Approved OEM Siemens
At Electrical Panelboard Supply Fontana, we design and manufacture high-performance electrical panelboards built to power the most demanding commercial and industrial applications. Proudly made in California, our panelboards feature fast lead times, clean layouts, and comprehensive documentation—so contractors can install with confidence and keep projects on schedule.
We are dedicated to delivering custom panelboards with unmatched quality, the fastest lead times guaranteed, and deep expertise you can rely on.
We are a Siemens OEM Approved Partner, delivering UL Certified switchgear built for safety, reliability, and compliance.
Every California panelboard we produce is thoroughly tested to meet UL 891 certification standards. This ensures safe operation under rated current, proven performance, and complete documentation for inspections and project closeouts. With our precision engineering and quality control, your installation passes approvals faster and stays compliant every step of the way.
From lighting and power distribution to mixed-load applications, our custom panelboard configurations are designed to meet your specific project requirements. Choose from main-lug-only or main-breaker setups, copper bus options, feed-through lugs, integrated metering, and surge protection. Each system is built for high performance in commercial facilities, healthcare institutions, and data centers throughout California.
Factory-assembled options up to 600 Vac and 1200 A to fit service or feeder applications.
Ready for utility or tenant metering and energy insight add-ons where specified.
NEMA 1/3R/12 enclosures available for diverse environments.
Our low-voltage electrical panelboards deliver reliable, code-compliant power distribution with exceptional speed and precision. Every panelboard is tailored to your project’s load, space, and schedule—ensuring durable, efficient performance in even the most challenging environments.
High-performance electrical panelboards built for uptime & scalability
Efficient systems keeping production lines powered without downtime
Scalable power systems driving logistics, operations, and customer service
Custom electrical panelboards enhancing safety, efficiency, and tenant comfort
We manufacture low voltage electrical panelboards built for your project’s demands, delivering reliable code compliant solutions with unmatched speed and performance.
Every California panelboard is verified through rigorous testing to meet UL 891 standards. Our process confirms safe operation under rated current and provides complete documentation for inspections and project closeout.
Verifies insulation strength and ensures safe operation across rated voltages.
Confirms that conductors and bus maintain performance under continuous load.
Validates structural integrity, enclosure fit, and reliable breaker operation.
Complete factory test data and certification packages.
Every California panelboard is verified through rigorous testing to meet UL 891 standards. Our process confirms safe operation under rated current and provides complete documentation for inspections and project closeout.
When you need custom-built electrical panelboards that combine performance, reliability, and speed, trust Electrical Panelboard Supply Fontana. We’ll engineer the perfect interior, breakers, and enclosure for your project and deliver it quickly—helping you stay ahead of schedule and on budget. Request a quote today to see why contractors across California depend on us for high-quality, custom electrical panelboards delivered fast and ready to install.
Local manufacturing shortens logistics, simplifies changes, and helps hit tight milestones. Standardized builds and disciplined material control reduce rework while keeping quality high—so your California panelboards arrive ready to land and terminate.
We ship across the U.S., Canada, and Mexico. Whether you’re in a metro area or remote location, our network ensures your heavy or high-value equipment moves quickly—without delays, customs issues, or added stress.
Whether you’re looking for backup power systems, industrial energy storage, or sustainable energy consulting, we’re ready to support your project needs. Be as specific as possible so we can connect you with the right expert.
+1 (866) 773-8050
1745 S. Bon View Ave Ontario CA 91761
sales@deipower.com
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What Is a Custom Panelboard—and Do You Need One?
5 Signs Your Facility Needs a Panelboard Upgrade
Office Location
1745 S. Bon View Ave
Ontario CA 91761
Contact Info
Phone: +1 (866) 645-1281
Email: sales@deipower.com
What Is a Custom Panelboard—and Do You Need One?
5 Signs Your Facility Needs a Panelboard Upgrade
What Is a Custom Panelboard—and Do You Need One?
5 Signs Your Facility Needs a Panelboard Upgrade
