The median installed solar price in San Marcos, CA was $2.96 per watt across 154 residential installations in the 12 months to September 2026.
Half of the residential solar installations in San Marcos in the 12 months to September 2026 cost between $2.93 and $3.07 per watt for the solar array.
Solar quotes submitted to San Marcos homeowners through online marketplaces had a median asking price of $2.50 per watt as of September 2026, $0.46 per watt below what San Marcos homeowners actually paid.
AgentSolar lists 11 solar installers based in San Marcos, CA and 126 within 15 miles; the most active based in San Marcos are EXO Energy, Solar Universe San Marcos and SOLNOVA.
Solar prices in San Marcos in 2026
$2.96/WMedian installed price, San Marcos154 quotes, last 12 months
$2.93–$3.07Typical installed range ($/W)middle 50%
$2.50/WMarketplace quote benchmark, San Marcosas of September 2026
Installed prices are what homeowners paid for the solar array on residential installations from the last 12 months (cash and loan purchases; leases and PPAs excluded). The marketplace benchmark is the median of quotes installers submitted to homeowners through online solar marketplaces — an asking price, before negotiation. See California pricing in detail →
Solar installers in and around San Marcos
The 11 based in San Marcos come first, ranked by tracked installations, then rating; the rest are the nearest of the 126 within 15 miles. Every profile shows real pricing, reviews and contact details.
Companies headquartered in San Marcos are listed first, ordered by the number of installations we have on record for them, then by customer rating. The remaining slots go to the nearest companies within 15 miles, closest first. Paid installer memberships do not affect the order.
The installation records come from public utility and state solar program filings and from quotes homeowners upload to AgentSolar. We match each record to the installer named on it, so a company's count reflects work we can actually attribute to them, not a claim on their website.
Equipment brands San Marcos installers carry
Enphase 4
Tesla 4
SunPower 2
boral 1
Cambria Quartz 1
Eagle Roofing 1
GAF 1
GAF Timberline Solar 1
GoodLeap 1
Jeld-Wen Windows & Doors 1
jm 1
Kohler 1
Solar in San Marcos: common questions
How much does solar cost in San Marcos, CA?
Across 154 residential installations in San Marcos from the last 12 months, the median price paid for the solar array was $2.96 per watt, with most between $2.93 and $3.07/W. These are cash and loan purchases; leases and PPAs are excluded. Quotes submitted to San Marcos homeowners through online solar marketplaces run a median of $2.50 per watt as of September 2026 — an asking price, before negotiation.
Who are the most active solar installers in San Marcos?
By installations on record, the most active solar installers based in San Marcos are EXO Energy, Solar Universe San Marcos, SOLNOVA, New Era Electric and RC Solar & Roofing. The order counts installations we can attribute to each company, then customer rating; paid installer memberships do not affect it.
Who are the best solar installers in San Marcos?
Among installers serving San Marcos with at least 10 customer reviews and solar installations on record, the highest rated are Cosmic Solar & Roofing (4.9 from 268 reviews), Dils Roofing & Solar (4.9 from 174 reviews) and EXO Energy (4.3 from 103 reviews). Ratings are each company's overall customer rating across all of its work, not solar alone. Paid installer memberships do not affect this list.
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