FAQs

While this statement is an oversimplification of the process, it is true that at certain times of day and during certain periods of the year, not all the solar power being generated can be used by the grid. The Alice Springs electricity system is heavily reliant upon gas generation – not only for power, but also to provide essential system services (ESS) such as voltage control, frequency, and inertia. These services can be provided by technical solutions like batteries, but at this stage this is a prohibitively expensive means of addressing the problem in its entirety. The aim of the Alice Springs Future Grid’s Roadmap to 2030 is to provide information on how more renewables can be tied into the use of gas generators at the main power stations.

Alice Springs has predominantly been powered by two power stations operated by Territory Generation: Owen Springs and Ron Goodin. These two power stations consist of a fleet of conventional generators, fuelled by gas or diesel, which are ‘dispatched’ in a manner that ensures supply perfectly matches customer demand every second of the year.

In the 2021‑22 reporting period, total conventional generation capacity was 122.6 MW and operational maximum demand was 48.6 MW, not including requirements for system redundancy. It is noteworthy, however, that while the Ron Goodin power station is aged, it remains available for system redundancy. No definitive retirement date has been announced.

Over recent years, more than 25% of the approximately 9,000 households in Alice Springs have installed DPV on their property rooftops.

The maximum output capacity of all residential DPV systems in Alice Springs is estimated to be 23 MW, and historical generation data suggests in the order of a 9% contribution to overall consumption. Fossil fuel-based generation produced 87% of annual volume and centralised Renewable Generation produced 4%.

You don’t need 3-phase power to charge an EV. In fact, you can purchase charging cables that plug into a standard domestic socket. The most common way to charge an EV is via a "type 2" charger, and many EV drivers will opt to have a charging point installed in their home. A 3-phase connection will charge your car more quickly. A single phase type 2 connection will be slower than 3-phase but faster than your standard household sockets. Your local solar installer or electrician can assist with questions specific to your case. The cost of the charge will depend on the general cost of electricity, the capacity of the vehicle’s batteries, and whether you’re incorporating solar power. A fuel cost savings calculator can be found on myelectriccar.com.au, with plentiful similar resources available elsewhere online.

There are enough chargers along the highway to comfortably travel the length of Australia. There are a surprising number of charging points all over Australia, including in some incredibly remote locations, such as Kiwirrkurra, which is one of the most remote settlements on the planet! It is easy to view the full range of charging points on the app PlugShare.

The Battery Energy Storage System (BESS) in Alice Springs is designed to provide grid stability services. This is much needed, as the town has a high proportion of rooftop solar PV, which can create challenges in the grid during periods of high cloud coverage, requiring thermal generation to react as quickly as possible to pick up the slack. In these instances, the BESS can almost immediately support the grid while thermal generation ramps up or down. If it were to be used purely for storage, the battery would last about 40 minutes. Proportional to the size of the Alice Springs grid, it is the biggest battery in Australia. This perhaps illustrates why centralised battery storage alone isn’t a viable solution to support high renewable penetration in a town like Alice, just yet.

Ron Goodin Power Station, located near the centre of Alice Springs, was commissioned in 1973. Some of its generators are the oldest of their type operating in the world. Territory Generation completed an expansion of its Owen Springs Power Station in February 2019, so is transitioning the main generation capability to this location, 26km south of Alice Springs and away from residential areas. Thermal power stations typically have a lifetime of 30-50 years.

It’s absolutely feasible before 2030 that we can work towards operation at 100% renewable energy at certain times of the day or year. This was a scenario modelled as part of the Roadmap to 2030. However, how frequently we do that and for how long will then become a question of economics and power system stability.

Solar is currently the only commercially viable renewable resource in Central Australia, and to reach 100% solar would require a very large (and prohibitively expensive) battery, to cover the overnight periods. Learning how to provide Essential System Services through renewable energy technologies is crucial to reaching 100% solar during the day. Future Grid's Wind Monitoring Study demonstrated that it may be possible diversify the Alice Springs energy portfolio. Although on its own it may be more expensive than the typical cost of wind generation in Australia, due to the poorer overall wind resources, it has a notable degree of solar/wind resource complementarity. That is the wind resource is most abundant in the late afternoon and evening when solar generation potential is significantly below maximum demand. Other factors that could assist - but are outside the scope of Alice Springs Future Grid - include the adoption of electric vehicles and their integration into the grid, and the development of a green hydrogen industry.

The Future Grid car was an electric vehicle (a Nissan Leaf) and there were individuals in the team and community who were highly enthused about this technology. However, operating within a constrained budget and timeline, electric vehicles or related trials were not considered as part of the project. The team designed a series of interdependent activities that served to consider immediate issues in the system and support further renewable energy penetration into the Alice Springs grid in a cost-effective and realistic way. These interventions made use of and optimise existing grid infrastructure, which is a valuable public asset. The Future Grid team always welcomed any future or parallel projects that supported the increased use of electric vehicles in Alice Springs or focused on the integration of this technology as another means of supporting the grid.

Alice Springs has a strong history of solar energy innovation and many smart minds have considered this idea. It is accepted that the volume of water required to build a large enough hydro plant is beyond what is feasible. A smaller plant could be built, but it would have no material value.

Any technology that relies upon water in Central Australia is naturally problematic because the region is arid and relies upon a finite source of groundwater. This is why hydrogen isn’t an ideal solution in this area of Australia.

Other considerations relating to ideas of this nature are native title and the Sacred Sites Act, governing the protection of the West MacDonnell ranges and other areas around Alice Springs. However, these cannot be considered as barriers given the absence of technical feasibility for this idea.

Alice Springs is already home to a large-scale Battery Energy Storage System (BESS) owned by Territory Generation and installed at the Ron Goodin Power Station. The BESS was commissioned in 2018 and at the time was the largest battery, proportional to the grid it served, in Australia. The BESS is 5MW and cost about $8m. It is optimised for grid support services (such as inertia, as outlined elsewhere) and is not sufficient to support the grid in terms of energy storage. If optimised to provide energy storage rather than grid support the battery could service the energy needs of Alice Springs for no longer than 20 minutes.

The Roadmap to 2030 has considered where new battery energy storage systems could be placed and their functions. It is likely that at least three systems would be needed, at strategic locations around town to support the grid.