FAQs

Common Questions

• What Appliances Can the Black Box Manage?

  The Black Box works with any high-draw 240V appliance: Level 2 EV chargers, hot tubs, swim spas, central air conditioners, steam showers, saunas, and more. It is paired specifically to one managed appliance while continuously monitoring the rest of your home’s total load.

• Is It Safe to Pause Power to My EV Charger or Hot Tub?

  Yes. The Black Box uses a fail-safe design that pauses power to the managed appliance before your panel reaches its limit — then automatically restores it when capacity is available. EV chargers and hot tubs are designed to handle intermittent power, so there is no risk of damage to the equipment.

• Will I Notice When the Black Box Is Working?

  Most people don’t. Pauses typically happen during peak household use — cooking dinner, running the dryer — and most EV charging happens overnight when the rest of the house is quiet. In practice, you still wake up to a full charge.

• Does a Black Box Installation Still Require a Permit?

  Yes. Any new 240V appliance circuit requires a General Wiring permit in Calgary and Chestermere, regardless of whether an Intelligent Load Controller is involved. We handle the permit and inspection coordination as part of every installation.

• How Does the Black Box Compare to a Full Service Upgrade?

  A service upgrade is the right answer when your home’s total demand genuinely exceeds your service capacity — for example, when adding multiple high-draw loads or legalizing a basement suite. The Black Box is a faster, more cost-effective solution when your panel has physical space for a breaker but not the continuous load margin for a single high-draw appliance. We run a load calculation first and recommend the right approach for your situation.

  For context, a full service upgrade can run roughly $3,500–$5,000 or more and requires coordinating with the utility (Fortis/Enmax) to change the service. A Black Box usually costs significantly less and can be installed in a few hours — often the fastest way to add a high-draw load to a 100-amp home.

• Is the Black Box Approved Under the Canadian Electrical Code?

  Yes. Brands like Black Box Innovations and DCC are CSA/UL approved and fully compliant with the Canadian Electrical Code (Section 8). Using one of these devices allows us to legally omit the EV charger from your home’s load calculation — which is why you often don’t need a service upgrade.

• My Black Box Is Making a Slight Humming Sound — Is That Normal?

  A very faint hum is normal for devices with internal transformers or contactors. However, if you hear a loud buzzing or “chattering” sound, it could indicate a loose connection or debris in the contactor. Give us a call, and we can perform a quick diagnostic check.