Why understanding your embedded network electrical capacity is critical for sustainability planning

For strata communities across WA, sustainability initiatives such as PV solar, battery storage (BESS) and EV charging are becoming increasingly important. However, implementing these technologies is not as simple as engaging a supplier and installing new equipment.

The first and most critical step is understanding your building's embedded network electrical capacity.

What is capacity?

Capacity refers to the maximum electrical load your building can safely support at any given time, without risk of overload.

It is determined by several factors, including:

• Incoming supply from the grid

• Western Power infrastructure such as Transformers and main switches

• Cabling and internal distribution infrastructure

• Existing electricity demand from residents and shared services

  
  

What happens if capacity is exceeded?

Exceeding network capacity can lead to:

• Power outages or system instability

• Increased peak demand charges

• The need for costly infrastructure upgrades

For strata properties, this can impact both operational costs and resident experience.

Why does it matter for sustainability?

Adding new technologies changes how energy is used across the building.

For example, if a property has a capacity of 1,000 kVA and already reaches 800 kVA during peak periods, only 200 kVA remains available. Installing multiple EV chargers or additional electrical assets could quickly exceed this limit.

Understanding available capacity ensures that:

• Renewable systems are correctly sized

• Infrastructure can support new demand

• Load management infrastructure is deployed when required

• Future upgrades are planned strategically

How is capacity measured?

Capacity is typically assessed by installing an electrical data logger and/or analysis of whole of site interval data across the embedded network.

Over a short monitoring period, often around 7 days, the data logger records:

• Energy usage

• Demand levels

• Peak load times

• Electrical load profiles

This provides a clear picture of how the building is performing and how much spare capacity is available.

Planning your next steps

For strata managers and councils, having visibility over network capacity is essential to making informed decisions around sustainability and future electrification.

If you are looking to better understand your building's capacity or plan for renewables, EnergyTec can help.

You can also download our white paper, Future-Proofing WA Properties in a Changing Energy Landscape, for further insights.

This article is bought to you by SCA (WA) sponsor EnergyTec.