Common Misconceptions About Solar Energy in San Diego

This post was originally published on 2025-02-14 and is kept here as published, lightly edited for accuracy.

Tax rules have changed since it was written: the 30% federal residential credit (IRC Section 25D) expired on 31 December 2025. For the current position, read our 2026 explainer on what changed.

Solar energy is becoming increasingly popular across the globe, and San Diego is no exception. However, despite its rising adoption, several misconceptions persist about solar power. These misunderstandings can deter individuals and businesses from investing in this sustainable energy source. In this post, we'll debunk some of the most common myths surrounding solar energy in San Diego.

One of the most prevalent misconceptions is that solar energy is prohibitively expensive. While the upfront costs can be significant, numerous incentives and financing options are available to help offset the initial investment. The federal Investment Tax Credit (ITC) allows homeowners and businesses to deduct a portion of their solar costs from their taxes. Additionally, San Diego offers various local rebates and incentive programs that make solar energy more affordable than ever. Over time, the savings on electricity bills often outweigh the initial costs. (Editor's note: the federal residential credit described here, IRC Section 25D, expired December 31, 2025 and does not apply to a 2026 purchase or loan -- see our 2026 explainer for what currently applies.)

Another common myth is that San Diego doesn't receive enough sunlight for solar panels to be effective. In reality, San Diego is one of the sunniest cities in the United States, boasting over 260 sunny days per year. This abundance of sunshine makes it an ideal location for harnessing solar energy. Even on cloudy days, solar panels can still generate electricity, although at a reduced capacity. The consistent sunlight ensures that solar panels in San Diego are highly effective year-round.

Some people believe that solar panels require extensive maintenance, leading to additional costs and effort. However, solar panels are designed to be low maintenance and highly durable. Typically, they only need occasional cleaning to remove dust or debris and routine inspections to ensure optimal performance. Most solar panel systems come with warranties that cover maintenance issues for several years, providing peace of mind to homeowners and businesses.

Reliability concerns often stem from the belief that solar energy depends solely on sunlight, creating potential inconsistencies. However, modern solar technology includes battery storage solutions that store excess energy generated during sunny days for use during cloudy days or at night. This means that solar power can provide a consistent energy supply regardless of weather conditions.

Many worry that installing solar panels could damage their roofs. In truth, when installed by certified professionals, solar panels can actually protect the roof by shielding it from harsh weather conditions and UV rays. The installation process involves secure mounting systems that prevent any harm to the roofing structure. Additionally, if you plan to replace your roof, it's often convenient to install both a new roof and solar panels simultaneously.

By understanding and overcoming these misconceptions, more individuals and businesses can take advantage of the benefits offered by solar energy. San Diego's favorable climate and supportive policies make it an ideal location for transitioning to renewable energy. By investing in solar power, homeowners and businesses can reduce their carbon footprint, lower electricity bills, and contribute to a more sustainable future for the community.

As awareness grows and technology advances, it's essential to rely on accurate information when considering solar energy options. By debunking these myths, we hope to encourage more San Diego residents to explore the potential of solar power as a viable and beneficial energy solution.