Commercial Electrical Upgrades & Maintenance in California

Summit Technology Group upgrades and maintains electrical systems for commercial properties across, so the building you already operate keeps up with your business and stays ready for what you add next.

We are licensed electrical contractors in California, keeping North Bay businesses running since 1968.

Schedule an Assessment

Call (707) 542-4773

Keep Your Business Powered, Safe, and Up to Code

When a new walk-in cooler or a row of extra workstations is added, the electrical system behind your walls may be carrying a load it wasn't sized for. Many commercial buildings run on infrastructure designed for an earlier version of the business inside them, so the warning signs tend to appear gradually, like a breaker tripping during your busiest hours or a panel with no room left for new circuits.

At Summit Technology Group, our electricians upgrade that infrastructure and then stay with your property through ongoing maintenance, so you work with one team that already knows your building when something needs attention. It’s the same approach behind all of our commercial electrical services: plan for the capacity your operation needs today while leaving room for what you add over the next several years. For most properties, that planning starts with an honest look at what the current system can handle.

Electrical Upgrades Built for Growing Businesses

Growth rarely waits for a convenient moment to rewire. Many older industrial and flex buildings around Petaluma and Novato now house food and beverage producers and light manufacturers running far more equipment than the original tenants did. Our commercial electrical upgrades across California start with a load assessment, so we size the work to your equipment list and your expansion plans.

Electrical Panel & Service Upgrades

A commercial electrical panel upgrade in California usually begins with a load calculation that compares what your building draws today against the equipment or tenant space you’re planning to add. When the numbers show your existing panel or service is undersized, our electricians replace it with equipment rated for the added capacity. That gives new equipment dedicated circuits and leaves you spare space for the next expansion. We also replace outdated panels that still work but have become hard to find parts for, so a future repair doesn’t turn into an unplanned replacement.

Infrastructure & Wiring Upgrades

Aging wiring and distribution equipment can hold a building back long after the panel is replaced. We modernize feeders and subpanels so power reaches the parts of the building where you need it now. That includes the parking area where you want EV charging and the conference rooms and displays that depend on dedicated circuits for AV and network equipment. If you’re planning a full tenant buildout or new construction, our commercial electrical design and installation team handles that work from the drawings forward.

Energy Audits & LED Retrofits

An energy audit from our team shows where your electrical spending goes, from lighting that runs in empty rooms to equipment that draws power around the clock, so you can prioritize improvements by their return. Lighting is often the fastest win. California ended the sale of new linear fluorescent tubes on January 1, 2025, which means buildings still running T8 or T12 fixtures will eventually need replacement lighting. A commercial LED lighting retrofit in California lets you make that change on your own schedule while lowering the energy and maintenance costs tied to your lighting. Occupancy sensors added during the retrofit also keep lights off in spaces nobody is using.

Preventative Maintenance That Prevents Downtime

Once your system is sized correctly, the goal shifts to keeping it that way. Electrical problems in commercial buildings usually develop slowly, through connections that loosen and heat up or circuits that creep toward their limit as equipment gets added. Our commercial electrical maintenance service throughout California is designed to identify those changes while they’re still easy to fix.

Scheduled Inspections & Testing

During a scheduled visit, our electricians check the equipment that keeps your business running and record what they find, so trends show up in your records long before they show up as an outage. NFPA 70B, the industry standard for electrical equipment maintenance, calls for documented maintenance programs and regular infrared inspections; our visits provide that documentation. A typical inspection includes:

Thermal imaging of panels, switchgear, and connections to spot heat from loose or overloaded components
Load testing to confirm circuits and feeders have room for the equipment connected to them
A visual check of breakers and disconnects for wear, corrosion, or damage
A written report with findings, priorities, and recommended next steps

Maintenance Agreements for Commercial Properties

Our preventative electrical maintenance services for businesses are delivered through a maintenance agreement, which puts your building on a predictable service schedule with priority response when you need us between visits. We tailor each plan to your facility, including how often equipment gets inspected and when visits happen. That flexibility matters for wineries and hospitality properties in Napa County, where we can schedule work outside harvest and peak-visitor weekends so maintenance doesn’t compete with your guests or production. Over time, working with the same team means the electricians who arrive already know your building and the changes you’ve made since the last visit.

Scheduled inspections with thermal imaging and load testing
Written documentation after each visit
Priority response between visits
Visit schedules set around your operating hours and busy seasons
Identifying aging components before failure
Documentation and recommendations for future upgrades

Code Compliance & Safety

California updates its electrical code on a three-year cycle, and we keep your system current as those requirements change. Each visit adds to a maintenance record you can hand to an inspector or include with insurance paperwork, so you aren’t reconstructing your system’s history under a deadline when a renewal or inspection comes up.

★★★★★

“STG has been working with my construction company for the last 10 years and has always been a top tier partner in our builds. There is great value in a company that can pair up the electrical systems, low voltage systems, networking, AV, Solar and home automation. You have a single point of contact to make sure everything works together as intended and a single point of contact when maintenance or system upgrades are needed. Professionalism and quality at it's finest!”
Dustin Baxter · Google Review

Designed for Offices, Retail, Hospitality & Industrial Spaces

The right plan depends on how your building uses power, so we tailor upgrades and maintenance to the type of property you manage.

Offices

Workstations and server closets need stable, dedicated circuits plus room for the next round of equipment.

Retail

Lighting and signage run long hours, so efficient fixtures and well-maintained circuits show up directly on your energy bill.

Hospitality

Commercial kitchens and event spaces carry heavy, shifting loads. Our work with hospitality properties, restaurants, and bars helps us plan maintenance around service.

Industrial

Production equipment on three-phase service needs capacity planning and regular testing to keep lines running.

From a single building to multi-site properties, a single maintenance plan can cover all your locations on a shared schedule with consistent documentation. That consistency is especially useful in multi-tenant office buildings, such as many in San Rafael and San Francisco, where shared panels and distribution equipment serve several suites, and an issue in one space can affect the tenants around it. Knowing a building at that level also makes it easier to plan the systems you’ll want to add next.

Commercial Project Showcase

A look at electrical, EV charging, and solar work Summit Technology Group has completed for commercial properties.

Pedestal EV charging station installed at a commercial property

Commercial EV Charging

A pedestal EV charging station Summit installed for a commercial property, powered by a dedicated circuit.

Solar Carport

Solar carport structures over a commercial parking area, built and wired by our renewables and electrical teams.

Rooftop solar array on a winery building surrounded by vineyards

Winery Rooftop Solar

A rooftop solar array on a winery building, tied into the property's electrical system.

View Our Project Gallery

One Team for Electrical, Technology & Energy

Summit Technology Group designs and installs AV, networking, and solar systems alongside our electrical work, so when we plan your upgrade, we account for the systems you’re likely to add next. Capacity and pathways are ready when you get there, and the next project doesn’t start with another round of electrical work. When that time comes, our commercial technology and commercial solar teams will build on what we already know about your property.

Frequently Asked Questions

How often should a commercial building in California have its electrical system inspected?

At least once a year for most commercial buildings. NFPA 70B, the industry standard for electrical equipment maintenance, calls for infrared inspections at intervals of no more than 12 months, with more frequent checks for equipment in poor condition. During an assessment, we recommend a schedule based on your equipment’s age and workload.

How do California electrical code updates affect an existing commercial building?

Code updates apply when you permit new electrical work or alter an existing system, so a building that met code when it was built usually doesn’t need rewiring each time the code changes. The current edition, the 2025 California Electrical Code, took effect January 1, 2026, and the upgrades we permit today are designed for it. Planning your upgrades with the current code in mind helps avoid surprises when a project triggers an inspection.

Can my business still buy fluorescent tubes in California?

No. California’s AB 2208 ended the sale of new linear fluorescent lamps, including T8 and T12 tubes, on January 1, 2025. Specialty lamps for uses like medical and scientific equipment are exempt, but general lighting tubes are not, which makes a scheduled LED retrofit the practical path for most businesses.

How do I know if my commercial electrical panel needs an upgrade?

The clearest signs are breakers that trip during normal operation, a panel with no open spaces for new circuits, and plans to add equipment that the current service wasn’t sized for. Older panels with hard-to-find replacement parts are also worth evaluating before a repair becomes a replacement. A load calculation during an electrical assessment shows how much capacity you have left.

What’s included in a commercial electrical maintenance agreement?

Each Summit agreement is tailored to your facility. Plans typically include scheduled inspections with thermal imaging and load testing, written documentation after each visit, and priority response between visits. We set the visit schedule around your operating hours and busy seasons so maintenance fits the way your business runs.

Are there rebates for commercial LED lighting retrofits in Sonoma, Napa, and Marin counties?

Yes, though programs change. Utilities and local energy providers serving Sonoma, Napa, and Marin counties have offered incentives and financing for commercial lighting upgrades, and availability shifts from year to year. Checking current programs early in planning lets us scope your retrofit to match their requirements.

Can electrical upgrades happen without shutting down my business?

In most cases, yes. We phase the work and schedule any required shutdowns for after-hours or slower days, so power interruptions are brief and planned with you in advance. When a service change needs a utility-scheduled outage, we coordinate that timing with you well ahead of the work.

Will upgrading my electrical system now make it easier to add EV charging, solar, or AV later?

Yes. Sizing a panel upgrade with spare capacity and breaker space means future systems connect to infrastructure that’s already prepared for them. Because Summit also designs and installs technology and solar systems, we plan for those additions during the upgrade so you know what your system can support before the next project starts.

Start With a Commercial Electrical Assessment

If your building is taking on new equipment or you’re ready to put a maintenance plan in place, an assessment is the clearest place to start. Our team serves commercial properties across the North Bay and San Francisco, and our electricians will walk the property with you before recommending any work.

Share a few details about your property, and a member of our commercial electrical team will follow up to talk through your building and schedule an on-site assessment.

Book a Commercial Electrical Assessment