Custom Engineering
In-house design and engineering services develop production-ready switchboard layouts, schematics, and submittals that improve fit, coordination, compliance, and installation efficiency before fabrication begins.
DEI Power builds custom switchboards and power distribution equipment engineered for demanding commercial, industrial, and utility applications. From its Ontario, California facility, the team combines in-house engineering, UL 891-certified manufacturing, and fast fulfillment to help contractors, engineers, and facility teams reduce delays, simplify approvals, and keep critical projects moving with dependable, code-compliant solutions.
Custom-engineered switchboards, switchgear, and support services for compliant, reliable power distribution projects.
In-house design and engineering services develop production-ready switchboard layouts, schematics, and submittals that improve fit, coordination, compliance, and installation efficiency before fabrication begins.
Specification-driven switchgear supply includes rating guidance, enclosure selection, documentation, and fulfillment support to reduce change orders, field adjustments, and schedule risk on critical projects.
Heavy-duty service entrance switchgear is built for commercial and industrial applications requiring dependable protection, code compliance, Siemens components, and service-friendly layouts for long-term reliability.
Remote power panels support high-density branch circuit distribution with scalable configurations, integrated monitoring, and improved visibility for data centers and other critical infrastructure environments.
Low-voltage switchgear solutions support flexible system integration, accessible maintenance, and dependable distribution for commercial buildings, industrial facilities, and infrastructure projects.
Project support helps contractors and engineers configure custom layouts, ratings, and system integration details for smoother approvals, installation, and long-term field performance.
DEI Power manufactures custom switchboards tailored to project specifications, voltage requirements, and installation conditions. With in-house engineering, Siemens OEM capabilities, and UL 891-certified production in Ontario, California, the company helps customers streamline submittals, reduce field issues, and maintain schedule certainty. Domestic manufacturing and responsive support also make sourcing easier for projects with compliance, documentation, and Buy America Build America requirements.
See how dependable manufacturing and engineering support help customers keep critical power projects on track.
Customers rely on DEI Power for speed, precision, and dependable electrical manufacturing support.
UL 891-certified manufacturing supports safer, code-compliant switchboards for demanding commercial and industrial applications.
Ontario, California inventory and in-house production help reduce lead times for time-sensitive projects.
Approved Siemens OEM status supports accurate configurations, trusted components, and dependable long-term performance.
DEI Power ships nationwide with documentation and guidance that simplify approvals across varied project requirements.
Experienced specialists behind every custom power solution.
DEI Power has spent more than 10 years building reliable switchboards and switchgear for commercial, industrial, and utility applications. Operating from a 50,000 sq. ft. facility in Ontario, California, the company combines manufacturing, assembly, and engineering support under one roof to improve quality control and shorten lead times. That local production base supports faster fulfillment for customers across the country while maintaining the documentation, compliance, and precision required on complex electrical projects. DEI Power’s growth has been driven by a practical mission: deliver code-compliant, dependable power distribution equipment that helps contractors, engineers, and facility teams avoid delays, reduce risk, and keep critical systems operating with confidence.
A custom switchboard manufacturer designs and builds power distribution equipment to match a project’s electrical ratings, layout, enclosure, and application requirements. DEI Power supports this process with in-house engineering, specification review, submittals, and UL 891-certified manufacturing, helping contractors and engineers receive equipment that is easier to approve, install, and maintain in the field.
Talk with our team about specs, lead times, and compliance.
DEI Power supports customers across the country with fast shipping, engineering guidance, and responsive project coordination.
Nationwide
Service Area
24/7 Phone Availability
Support Access
Ontario, CA
Fulfillment Hub
We coordinate nationwide shipping and project support.
Certified for compliant low-voltage switchgear manufacturing.
Approved OEM for trusted component integration.
Domestic production supporting compliant project sourcing.
Share your project requirements, ratings, and timeline, and our team will help you identify the right configuration and next steps.
For immediate assistance, feel free to give us a direct call at (866) 773-8050. You can also send us a quick email at sales@deipower.com.
For immediate assistance, feel free to give us a direct call at (866) 773-8050. You can also send us a quick email at sales@deipower.com.