St. Charles 400 Amp Service

When a standard 200 amp service can no longer keep up with everything your property demands, a 400 amp service upgrade gives you the maximum residential electrical capacity available - enough headroom to power large homes, multi-unit setups, workshops, multiple EV chargers, heavy HVAC systems, and just about any combination of high-demand loads without pushing your system to its limits. For St. Charles property owners who need serious electrical infrastructure, this is the upgrade that makes everything else possible.
A 400 amp electrical service is typically configured as a dual 200 amp setup, with two interconnected service panels or a single large-capacity service entrance that distributes power across your property's circuits. Like all service upgrades in Missouri, this work must be performed by a licensed electrician, coordinated with your utility provider, and confirmed through a post-upgrade inspection before the system is put into service.
The benefits go beyond raw capacity - a 400 amp upgrade replaces aging service equipment and wiring with high-quality materials, brings every aspect of the installation into compliance with current local electrical codes, and gives your property the solid electrical foundation it needs to support both current demands and future expansion.

A 400 amp service upgrade begins with a detailed assessment of your property's existing electrical system to plan the most effective configuration for your specific needs and load profile. Your electrician then installs the appropriate service entrance equipment - whether a dual 200 amp panel configuration or a single high-capacity service - and reconnects all circuits using high-quality materials rated for the expanded service. Every conductor, breaker, and connection point is evaluated during the installation and brought into full compliance with current NEC and local Missouri electrical codes.
Boschert Electric Inc. manages every phase of the 400 amp service upgrade, from the initial system assessment and utility coordination through the required post-upgrade inspection that verifies the installation is safe, functional, and fully code-compliant. A 400 amp service upgrade includes a comprehensive post-upgrade inspection as a standard part of the project - not an add-on - so your St. Charles property gets a thoroughly reviewed, finished electrical system rather than just new equipment. All work is performed by a licensed master electrician with over 30 years of residential and commercial electrical experience.
The completed upgrade supports dedicated circuits for any combination of high-demand systems, eliminates the capacity constraints that come with undersized service, and provides the enhanced safety that comes from replacing outdated wiring and equipment with modern, properly rated components throughout the installation.

Choosing a locally based, licensed electrical contractor for a project of this scale means the work is done correctly, to code, by professionals who understand the specific requirements of properties in the St. Charles area.

• Why choose a local contractor? Our team works directly with St. Charles inspectors and local utility providers, keeping the upgrade process streamlined and avoiding the coordination delays that out-of-area contractors often create.
• What experience do we have? Over 30 years of licensed electrician experience in residential and commercial electrical service, including large-scale service upgrades for high-demand properties.
• How do we ensure quality results? Every installation uses high-quality materials, is performed by a licensed master electrician, and is confirmed through a comprehensive post-upgrade inspection before the project is complete.
• What sets our service apart? Meticulous attention to detail on every project - from the initial assessment through final inspection - with a focus on both immediate safety and long-term system performance.
• Do you offer free estimates? Yes - free estimates are available for all electrical service upgrades, including 400 amp service installations for residential and commercial properties throughout St. Charles, MO.