Understanding Load Management Systems for EV Charging

Navigate the complexities of installing load management systems for efficient EV charging. Understand costs, pros, cons, and compatibility with various chargers.

Load management systems are designed to regulate the energy consumption of EV chargers within a building's existing electrical infrastructure. By controlling the power draw, these systems prevent circuit overloads and potential power outages. This is especially important in strata buildings where multiple residents might charge their EVs simultaneously.

Options for Load Management

There are a variety of solutions available, each varying in complexity, capability, and cost. Here’s a breakdown of the most common types:

Branded Solutions:

How They Work: Integrated within certain EV chargers, these systems allow chargers to communicate with each other via WiFi or a data cable. They manage the total power draw, ensuring it doesn't exceed a preset limit based on the building’s electrical capacity.

Cost: $$


  • Cost-effective
  • Simple to implement if all units use compatible chargers


  • Requires all chargers to be of the same brand and connected to the same circuit
  • Often limits the number of chargers that can be connected
  • May require setting a lower max power limit during peak times

3rd Party Load Management Systems:

How They Work: These systems use a central control unit compatible with any charger that supports the Open Charge Point Protocol (OCPP). They include Current Transformer (CT) sensors on incoming mains to dynamically measure and manage available power, optimizing the charging process.

Cost: $$$$


  • Allows for faster charging by optimizing power distribution
  • Compatible with a wider range of charger models
  • Can connect an unlimited number of chargers


  • Higher initial cost due to additional hardware
  • Installation may require running data cables to each charger

Implementing Load Management in Strata Buildings

When choosing a load management system for a strata building, it’s important to consider the total number of EVs expected to use the system, the existing electrical infrastructure, and the budget constraints of the strata council. For smaller buildings, systems that link EV chargers to individual residential meters might be viable. Such systems might bypass the need for complex load management but still ensure that usage costs are fairly allocated.

For strata buildings looking into comprehensive EV charging solutions, engaging with a specialist like Evergreen Electrical can provide tailored advice and installation services. This approach ensures not only the compatibility of the load management system with the building’s needs but also adherence to all safety and compliance regulations. Evergreen’s expertise in electrical solutions for both residential and commercial settings makes them a valuable partner in transitioning to sustainable energy practices.

As more residents move towards electric vehicles, the implementation of an effective load management system becomes a critical component of the infrastructure in strata buildings. By choosing the right system, buildings can avoid power supply issues, enhance property value, and support the transition to clean energy.

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