Perth homes are using more electricity than ever as property owners install EV chargers, solar systems, home batteries, induction cooking, electric hot water systems & other high-demand electrical equipment. While these upgrades can improve energy efficiency and reduce reliance on traditional energy sources, they can also place additional demand on the existing electrical supply.
In some properties, the existing mains connection may not have been designed to support this level of electrical load. Before installing major new equipment, homeowners should have the supply capacity, switchboard, consumer mains & underground electrical infrastructure assessed by a licensed Electrician Perth property owners can rely on for compliant electrical work.
Why Electrical Demand Is Increasing
Modern homes can place significantly higher loads on the electrical network than properties built several decades ago.
Common upgrades contributing to increased demand include:
- EV charging stations
- Rooftop solar systems
- Home battery storage
- Reverse-cycle air conditioning
- Induction cooktops
- Electric hot water systems
- Pool equipment
- Workshops & machinery
- Home extensions
- Additional buildings or granny flats
Individually, these systems may operate within the available supply. However, when several high-demand appliances operate simultaneously, the existing electrical infrastructure may no longer provide sufficient capacity.
EV Chargers Can Place Significant Demand on the Supply
Electric vehicle chargers are becoming increasingly common across Perth homes. Depending on the charger and electrical configuration, EV charging can represent one of the largest continuous electrical loads within a residential property.
Standard power outlets provide relatively slow charging, which is why many homeowners install dedicated EV charging equipment.
Higher-capacity chargers may require:
- Dedicated electrical circuits
- Additional switchboard protection
- Larger consumer mains
- Three-phase power
- Load management equipment
- Supply upgrades
Before installing an EV charger, the property’s maximum electrical demand should be assessed to determine whether the existing infrastructure can accommodate the additional load.
Solar Does Not Automatically Increase Supply Capacity
Solar panels generate electricity, but installing a solar system does not necessarily mean the property’s mains supply can support additional high-demand appliances.
During periods when solar generation is low, appliances may still draw significant power from the electricity network.
For example, an EV may be charged overnight when solar generation is unavailable. At the same time, the home may be operating air conditioning, electric hot water, cooking equipment & other appliances.
This means the incoming electrical supply must still be capable of supporting expected demand.
Home Batteries Change How Electricity Is Used
Battery storage allows excess solar electricity to be stored for later use. Batteries can reduce electricity drawn from the grid during certain periods, but they also introduce additional electrical equipment into the property.
Battery systems require suitable:
- Switchboard capacity
- Circuit protection
- Cabling
- Isolation equipment
- Inverter connections
- Electrical infrastructure
The overall electrical system should therefore be assessed as one integrated installation rather than treating solar panels, batteries & EV chargers as separate upgrades.
Existing Consumer Mains May Need Upgrading
Consumer mains connect the property’s electrical installation to the electricity supply.
Older properties may have mains cables sized for electrical loads that were typical when the building was originally constructed. These loads can be considerably lower than those created by modern electrification.
Where additional capacity is required, an Underground cable installation Perth property owners arrange may involve replacing or upgrading existing underground consumer mains with appropriately sized cables.
Cable size depends on several factors, including anticipated electrical demand, installation distance, voltage drop, supply configuration & applicable electrical requirements.
Single-Phase Versus Three-Phase Power
Many Perth homes have traditionally operated using single-phase electricity.
As electrical demand increases, some properties may benefit from upgrading to three-phase power.
Three-phase power can provide greater capacity and distribute electrical loads across multiple phases. It may be required or recommended for certain EV chargers, large air conditioning systems, workshops or properties with multiple high-demand electrical appliances.
Whether an upgrade is required depends on the existing supply, expected load & equipment being installed.
Switchboard Capacity Must Also Be Considered
Increasing the capacity of the underground electrical supply does not automatically mean the switchboard is suitable.
Older switchboards may require upgrades to accommodate additional circuits and modern electrical protection equipment.
An assessment may consider:
- Available circuit capacity
- Main switch rating
- Safety switches
- Circuit breakers
- Surge protection
- Cable sizes
- Earthing arrangements
- Metering requirements
The switchboard, consumer mains & incoming electrical supply must work together as a complete system.
Voltage Drop Becomes Important Over Longer Distances
Properties with long distances between the point of supply and the building can experience voltage drop.
This is particularly relevant on:
- Large residential blocks
- Rural properties
- Semi-rural properties
- Workshops located away from the main residence
- Detached garages
- Secondary dwellings
Increasing cable size may be necessary to maintain suitable voltage levels while supporting higher electrical loads.
Proper cable selection is therefore important when planning an Underground cable installation Perth homeowners require for future electrification.
Planning for Future Electrical Demand
Electrical upgrades should consider more than the equipment being installed today.
A homeowner currently installing solar may later add:
- Battery storage
- One or more electric vehicles
- A larger air conditioning system
- Electric hot water
- Induction cooking
- A swimming pool
- A workshop
- Additional accommodation
Planning sufficient electrical capacity during an upgrade can reduce the likelihood of needing another major infrastructure upgrade later.
Underground Power Requires Correct Installation
Underground electrical cables require appropriate installation methods, protection & routing.
Depending on the property, work may involve trenches, conduits, cable protection, switchboard connections & coordination with electricity network requirements.
Underground electrical infrastructure must also be protected from future excavation, landscaping & construction activity.
Using correctly rated electrical cable and approved installation methods helps provide a safe, reliable supply for modern household electrical loads.
When Should Homeowners Consider an Electrical Capacity Assessment?
An electrical assessment should be considered before installing major electrical equipment or substantially increasing household electricity consumption.
This is particularly important when:
- Installing an EV charger
- Adding solar and battery storage
- Converting appliances from gas to electricity
- Installing large air conditioning systems
- Renovating or extending a home
- Adding a workshop or secondary dwelling
- Experiencing electrical supply limitations
- Planning a three-phase upgrade
A licensed Electrician Perth homeowners engage can assess the current infrastructure & determine whether upgrades may be required before additional equipment is connected.
Underground mains installation
Prepare Your Perth Property for Electrification
EV chargers, solar systems, batteries & electric appliances are changing the electrical requirements of Perth homes. Existing consumer mains, switchboards & electrical supplies may not always have sufficient capacity for these additional loads.
Assessing the electrical infrastructure before installing high-demand equipment allows homeowners to identify capacity limitations, plan suitable upgrades & prepare the property for future electrical requirements.
A properly designed electrical supply provides the foundation required to support current equipment while allowing for further electrification as household energy needs continue to change.
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