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It is nonetheless still eye-opening to note just how big those differences in cost are. The average for a turnkey system in China including 1-hour, 2-hour and 4-hour duration BESS was just US$101/kWh. In the US, the average was US$236/kWh and in Europe US$275/kWh, more than double China's average cost.
Factoring in these costs from the beginning ensures there are no unexpected expenses when the battery reaches the end of its useful life. To better understand BESS costs, it's useful to look at the cost per kilowatt-hour (kWh) stored. As of recent data, the average cost of a BESS is approximately $400-$600 per kWh. Here's a simple breakdown:
The principle by which the electricity price is set in the power market is identical to the principle behind determining the prices of general commodities - balance of supply and demand. In Korea's power market, the market price is determined on an hourly basis one day before the actual power transactions take place.
Several factors can influence the cost of a BESS, including: Larger systems cost more, but they often provide better value per kWh due to economies of scale. For instance, utility-scale projects benefit from bulk purchasing and reduced per-unit costs compared to residential installations. Costs can vary depending on where the system is installed.
One recent 16GWh BESS tender run by state-owned EPC firm China Power Construction Group saw bids averaging at US$66.3/kWh while another competitive solicitation from oil and gas firm PetroChina received bids ranging from US$59/kWh to US$139/kWh for the 2.5GWh of contracts on offer, as reported last week by Energy-Storage.news.
“This cost decline has enabled BESS to become the primary technology utilised for power storage amid the advancing global energy transition and growing grid bottlenecks caused by intermittent renewables,” the report read. ALSO READ: Rooftop solar battery attachments up 35.5% in Q4 2023

Power generation industry updates, news, and insights including gas, renewables, coal, nuclear, energy storage, hydrogen, and more.
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