Completed on September 5, 2026

Dual Charger Setup in Garage

Complex dual charger installation engineered to power two electric vehicles simultaneously using dynamic load sharing on a residential electrical system.

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Project Highlights
  • Location Category Multi-Vehicle Residential Garage
  • Compliance Level 100% Code Verified
  • System Type Dual Level 2 Smart Power Sharing
  • Inspection Status Certified Passed
Dual Charger Setup in Garage

Project Overview & Objectives

The homeowners acquired a second electric vehicle and required an organized, high-capacity charging solution inside their two-car garage. Running two standard 48A wallboxes on an existing 200A residential panel risked continuous electrical overloads during peak evening hours when air conditioning and kitchen appliances were active. Our engineering team was tasked with deploying a paired charging setup that avoids the massive expense of a utility main service upgrade while delivering dependable overnight charging for both cars.

Technical Engineering & Execution

To solve the electrical capacity constraints, we specified two networked Level 2 charging wallboxes configured in an active master-slave power-sharing arrangement. We ran dual 6 AWG THHN copper wire circuits in high-grade EMT conduit from the main distribution panel to the garage mounting points. A dedicated current sensor communicates live panel metrics to dynamically throttle charge currents whenever domestic energy consumption spikes.

  • Dedicated continuous duty circuit design and panel inspection
  • High-amperage industrial conduit routing with zero structural impact
  • Smart dynamic load balancing configuration to prevent grid overload
  • Complete municipal permit acquisition and final utility sign-off

Results & Performance

The finished dual-charger configuration delivers up to 11.5 kW of high-speed Level 2 charging when a single vehicle is connected, and smoothly splits the available amperage into balanced 24A streams when both vehicles charge simultaneously. The installation fully passed municipal safety inspection on the first review, giving the household a dependable, clutter-free charging station tailored for years of trouble-free daily commutes.

Power Output Configuration 2x 11.5 kW Max (Dynamic Shared 48A / 24A Split)
Breaker Amperage 2x 60A Dedicated Double-Pole Breakers
Conduit Routing Distance 48 ft Surface-Mounted Heavy-Gauge EMT
Load Management System Dynamic Hardware Load Sharing with Real-Time Current CTs
Enclosure Weatherproof Rating NEMA 4 / IP65 Dust & Water Resistant
1
Two-EV Household Audit
Profiling both vehicles and their charging windows against the panel simultaneous-load headroom.
2
Side-by-Side Mounting & Shared Circuit
Installing both wallboxes on one engineered circuit with automatic current sharing.
3
Schedule Programming & Dual Test
Staggering start times, verifying simultaneous operation, and onboarding both drivers to the app.
Dual-Station Safety Standards

Shared-circuit dual chargers operate under NEC 625.42 load management with automatic fail-safe splitting and individual GFCI protection per unit.

Yes. Paired units share a single 60-100A circuit and split current automatically, so both vehicles charge safely overnight.
Simultaneously they split the available current, and when one finishes the other instantly receives full power. Staggered schedules can also guarantee full-rate windows.
One trench, one circuit run, and one permit typically cut total cost by 30 to 40 percent versus two independent installations.