing Beyond the Numbers


To gauge the true worthiness of solar panels, it’s prudent to consider the levelized cost per kWh of power over the next 25 years, both with and without solar panels. This visual representation emphasizes solar panels’ substantial savings potential to your financial portfolio.

Federal Tax Credit


In the realm of incentives, the federal tax credit shines brightest. This credit, currently at 30% of your total solar system expenses, offers a tangible way to recoup a substantial portion of your investment. Moreover, any unclaimed credit can be rolled over into subsequent years, ensuring you make the most of this advantageous scheme.

NEM : (Net Metering)


California’s recent adoption of solar billing regulations, known as NEM 3.0 or Net Billing, marks a transformative phase for solar customers under investor-owned utilities. Although homeowners can still harness self-generated solar energy to offset their energy bills, the magnitude of savings has experienced a modest adjustment compared to the previous billing structure.

Calculating Peak Sun Hours in California

Determining the number of peak sunlight hours a region receives is crucial, as it directly influences the number of solar panels required for optimal energy production and the overall feasibility of solar panel installation.

California boasts an approximate solar irradiance of 5.2 kWh/m2. This substantial solar exposure further underscores the potential for solar energy utilization.

Calculating Solar System Costs in California

Several factors influence the cost of a solar panel system in California:

  • Electricity consumption per month.
  • Number of peak sunlight hours.
  • Choice of solar panels (monocrystalline or polycrystalline).
  • Selected solar brand.
  • To begin, it’s necessary to determine your monthly electricity consumption. This can be achieved by dividing your annual kWh usage by 31 to obtain the monthly consumption. As per the U.S. Energy Information Administration (EIA), the average monthly consumption in California is 542 kWh.

Considering the daily peak sunlight hours of around 5.2 in California, the choice of solar panels becomes pivotal. Monocrystalline panels, though pricier, are known for their efficiency, while polycrystalline panels offer a more budget-friendly alternative.

The solar brand you opt for will also influence the overall system cost. The cost per watt varies among solar manufacturers in the U.S.

Solar Panel Payback Period in California

The period required for solar panels to pay for themselves hinges on your monthly electricity consumption and the size of the solar system. California’s average monthly electricity consumption is around 542 kWh, with an average cost of approximately 26.77 cents per kWh.

Assuming a 3.6kW (3600 watts) solar system is needed to offset this consumption, the initial cost would be $10,800 before tax incentives. With a 30% tax credit available for solar installations, the cost reduces to $7,560.

Dividing this cost by the average monthly electricity bill of $145 results in a payback period of 52 months, or about 4.33 years. Given that solar panels typically last 25-30 years, this translates to 25 years of free electricity and potential savings of approximately $43,500.

Notably, this calculation must account for the anticipated increase in utility electricity costs over the next 25 years.

A deeper dive into California Net Billing reveals crucial insights


Adopting Time of Use rate plans, with peak period electricity costs results in moderated solar savings.

Excess energy credits are valued at approximately $0.05 per kWh, substantially lower than the average electricity cost of around $0.30 per kWh.

Empowering Dreams: PACE Financing


California extends a compelling avenue for homeowners aspiring to transition to solar energy: PACE financing. This dynamic program opens doors to fulfilling your solar dreams by offering accessible financial pathways.

Preserving Your Property Value


In a strategic move, California offers a property tax exemption for solar panel systems. While adding solar panels augments your property’s value, this exemption ensures that an augmented tax burden doesn’t accompany this enhancement. This favorable policy is set to prevail until 2026.

A Tapestry of Incentives

California’s solar tapestry is woven with diverse incentives, each illuminating a unique pathway toward sustainability:

  • Residential Clean Energy Tax Credit (Federal)
  • Disadvantaged Communities – Single-Family Solar Homes (DAC-SASH) program (Residential)
  • LADWP – Net Metering (Utility)
  • Self-Generation Incentive Program (State)
  • Property Tax Exclusion for Solar Energy Systems (State)
  • City of San Francisco – Low-Income Solar Inverter Replacement Program (City)
  • Net Billing (NEM 3.0) (State)
  • Western Riverside Council of Governments – HERO Financing Program (Local)
  • Sonoma County – Energy Independence Program (Local)
  • Silicon Valley Power – Low Income Solar Grant Program (Utility)

Customized Solar Panel Installation Costs

Here’s a glimpse into the average cost of solar panel installation in California, tailored to your system size:

System Size

Cash Purchase (After Tax Credit)

Financed Purchase (After Tax Credit)






















Assessing the Investment

In a strategic move, California offers a property tax exemption for solar panel systems. While adding solar panels augments your property’s value, this exemption ensures that an augmented tax burden doesn’t accompany this enhancement.

Ultimately, deciding to invest in solar panels depends on individual circumstances, including financial considerations and lifestyle preferences. However, considering California’s sunny climate, investing in solar panels is a smart and forward-thinking choice.

Do you reside in California and have experience with solar panels? We welcome you to share your insights with Solar Earth INC or Call now for more queries.

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