The Big Canberra Battery

The Australian Capital Territory’s Big Canberra Battery has commenced operations. This large-scale grid energy storage system can back up the electricity grid in just milliseconds, helping prevent blackouts.

The Williamsdale BESS will participate in the National Electricity Market – charging when renewables are abundant and prices are low, and discharging during peak demand. It will also provide essential system security services.

1. Sony Fortelion

Using olivine-type lithium iron phosphate, Sony is able to achieve a long useful life by optimizing the cathode material and achieving a high power density of 1800W/kg. By leveraging the proprietary particle design technology and cell structure design technology Sony accrued developing its current lithium ion secondary battery line-up, the new Fortelion battery delivers both high capacity and fast charging.

In the Canberra Battery Test Centre’s Phase 1 testing this battery performed well with a consistent performance, with the only issue being it was not able to charge at the expected rate. However this is now fixed.

It uses the Sonnen battery cells and is compatible with their inverters. Unlike the Ampetus Super Lithium or Aquion Saltwater Battery that have issues, this one appears to be a reliable choice for hybrid solar with batteries.

2. Pylontech

Pylontech, formally Pylon Technologies Limited, are a dedicated supplier of energy storage systems. They have grown from a Chinese manufacturer to one of the leading home battery suppliers in Australia.

The 48V 3.5kWh US3000C LiFePO4 is a server rack-mounted, highly efficient energy storage solution for off grid tiny homes and cabins, as well as battery backup hybrid renewable energy systems. The lithium iron phosphate cathode is less reactive than the cobalt oxide used in other batteries. This allows heat to dissipate more efficiently and significantly reduce the risk of fire hazard.

The US series of batteries are modular, which allows the nominal capacity to be scaled up to 14kWh. According to data from the Australian ITP Battery Test Center, the US2000B battery performed consistently during accelerated testing over 4 years.

3. Aquion

The Aquion is a large-scale, grid connected battery that can store enough renewable energy to power one third of Canberra for two hours during peak demand periods. It is expected to future proof the ACT’s electricity network and prevent blackouts.

Its salt water design allows it to operate from -5 to 40degC and is unlikely to freeze, even in the coldest Canberra winters. Even if it did, it would thaw out again before any damage was done.

It also has a low carbon footprint. While lithium-ion batteries emit a lot of CO2 during their manufacture, Aquion batteries emit only about 2kg of CO2 per kg of usable capacity. This is because most of the battery’s weight consists of salt and water. It can also provide essential system services which help keep the grid operating smoothly.

4. Sinlion

Home batteries are not yet at the stage where they can be bought and installed like dishwashers or air conditioners. Buyers need to be aware that they might not work as expected. The Canberra Battery Test Centre has shown that not all of the home batteries on the market are reliable.

The Sonnen original in Phase 3 testing had some initial problems with getting ‘stuck’ and its internal DC breaker repeatedly tripping. But once these issues were resolved, it operated well until the end of the trial in 2022 with no significant capacity loss.

The Aquion Aspen had some problems with the ITP Renewables team being unable to fully set it up with an inverter, but the battery was operating at the end of the testing period without any faults. However, the manufacturer went bust and it’s not clear if they’ll honour warranties for existing customers.

5. Neoen

Neoen is one of the world’s leading renewable energy companies. Its portfolio of 20 assets in operation or under construction comprises 2 GW of generation capacity evenly split between solar and wind and 1.3 GW / 2.8 GWh of battery storage. Neoen’s homegrown expertise across solar, wind and storage unlocks efficiencies and allows it to deliver projects of increasing scale and complexity.

The company’s portfolio of projects is complemented by an advanced pipeline, which at year-end 2022 amounted to 11.9 GW. This includes 2.0 GW of tender-ready projects.

Australia makes up a significant chunk of its works under construction, including the Big Canberra Battery (250 MW / 500 MWh), in partnership with Eku Energy, the first of its kind in the country. It will address network constraints, enable more Canberrans to go solar and shorten the pay-off period for residential batteries.



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