Electric vehicle adoption in Australia is accelerating. Fleet operators, property managers, and business owners are increasingly looking at EV charging infrastructure, either to meet tenant or employee demand, future-proof their operations, or position themselves ahead of what is expected to be a rapid shift in the commercial vehicle landscape. Before you install, there are important technical and commercial considerations that will significantly affect the cost, capability, and long-term value of your charging infrastructure.
Not sure which electric vehicles your fleet or tenants are driving? Visit evdex.io for a comprehensive database of EVs available in Australia — including charge rates, connector types, and onboard charger capacity.
1. Understand Your Electrical Supply Capacity First
The single most important pre-installation step is understanding your existing electrical supply capacity. Every EV charger draws power from your main electrical supply, and adding multiple chargers simultaneously can quickly exhaust available capacity, triggering expensive demand charges, requiring costly mains upgrades, or both. A Level 2 AC charger draws 7 to 22kW per charger. Installing 10 chargers without planning could add 70 to 220kW of potential demand to your site. Before specifying charger numbers and types, our team provides an energy consulting and feasibility assessment covering your existing mains capacity, available headroom in your main switchboard, and the potential demand increase from your planned charging infrastructure.
2. Dynamic Load Management Is Not Optional for Multi-Charger Sites
For any site with more than two or three chargers, dynamic load management is essential. A DLM system monitors total site power consumption in real time and dynamically allocates available electrical capacity across connected chargers. Without DLM, if multiple vehicles plug in simultaneously, the combined draw can trip protection devices, trigger demand charges, or require a network capacity upgrade costing tens of thousands of dollars. With DLM, the total available capacity is shared intelligently and each car gets the fastest possible charge consistent with the site’s electrical limits.
3. AC vs DC Charging: Know the Difference
AC Charging — Level 2
AC chargers supply alternating current to the vehicle’s onboard charger, which converts it to DC for the battery. Power outputs range from 3.6kW for single phase to 22kW for three phase. AC charging is typically appropriate for workplace charging, apartment buildings, overnight fleet charging, and anywhere vehicles park for several hours.
DC Fast Charging
DC chargers convert power externally and supply DC directly to the battery, enabling much higher charge rates from 50kW to 350kW and much shorter charge times. DC charging is appropriate for high-turnover public charging locations, transport depots, and fleet operations where vehicles need to be charged and redeployed quickly. DC infrastructure costs significantly more than AC. A 50kW DC charger can cost $25,000 to $50,000 installed, compared to $2,000 to $5,000 for a 7kW AC unit. Check the specifications for your vehicles on evdex.io to confirm whether DC fast charging is supported before specifying hardware.
4. Solar Integration Can Transform the Economics
EV charging and solar power are a natural combination. If your business operates primarily during daylight hours, solar generation during the day can power EV charging at near-zero cost rather than buying electricity from the grid at $0.28 to $0.35 per kWh. Solar-integrated EV charging systems use smart energy management to prioritise solar energy for EV charging, maximising self-consumption and minimising grid imports. Products like Sigenergy’s integrated platform allow your solar system, battery storage, and EV charger to work together intelligently.
Want to understand the financial case for combining solar and EV charging? Read our guide on why Australian businesses are switching to solar in 2025, or explore how much solar can really save your business.
5. Billing and Access Control for Multi-Tenant or Public Sites
For sites where EV charging is provided as a service to tenants, customers, or the public, you will need a system that can control access via RFID cards or app authentication, meter and bill individual charging sessions, report on usage for cost recovery purposes, and integrate with OCPP-compliant back-office platforms for network management. These requirements significantly affect charger selection. Not all chargers support the Open Charge Point Protocol or have robust billing and reporting features. Specifying the right hardware from the start avoids costly retrofitting later.
6. Consider Future-Proofing in Your Design
EV adoption is growing rapidly and your charging demand will likely increase significantly over the next five years. Design your infrastructure with expansion in mind:
- Install conduit runs and cable trays for additional charger positions even if you do not fill them immediately
- Size your main switchboard and sub-boards to accommodate future charger additions
- Choose a DLM platform that scales to your anticipated maximum charger count
- Consider battery storage integration as a future demand management tool
The cost of installing conduit for future charger positions at the same time as your initial installation is a fraction of the cost of cutting new trenches later.
Getting Started
The best starting point for a commercial EV charging project is a site electrical assessment combined with a clear picture of your current and anticipated charging demand. Omni Energy Solutions designs and installs EV charging infrastructure with solar integration across Sydney and NSW for businesses, strata buildings, fleet operators, and commercial property developers.
Plan your EV charging infrastructure properly → Contact Omni Energy Solutions for a site assessment