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.
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AfterFast, Reliable Commercial Solar Installation Across Claremont
Commercial solar installation in Claremont costs between $2.40 and $3.20 per watt installed, meaning a typical 50kW rooftop system on a warehouse or retail building runs $120,000 to $160,000 before federal tax credits and depreciation. Most Claremont commercial projects take two to four weeks from permit approval to final interconnection, and Gus’s Solar handles every step: design, engineering, permits, installation, and the utility paperwork. Call (877) 550-6892 for a straight answer on what your building can produce, and what it will cost.
We know Claremont’s commercial districts, from the Village storefronts to the warehouses off Arrow Highway and the office parks near the Montclair border. We work around your operating hours, keep the loading docks clear, and don’t hand the job to a sub. Gus Petrakis puts his name on the truck and the work.
Why Gus’s Solar Is Claremont’s Preferred Commercial Solar Installation Company
Gus’s Solar has been locally owned since 2011, and the difference shows in how we handle Claremont’s commercial projects. No out-of-state call center. No sales rep who disappears after the contract. When a Claremont business owner calls, a live person answers, 24/7. That person is often Gus himself.
Our commercial work in Claremont has taught us the local landscape: the protected tree canopies that shade rooftops, the 100-amp panels in older buildings near the Village, the east-facing roof planes that lose early-morning sun to the San Gabriel foothills. We design around all of it, and we quote the year-25 output off your actual utility bill, not a brochure number. Bring us a bill. We’ll bring you the math. Take two weeks to think about it. The price will be the same.
Every commercial job carries the 90-Day Done Right Promise, in writing. If something isn’t right, Gus makes it right. That’s not a warranty slogan. It’s how we’ve operated for over a decade, and it’s why Claremont businesses keep calling us back.
Our Commercial Solar Installation Services in Claremont
Commercial Solar Installation covers more than panels on a roof. Here’s what we handle for Claremont businesses, warehouses, and institutions.
Commercial Rooftop Solar
Flat and low-slope roofs dominate Claremont’s commercial building stock, from the auto shops on Foothill Boulevard to the distribution centers south of the 10. We install ballasted and mechanically attached racking systems designed for TPO, EPDM, and metal roofs, with panels from Qcells, REC, and Panasonic. Every roof penetration gets flashed properly, by Gus’s own crew, not a sub. If a salesperson needs an answer tonight, the answer is no.
Warehouse & Industrial Solar
Warehouses along Arrow Highway and the industrial pockets near the 10 have large, open roof space, but that doesn’t make them simple. Protected street trees along property lines throw shade patterns that shift throughout the day. We model the actual shade, not a generic sun map, and size the system around what your roof truly receives. Power optimizer and microinverter systems are standard for us here, because they harvest partial sun instead of losing the whole string when one section goes dark.
Solar Carport Installation
Claremont parking lots bake in summer heat that regularly exceeds 100°F, and a carport array turns dead pavement into a working asset. We design and build steel carport structures that hold panels overhead while keeping cars shaded and employees cooler. For businesses in the Village where rooftop space is tight or historically protected, carports often unlock more production than the building itself could.
Commercial Battery Storage
Claremont sits in Southern California Edison territory where time-of-use rates punish heavy afternoon consumption. A commercial battery system sized to your building’s load profile shifts stored solar into the expensive evening window, and it keeps critical circuits running during Public Safety Power Shutoffs that hit the foothill communities. We pair Enphase and FranklinWH battery systems with solar arrays, sized from your real usage data, not a guess.
What happens when you call
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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 Claremont
We install and service equipment from Qcells, REC, and Panasonic, along with Enphase microinverters and SolarEdge optimizers. Because we stock common parts and inverters locally for Claremont customers, a failed microinverter or a cracked panel doesn’t mean waiting two weeks for a shipment. Gus’s crew handles the replacement, and the 90-Day Done Right Promise covers the workmanship. No runaround. No ticket queue.
Common Commercial Solar Installation Problems We See in Claremont
Claremont’s commercial buildings share a few recurring failure points, and we see them often enough to plan around them from day one.
- Protected tree canopies cutting production on string inverter systems. The City of Trees earns its name. A single mature oak or jacaranda throwing partial shade across a string inverter array can cut output by 30% or more, because the whole string drops to the weakest panel. Microinverters and power optimizers solve this, but only if the installer designs for it from the start.
- 100-amp panels in older buildings tripping after interconnection. Many pre-WWII and mid-century commercial buildings near the Village still run 100-amp electrical services. Once solar backfeeds the panel, the main breaker can trip under load. We identify this early and fold the service upgrade into the project timeline so your net metering approval isn’t delayed.
- East-facing roof planes losing early-morning production. The San Gabriel foothills rise to the north, and the terrain elevation shortens the effective morning sun window on east-facing planes. A generic east-facing design that works in Pomona will underproduce on Claremont’s north side. Our production estimates account for the actual azimuth and terrain, not a flat assumption.
- Redirecting arrays to unshaded planes that aren’t the main roof. This is the Claremont signature problem. The ideal roof, the shadiest yard. We regularly move the array to a smaller, unshaded plane, like a loading dock roof or a carport, and design the system to hit the production target from there.
Pricing for Commercial Solar Installation in Claremont, CA
Commercial rooftop solar in Claremont runs $2.40 to $3.20 per watt installed. A 30kW system on a retail building typically lands between $72,000 and $96,000. A 100kW warehouse array runs $240,000 to $320,000. Solar carports cost more, usually $3.50 to $4.50 per watt, because of the steel structure. Commercial battery storage adds $700 to $1,100 per kilowatt-hour of usable capacity, depending on the chemistry and the integration work.
What moves the number: your roof’s condition, whether the panel feeder needs an upgrade, the shading profile from protected trees, and whether you choose panel-level electronics (which we strongly recommend in Claremont). We quote the year-25 output, not the day-one brochure number. Call (877) 550-6892 for a free estimate built off your actual bill. No signature wanted tonight.
We Also Serve Cities Near Claremont
Our crews work throughout the eastern San Gabriel Valley, including Montclair, La Verne, Upland, and Pomona. Each city has its own tree ordinances, terrain profiles, and utility quirks. Our Claremont page covers the specifics here, and we bring the same local-grade design approach to every neighboring city we serve.
Serving Claremont, CA - Our Local Coverage Area
We’re based in the Claremont 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 Claremont
Claremont’s tree protection rules mean you generally cannot trim or remove a mature oak, jacaranda, or protected street tree just to clear a path to sunlight, even when that tree shades your commercial rooftop. That means designs here must work around partial shade, not eliminate it. We use microinverter or power optimizer systems specifically because they harvest partial sun from shaded panels, so a protected canopy doesn’t kill your entire production. This is a constraint that doesn’t exist in Pomona or Ontario, and it changes the right equipment choice for nearly every Claremont commercial project. Call (877) 550-6892 and we’ll come look at your actual roof and the trees around it.
If your building has a 100-amp electrical panel, which is common in older Craftsman and mid-century commercial structures around the Village and south Claremont, you very likely need an upgrade to 200 amps before the utility will approve interconnection. We identify this during the design phase, get the upgrade scheduled alongside the solar work, and keep your project moving without a multi-month gap. The upgrade cost is typically $3,500 to $6,500 for a commercial panel, depending on your existing service and the distance from the meter to the main panel. Call us for a site check and we’ll tell you honestly whether you need one.
Claremont sits at roughly 1,100 feet elevation at the foot of the San Gabriel Mountains, where summer temperatures regularly pass 100°F, well above coastal Los Angeles. That heat drives heavy air conditioning loads in commercial buildings from May through September, and those daytime cooling hours align almost perfectly with peak solar production. Higher consumption plus SCE’s time-of-use rates means the same solar array offsets more expensive electricity here than it would in Santa Monica or Long Beach. We typically see Claremont commercial payback periods land between 4 and 6 years, versus 7 to 9 years for coastal commercial customers.
The San Gabriel foothills directly north of Claremont do not block south-facing sunlight, so your main production plane is unaffected. The real impact is on east-facing roof planes, which lose early-morning production because the terrain elevation delays direct sun. We account for that in the production estimate, and we often shift the array layout to favor south and west planes where the math is better. If your building’s best roof faces east, we’ll tell you what that actually costs you in annual output before you sign anything.
Yes. On a warehouse near the Claremont Wilderness Park, our crew found the north-side loading dock’s roof plane was the only unshaded surface, because city-protected sycamores along the parkway threw dappled shade across the main roof. We laid out Qcells panels with Enphase microinverters on that smaller plane, added a rapid shutdown system to meet code, and the owner now sees a production estimate within 5% of the original despite the tree canopy. A string inverter design would have failed. If your roof is shaded by protected trees, call (877) 550-6892 and we’ll design around the canopy, not through it.
Written by Gus Petrakis, Owner at Gus’s Solar, serving Claremont businesses since 2011.