Free bill analysis - bring a power bill, get the production math for your actual roof, panel brands like Qcells and REC compared side by side
If the pitch starts at your door and ends with "sign tonight for the special," sleep on it. The sun will still be there tomorrow; so will we.
Fast, Reliable Commercial Solar Installation Across Millbrae
Commercial solar in Millbrae runs into a problem most Bay Area installers have never seen: the FAA. Because the city sits directly beneath SFO’s approach corridors, a rooftop array that would sail through permitting in Burlingame or San Mateo can trigger a formal glare-hazard review here. We handle that paperwork, we specify the right panels for it, and we do it without blowing up your timeline. Call (877) 550-6892 and you’ll get Gus or one of his crew, not a call center.
Why Gus’s Solar Is Millbrae’s Preferred Commercial Solar Installation Company
We’re a Commercial Solar Installation team that’s been working the Peninsula long enough to know which Millbrae rooftops face FAA scrutiny and which ones don’t. Gus Petrakis puts his name on the truck and his phone number on the paperwork. That’s not a slogan. When a warehouse owner off Rollins Road had an interconnection question at 7 p.m., Gus answered the call himself.
Our track record in Millbrae comes down to three things: we quote your real year-25 output off your actual PG&E bill, we file the FAA Form 7460-1 paperwork before it becomes a surprise, and we don’t hand work off to subs. The crew that shows up is Gus’s crew. Background-checked, uniformed, and accountable to one person.
Response time to Millbrae is same-week for site assessments and design walkthroughs. We’re not scheduling you three weeks out for a first look. And our 90-Day Done Right Promise is in writing on every job: if it’s not right, Gus makes it right. One call brings him back.
Our Commercial Solar Installation Services in Millbrae
Warehouse & Industrial Solar
Flatland warehouses near the Caltrain corridor and along Rollins Road are the bread and butter of Millbrae commercial solar. Most of these buildings went up in the 1960s and 1970s with composition roofs that are now at the end of their service life. We’ll tell you straight if the roof needs replacing before we mount anything, because bolting 248 modules onto failing felt is how you get leaks and angry tenants. Our crew flashes every penetration properly and the array is engineered to Millbrae wind and seismic requirements.

Commercial Battery Storage
Commercial battery storage in Millbrae makes more financial sense than most places because PG&E’s time-of-use rates punish afternoon draw. A FranklinWH or Enphase battery bank lets you store mid-day solar production and discharge it during the 4-9 p.m. peak window. For Millbrae businesses running refrigeration, servers, or anything that can’t afford a brownout, battery backup also covers the frequent SFO-area grid flickers. We size the bank to your actual interval data, not a ballpark.

Solar Carport Installation
Carport solar in Millbrae solves two problems at once: you gain covered parking and you gain generation capacity without touching an aging roof. This matters in the flatlands, where many commercial properties have more asphalt than roof space. A solar carport over a parking lot near Millbrae’s downtown or along El Camino Real works well because the lots tend to be open with minimal tree shading. We engineer the structure for Millbrae’s wind zone and handle every permit and inspection.

Commercial Rooftop Solar
For Millbrae retail and office buildings, rooftop solar is still the most cost-effective option when the roof has years of life left. Hillside commercial properties above Murchison Drive often get excellent southern exposure and minimal fog interference, which means stronger production than flatland sites just a mile away. But those same hillside rooftops sit closer to SFO flight paths, so we run the FAA glare analysis early and specify anti-reflective coated panels when the approach corridor demands it. Getting that right up front saves you a rejected permit and a six-week delay.

What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Millbrae
We work with equipment we’d put on our own buildings. In Millbrae, that usually means Qcells or Canadian Solar panels with anti-reflective coating for FAA compliance, paired with Enphase microinverters for the marine-layer mornings. For commercial battery storage, FranklinWH is a frequent pick because the form factor fits tight electrical rooms in older Millbrae commercial buildings. We keep common inverter and monitoring parts in local stock so a failed microinverter doesn’t mean a week of downtime for your array.
Common Commercial Solar Installation Problems We See in Millbrae Homes
Millbrae commercial solar has failure modes that don’t show up in Fremont or San Jose. Here’s what we see most often:
- FAA glare-study surprises: An installer specs standard high-gloss panels, the permit hits the city, and Millbrae flags the array for an FAA Form 7460-1 review because it’s under an approach path. The re-spec to low-reflectivity panels adds cost and kills the schedule. We file the glare analysis before the permit goes in.
- Aging flatland roofs: Those 1950s-1970s composition roofs along the Caltrain corridor weren’t built to carry a 30-year solar array. We do a core-sample assessment before we design anything, and if the roof has five years left, we tell you to re-roof first. It’s cheaper than mounting solar twice.
- Marine-layer production loss: Summer mornings on the Millbrae flatlands sit under fog until 9 or 10 a.m. An undersized inverter or a poorly oriented array loses 1-2 hours of peak production every single day. We model your array against actual Millbrae irradiance data, not a California average.
- Hillside racking complexity: The steep-pitched roofs climbing west toward the ridgeline have great sun exposure but irregular orientations. Standard racking kits don’t fit. We custom-engineer the tilt and ballast for each hillside roof so the array sits flush and handles Millbrae’s wind load.
Pricing for Commercial Solar Installation in Millbrae, CA
Commercial solar in Millbrae is not a $2.95-a-watt market. Between FAA compliance requirements and re-roofing on older buildings, realistic numbers matter more than the salesman’s line. A flatland warehouse array on an existing good roof typically runs $2.60-$3.40 per watt installed before incentives, so a 100 kW system lands around $260,000-$340,000. A solar carport over a Millbrae parking lot runs $3.50-$4.50 per watt because of the steel structure and foundation work. Commercial battery storage adds $800-$1,200 per kWh depending on chemistry and scale. If your building needs a re-roof before mounting, budget another $6-$9 per square foot. Bring us your PG&E bill and we’ll build the math off your real usage and current export rates. The price we quote is the price you pay. Take two weeks to think about it. The number won’t change.
We Also Serve Cities Near Millbrae
Gus’s Solar serves Millbrae and the surrounding Peninsula, including San Bruno, Burlingame, Hillsborough, and South San Francisco. Same crew, same owner’s name on the truck, same no-pressure math. If your business sits just over the city line, we’re already working nearby.
Serving Millbrae, CA - Our Local Coverage Area
We’re based in the Millbrae area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - Commercial Solar Installation in Millbrae
Millbrae sits directly beneath SFO’s active approach and departure corridors, so the FAA requires a glare-hazard evaluation under Form 7460-1 for any structure that could reflect light toward a cockpit. Standard glossy panels fail that review. Burlingame is offset from the primary approach paths enough that most rooftop arrays clear without FAA involvement. Call (877) 550-6892 and we’ll check your address against the FAA’s approach maps before you spend a dime on design.
Flatland Millbrae arrays lose 1-2 hours of peak generation on summer mornings while the marine layer sits over the city. A production estimate built on California averages will overstate output by 8-12% for a flatland Millbrae site. We model your array using local irradiance data that accounts for the fog, and we quote the year-25 output, not the day-one brochure number.
The post-WWII flatland buildings along the Caltrain corridor and near El Camino Real were built in the 1950s-1970s, and their composition roofs are aging out. If a core sample shows less than five years of remaining roof life, we recommend replacement before mounting. The solar array will outlive the roof by 20 years, so bolting to a dying roof means paying twice for removal and remount.
An east-facing array on a Millbrae warehouse produces less total energy than a south-facing one, but it produces earlier in the day when PG&E time-of-use rates are lower. Net metering still applies, but the true-up economics shift. We file the interconnection application with the actual azimuth and tilt documented - no surprises at inspection. On a Rollins Road warehouse, we filed an eastern-azimuth array with FAA-mandated anti-reflective Qcells panels and Enphase microinverters, and the owner’s true-up reflected exactly what we modeled.
Hillside properties above Murchison Drive sit above the marine layer, so their arrays get cleaner morning sun and more consistent production than flatland sites. That means a string inverter can work well on hillside rooftops with uniform solar exposure. But Millbrae hillsides also have irregular lot orientations, so if panels face multiple directions, microinverters or power optimizers prevent one shaded module from dragging down the whole string. We design the inverter architecture to the actual roof, not a template.
Contact Gus’s Solar for Commercial Solar Installation in Millbrae
If you’re weighing commercial solar for your Millbrae building, bring us your PG&E bill. We’ll build the math off your real usage, file the FAA paperwork if your roof sits under an SFO approach path, and give you a number that won’t change next week. No signature wanted tonight. Call (877) 550-6892 for a free estimate and we’ll come out and walk the roof with you.
Written by Gus Petrakis, Owner at Gus’s Solar, serving Millbrae since 2011.






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