BESS
BESS explained
Battery Energy Storage Systems (BESS) play a crucial role in the modern energy landscape by supporting renewable energy sources, such as solar and wind, by ensuring a consistent and reliable power supply—even when the sun isn’t shining or the wind isn’t blowing.

Below is an introductory overview to the typical steps involved with developing and operating a BESS, along with some answers to commonly asked.
How does BESS work?

BESS units store excess energy using advanced battery technologies, typically lithium-ion, and discharge it back into the grid during periods of high demand or low generation. A BESS installation includes large-scale battery banks, inverters, and control systems that manage charging, storage, and distribution, helping to stabilise the grid and improve energy resilience.

As technology progresses, BESS continues to become more efficient, affordable, and scalable. Innovations in battery chemistry, system integration, and energy management software are enhancing storage capacity, extending battery life, and lowering costs—making BESS a key enabler of a cleaner, more flexible, and more reliable energy future.

Components of BESS
0 operational emissions
No combustion, no fuel transport.

Typical Lifecycle

Design development
Developing a new BESS requires considerable planning, research and specialist expertise. The development process is iterative, with the design evolving as new information comes to light – whether it’s related to the site conditions, compliance or feedback from the community or other stakeholders.

Step 1: Identify a site

  • Engaging with landowners
  • Site visit/s
  • Landowner agreements
  • Feasibility studies

Step 2: Energy studies

This phase involves evaluating the site’s energy production potential by undertaking:

  • Solar resource assessment and energy modelling
  • Site investigations and grid connection studies
  • Initial project layout design

Step 3: Specialist studies

  • Biodiversity
  • Landscape and visual impact
  • Heritage
  • Noise
  • Traffic and transport
  • Aviation

Step 4: Planning and environment

  • Applying for development or planning permission
  • Environmental referrals and assessments
  • Engaging with stakeholders including traditional landowners and the community
  • Formal public exhibition and response to submissions process

Step 5: Commercials 
& procurement

  • Completing detailed design of the BESS and associated infrastructure
  • Developing comprehensive plans for construction logistics and operations, including transport route planning
  • Securing funding and making informed investment choices
  • Selecting construction partners

NOTE

It’s critical that the local community is involved in planning for, and decisions about, a new BESS. 
At Avenis, we build long-term partnerships with the communities where we develop and operate projects, engaging with local councils, landowners, neighbours, and surrounding communities as early as possible.

construction
Once plans for a BESS have been approved, it’s onto construction

Depending on the size of the project and the weather conditions, this may take about a year. Throughout this process, it’s important to work closely with landholders, neighbours, local councils, communities, and stakeholders to ensure everyone’s kept informed, and impacts are kept to a minimum.

Stages of construction

1

site preparation

Internal and external access tracks are built, and offsite local roads may be upgraded. Any temporary facilities needed are set up, and environmental protection measures implemented.

2

BESS foundations

Preparing and constructing the structural bases required to support Battery Energy Storage System (BESS) equipment. This typically includes site clearing and grading, detailed surveying, geotechnical verification, and the installation of reinforced concrete slabs or footings designed to carry the weight of battery containers, inverter skids, and transformers. It may also involve installing earthing systems, underground conduits, and drainage around the foundation areas.

3

supporting infrastructure

Installing the systems that enable the battery facility to operate safely, connect to the grid, and be monitored effectively. This includes laying underground power and control cabling, constructing internal access roads and drainage, installing transformers, switchgear, and protection systems, and integrating fire detection and suppression systems specific to battery safety requirements. It also covers perimeter fencing, security, lighting, and communications infrastructure, along with grid connection works to substations.

4

BESS assembly

Installing and integrating the core battery system components onto the completed foundations. This includes positioning and securing battery containers or cabinets, installing inverter and power conversion system (PCS) units, and completing all DC and AC electrical connections between batteries, inverters, transformers, and switchgear. Control wiring, communications systems, and the battery management system (BMS) are also installed and configured.

5

electrical connections

Underground fibre optic cables and overhead transmission lines are installed, connecting BESS substation to the grid.

6

Commissioning

BESS are commissioned individually to start generating power; temporary buildings and access tracks are removed and the ground rehabilitated.

economic, environmental and social benefits
At Avenis, we’re committed to developing high quality renewable energy projects that are good for landowners, good for communities and good for the country. Here’s an overview of some of the benefits that a BESS can deliver.

Good for the environment

  • Reduced greenhouse gas emissions
  • Improved air quality
  • Renewable & sustainable
  • Low construction impact

Good for the community

Tailored programs that share benefits with the local community.

Good for the local economy

  • Employment opportunities
  • Demand for goods and services
  • Partnership potential
operation
BESS are designed for long-term operation—typically 25 to 30 years. A dedicated team, either based on-site or within the region, is responsible for ongoing operations, maintenance, and monitoring throughout the project’s life.
Do BESS cause health problems?
Will electromagnetic interference affect my TV reception?
What if a BESS catches fire?
Could a BESS make fighting a bushfire harder?
What is the carbon payback for a BESS?
What does maximum output mean?
What happens to a BESS at the end of the operational phase?
What does decommissioning involve?
Who is responsible for decommissioning?
If you would like to know more about Avenis Energy, have an enquiry or would like to partner with us, please get in touch.
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