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 Piedmont
If you own a commercial building in Piedmont, you already know the math problem: PG&E rates keep climbing while the roof over your business sits there absorbing free sunlight. A properly sized commercial array in Piedmont typically pays for itself in 5 to 8 years, after which the electricity is essentially free for the remaining life of the system. We’re a locally owned shop that has been doing this work long enough to know Piedmont’s hills, its building stock, and its permit office by heart. Call (877) 550-6892 and we’ll come out, look at your actual usage, and give you straight numbers.
Why Gus’s Solar Is Piedmont’s Preferred Commercial Solar Installation Company
Gus Petrakis started this company in 2011, and his name is still on the truck, the building, and every invoice. That matters more in Piedmont than in most places, because Piedmont is a 1.7-square-mile city where reputation travels block to block. When a business owner on Highland Avenue gets a system installed, their neighbor on Crocker Avenue hears about whether the crew showed up on time and whether the panels actually perform.
Our Piedmont customers tend to be people who have already done the math and gotten burned by someone else. A national outfit quotes a number on the phone, and a different number shows up at the contract. We don’t operate that way. Bring us a bill, we’ll bring you the math. The number we quote is the number on the contract, and the number on the final invoice.
We answer our own phone 24/7, and it’s a live person when you call, not a ticketing portal. For commercial work in Piedmont, we can usually have someone out within one to two business days for an initial assessment. Gus’s own crew does the install, background-checked and uniformed, and they don’t hand the work off to a sub.
Our Commercial Solar Installation Services in Piedmont
Commercial work in Piedmont is different from residential work in one important way: the buildings are often as architecturally difficult as the homes, but the electrical demand is far higher. Every project starts with your real utility data, the way Commercial Solar Installation should be done, not a brochure average.
Commercial Rooftop Solar
Piedmont’s commercial buildings, many of them near the Grand Avenue commercial corridor and the small retail pockets along Highland Avenue, tend to have flat or low-slope membrane roofs. That’s actually good news: it means we can use ballasted racking systems that don’t penetrate the roof membrane at all, which preserves your warranty and reduces leak risk. We assess roof condition, remaining lifespan, and structural load capacity before we ever place a panel.

Warehouse & Industrial Solar
If you’re running a warehouse or light-industrial operation in Piedmont, your roof is probably your largest underused asset. PIDMONT 94620’s commercial district is small but dense, and businesses with refrigeration, HVAC, or any continuous electrical load benefit most from offsetting peak daytime rates. We size systems to your actual load profile, and we can add Piedmont EV Charger Installation if your fleet is going electric, not to the square footage of your roof.

Solar Carport Installation
For Piedmont businesses with parking lots, a solar carport does double duty: it generates power and it shades vehicles and pavement, which reduces the heat-island effect and keeps your lot noticeably cooler. Given Piedmont’s land constraints, a carport is sometimes the only way to add meaningful solar capacity when the roof is already maxed out, needs Solar Panel Cleaning in Piedmont, or is too shaded by the city’s mature tree canopy.

Commercial Battery Storage
Piedmont sits in PG&E territory with time-of-use rates that punish businesses for using power between 4 and 9 p.m. We pair commercial arrays with FranklinWH or similar battery systems so you can store midday production and discharge it during peak windows. It’s the same service we offer for homes through Solar Battery Storage & Backup in Piedmont. For a business, the savings multiplier is often larger because demand charges are eliminated.

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 Piedmont
We work with equipment we would put on our own building: Panasonic, Canadian Solar, and JinkoSolar panels, paired with FranklinWH battery storage. We keep common replacement parts in the Bay Area, not in a warehouse three shipping days away. For Piedmont commercial clients, that means a failed microinverter or a damaged panel gets swapped quickly, not weeks later. And if you already have a system from another installer, we service that too. See Solar Panel Installation in Piedmont if you’re also considering a residential array for your own home.
Common Commercial Solar Installation Problems We See in Piedmont Homes
Actually, the problems show up on Piedmont buildings, not just homes. Here is what we see most often:
- Shade from protected trees. Piedmont’s tree protection ordinance is among the strictest in Alameda County. Trimming a mature coast live oak or redwood to clear a solar path requires city permits and a certified arborist review. We design around the canopy with microinverters and power optimizers instead of counting on being able to remove the obstruction.
- Steep, multi-plane rooflines on older commercial conversions. Some Piedmont commercial properties were originally residential buildings from the 1910s through 1940s, converted to office or retail use. Their steep hip and gable roofs, clay tile, and dormers make standard racking impossible. Custom flashing and structural evaluation are not optional.
- Panel-level failures from installation shortcuts. Piedmont is not the place for commodity racking and string inverters. When one panel is shaded on a Piedmont hillside, a string system drags the whole array down. We use module-level power electronics on every commercial job here, no exceptions.
- Undersized systems quoted by out-of-town sales crews. We hear this repeatedly from Piedmont business owners: a door-knocker quoted a system based on square footage, not usage. The system underproduced, the savings never materialized, and the company is gone. I quote the year-25 output, not the day-one brochure number.
Pricing for Commercial Solar Installation in Piedmont, CA
You deserve actual numbers, so here they are. A small commercial rooftop system in Piedmont, meaning under 30 kW, typically runs $65,000 to $95,000 before incentives. A mid-size system in the 30 to 100 kW range lands between $95,000 and $240,000. Solar carports generally add 30 to 50 percent to the per-watt cost compared to a rooftop array, because of the steel structure and foundation work. Solar Battery Storage & Backup in Piedmont with FranklinWH typically adds $18,000 to $30,000 depending on capacity.
What moves the needle: roof complexity (clay tile and steep pitches cost more to work around than a flat membrane), electrical panel condition, and whether your building is in a Piedmont design review overlay that requires additional drawings. Every quote we write is built off your actual utility bill and your actual usage. The estimate is free. Take two weeks. Think about it. The price will be the same. Call (877) 550-6892 for an exact figure.
We Also Serve Cities Near Piedmont
Piedmont is surrounded by Oakland on all sides, so we routinely cross the city line for commercial work in nearby areas. We serve business owners in Oakland, Emeryville, Berkeley, and Orinda, and our crews know the Bay Area permit landscape well. If your building is in one of these cities, visit Piedmont for more detail, or just call us directly and we’ll tell you where we can help.
Serving Piedmont, CA - Our Local Coverage Area
We’re based in the Piedmont 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 Piedmont
We can typically have someone out for an initial commercial assessment within one to two business days in Piedmont. Emergency repair calls, like a system that has completely stopped producing, get priority scheduling. Call (877) 550-6892 and a live person will give you an honest arrival window, not an automated message.
Yes. We work across the entire 94620 zip code, from the streets near Grand Avenue to the upper hillside properties near Piedmont Park and the areas backing up to the Oakland hills. Upper-elevation parcels often sit above the marine layer, which means more annual sun hours than lower Oakland. But steep north-facing rear slopes require careful aspect and tilt analysis, and we do that assessment on every quote.
Piedmont costs run slightly higher than flatland Oakland or Emeryville, mostly because of roof complexity and the city’s design review requirements. A small commercial system in Piedmont typically runs $65,000 to $95,000, where the same system in a flatland warehouse district might come in 5 to 10 percent lower. The difference is not our margin. It’s the engineering time for steep pitches, clay tile, and custom flashing. We quote the same price to everyone, and it’s built from your actual bill.
Yes. A live person answers the phone 24/7, and we send someone out as soon as possible for commercial systems that have stopped producing. If a system goes down in Piedmont during peak summer production, you’re losing real money every day. Don’t wait. Call (877) 550-6892 and we’ll tell you exactly when we can be there.
Every commercial job comes with our written 90-Day Done Right Promise. If it’s not done right, we make it right, one call brings Gus back. Beyond that, the panels, inverters, and batteries carry manufacturer warranties that we register for you and track on your behalf. If something fails six years in, we’re still here, and we’ll be the ones to call the manufacturer and push the claim through.
If you own a commercial building in Piedmont and you’re tired of paying PG&E more every year, call us at (877) 550-6892 for a free estimate. We’ll bring the math, and you can take two weeks to think it over. The price won’t change.
Written by Gus Petrakis, Owner at Gus’s Solar, serving Piedmont and the surrounding Bay Area since 2011.






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