NSW Batteries Seize the Opportunity in May Price Spikes

Last week marked the best-performing week of 2025 for BESS in NSW, delivering more than $2.2 million in market revenue across the week. Spot prices surged past $10,000/MWh across multiple intervals in 3 different days, creating a strong opportunity for batteries to extract great value from the market.

 

We analysed several Scheduled BESS in NSW to see how they responded during these price spikes – see charts below for a breakdown of their dispatch outcomes.

 

The price spikes mostly occurred in the early evening, after solar generation had fallen but while demand was still ramping up. So, most batteries were near full state-of-charge from midday charging, enabling them to discharge at full capacity just as prices spiked.

 

On 13th May alone, these batteries earned a combined $1.6 million in a single day.

 

The 2025 revenue patterns in NSW are a clear reminder of the lumpy nature of battery revenue: while average daily revenue for NSW BESS from January to May was around $50k, some volatile days contributed a disproportionately large share of total earnings.

 

With winter driving up demand, we’re likely to see more price spikes – and more standout days for batteries.

 

Want to track BESS performance across different assets and NEM regions? Check out OpenBESS, our free-access platform!