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The CMU-240-03 and CMU-240-04 are automated load-management upgrades to the CMU-240 series, designed for seamless power sharing between two high-demand 240 V loads, such as EV chargers, electric stoves, or dryers, without the need to manually switch loads. Unlike the CMU-240-01, which uses a contractor-installed selector switch, these units automatically prioritize the primary load and intelligently manage the secondary load to prevent service overloads.
Using internal current sensing technology, the CMU-240-03 (for 30 A applications) and CMU-240-04 (for 40 A applications) continuously monitor both connected circuits. When the primary load draws above its rated threshold, the unit automatically disconnects the secondary load to maintain panel safety. When overall power demand drops below the set threshold, both loads can run simultaneously, maximizing available capacity without manual intervention.
Automatic load prioritization using real-time current monitoring
Supports two 30 A (03) or two 40 A (04) loads with intelligent switching
Enables simultaneous operation when total amperage allows
Eliminates the need for a manual selector switch — installs once and runs fully on its own
Helps avoid costly panel upgrades by managing circuit demand inside existing service limits
Made in Canada and engineered for dependable residential or light commercial use
The CMU-240-03 and CMU-240-04 are automated load-management upgrades to the CMU-240 series, designed for seamless power sharing between two high-demand 240 V loads, such as EV chargers, electric stoves, or dryers, without the need to manually switch loads. Unlike the CMU-240-01, which uses a contractor-installed selector switch, these units automatically prioritize the primary load and intelligently manage the secondary load to prevent service overloads.
Using internal current sensing technology, the CMU-240-03 (for 30 A applications) and CMU-240-04 (for 40 A applications) continuously monitor both connected circuits. When the primary load draws above its rated threshold, the unit automatically disconnects the secondary load to maintain panel safety. When overall power demand drops below the set threshold, both loads can run simultaneously, maximizing available capacity without manual intervention.
Automatic load prioritization using real-time current monitoring
Supports two 30 A (03) or two 40 A (04) loads with intelligent switching
Enables simultaneous operation when total amperage allows
Eliminates the need for a manual selector switch — installs once and runs fully on its own
Helps avoid costly panel upgrades by managing circuit demand inside existing service limits
Made in Canada and engineered for dependable residential or light commercial use