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SPS is empowering regional communities

Smart off-grid power solutions for regional WA

Stand-alone power systems are redefining how we deliver power to our remote customers.

As WA is home to one of the largest isolated energy networks in the world, delivering electricity across such a vast network can be challenging. Some customers rely on long stretches of powerlines which can easily be affected by environmental factors - wind, rain, vegetation contact and lightning - so power isn't always reliable and maintaining these lines can be costly.

But stand-alone power systems, or SPS for short, are changing all that.

How does a stand-alone power system work?

As the name suggests, stand-alone power systems are off-grid systems that operate independently from the main electricity network. Each SPS consists of a renewable energy supply such as solar panels, battery energy storage system and, where necessary, a backup generator. This means they are completely self-sufficient power units.

Energy is generated through the solar panels, providing power to the property and keeping the unit’s battery charged for when the sun isn’t shining. The generator kicks in when needed to keep energy flowing. Watch the video to see SPS in action.

What are the benefits of stand-alone power systems?

  • More reliable power – instead of relying on power from long powerlines, SPS provides locally generated, and ultimately more reliable and better quality power to rural customers.
  • Renewable power source – solar panels are the main energy source and any unused solar power is stored in the battery.
  • Improved safety – they safer than poles and wires in remote areas.
  • Reduction in electricity costs – the battery and backup generator keeping power flowing when the sun isn’t shining, reducing any need for electricity from the grid.
  • Lower maintenance costs – SPS allow for the removal of power poles and powerlines which reduces network maintenance costs.
A Western Power SPS unit in a field in Bodallin with solar panels in front of the unit

When did we start installing SPS across WA?

In 2016, we launched a trial at six farming properties in the Great Southern. During the three-year trial, more than 200 hours of outages were avoided.

The trial’s success led to the roll out of an additional 52 units in 2020 and an expected 88 in 2021/22 – but it doesn’t end there.

Our modelling predicts more than 6000 units being deployed over the coming decades.  

Watch the video to find out about the SPS trial.

Why are SPS an ideal energy solution for WA?

With such a vast and isolated network, off-grid systems like the SPS are ideal solutions for remote areas.

But there’s more to it than just being a self-sufficient power unit.

Over the last five years, they have transformed power in regional areas. And with a decentralised and decarbonised energy future ahead of us, SPS are going to be a major player.

  • WA is the perfect place for SPS

    There may be no other place in the world that is as well suited to stand-alone power system technology as WA.

    See why WA is perfect for SPS

  • Why is SPS a game-changer?

    The future for SPS is now. Discover why (and how) SPS will be a major player in WA's energy future. 

    What SPS means for WA’s future

A stand-alone power system in Bondallin

What do customers think about SPS?

For cattle farmer Ken Schlueter (pictured), and wheat and sheep farmer, Tania Willmott, life on farm has been tricky without reliable power.

“When we get a bit of drizzle, then the power can go out for at least a day, said Tania.

Ken and Tania, both located in the Great Southern, experienced power reliability issues due to the long powerlines feeding their properties.

But when they received an SPS, they said a cheery ‘goodbye’ to power outages.

  • The case of the curious cows

    Of all the things that could potentially disrupt power supply to Ken Schlueter’s farm, cows were a new one. Here’s what happened.

    What do Ken’s cows think of SPS?

  • 3 day outage? Not anymore!

    Three day power outages were a feature of life on Tanias farm. But with 3 SPS on her property, farm life is going to change dramatically.

    How 3 SPS will power up Tania’s farm

Here's what our SPS customers said...

“There’s 42km of poles and wires running to that transformer and we’re hoping they will be able to get rid of them as they won’t be needed. We’d be really pleased about that as they are a bushfire risk and a bit of a pain when you are trying to crop around poles...”
Romina Nicoletti
Bonnie Rock
"Buying a generator would have cost us around $10,000, so the timing for getting SPS was good as it saves us on that cost, as well as giving us more reliable power.”
Kelvin & Lara Kent
“As well as giving us better power supply, it would reduce our bushfire risk as the poles and wires in the area won’t need to be used.”
Barry Heydenrych
Boxwood Hill
“I knew about the Ravensthorpe trial and thought it sounded great, so I’d been hoping it would come here. That unit will be enough for the house, given I’ve even got a wood-fired hot water system.”
Ian McKenna
“As well as not having to tidy up around the poles, we don’t need to touch the SPS units. Western Power even come out to check and fill up the back-up generator for us, so we don’t need to touch anything.”
Tania Willmott


  • What is a stand-alone power system or ‘SPS’?
  • How does an SPS work?
  • Who is eligible for SPS?
  • What are the benefits of SPS?

A stand-alone power system or ‘SPS’ is an energy supply unit made up of a renewable energy source or sources, a battery, inverter and, in most cases, back-up generation.  The unit operates independently of the main electricity grid to store and deliver reliable power to a household or business. It remains part of Western Power’s service area, with our business owning the unit and being responsible for the installation and ongoing maintenance.

The main source of stand-alone power system (SPS) generation is renewable energy, such as solar panels. This power is used immediately by the customer and excess power is stored in the battery. The battery has significant capacity to cover a customer’s needs at night and during periods where generation is low (such as several cloudy days in a row).  The system is sized to match the power use of the property to ensure it is fit for purpose.

The job of the inverter is to convert the Direct Current (DC) power to Alternating Current (AC) power appropriate for home and business use. The back-up... Read more

The success of our first stand-alone power system (SPS) trial has resulted in strong interest by regional families and businesses who would love to have their own system.

At this point only those properties identified by Western Power as part of SPS Round 1 can participate in the project.

We have identified the potential participants based on where single or small clusters of customers are located on long, ageing spur lines which are due for replacement; and their annual energy consumption patterns.

SPS projects:

Benefits of stand-alone power systems include:

Reliability and power quality improvements – significantly less power interruptions for customers currently located on long spur lines in regional areas.

Better value – more cost efficient than replacing and maintaining long feeder lines.

Modular – each unit can be augmented to adapt to a customer’s changing energy requirements.

Lowers bushfire risks in regional areas.

Reduction in land access – asset footprint in most cases will be reduced from tens of kilometres to approximately a ten-metre squared installation.

SPS projects:

Great Southern Trial

SPS... Read more

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