EV Charger Load Management: Avoiding Tripped Circuits

What is Load Management?

Load management (or dynamic load balancing) monitors your home's electrical usage and automatically adjusts EV charging power to prevent overloading your supply.

Why It's Important

Most UK homes have a main fuse rated at 60-100 amps. A 7kW EV charger draws 32 amps - a significant portion. Without load management:

• Cooking dinner while charging could trip your main fuse
• Electric showers (10kW) + EV charging = potential overload
• Winter heating + EV = risk of power issues

How It Works

A CT (Current Transformer) clamp is installed on your incoming supply. This monitors total household usage in real-time. When usage approaches your limit, the charger automatically reduces power to the EV.

Example

• Your home has 60 amp main fuse
• Normal usage: 15 amps
• EV charger set to: 32 amps
• Electric oven on: +13 amps = 60 amps (limit)
• Kettle on: Would exceed limit
• Load management: Reduces EV charging to 27 amps to allow kettle

Chargers with Built-in Load Management

• Ohme Home Pro (requires CT clamp)
• myenergi Zappi (via CT clamp)
• Easee (via Equalizer device)
• Wallbox (via Power Boost)

Do You Need It?

Load management is recommended if:

• Your main fuse is 60 amps or less
• You have other high-power appliances
• You want peace of mind
• Your installer recommends it

Most modern smart chargers include this feature or offer it as an add-on.