The battery storage systems are the developing solutions for effectively integrate a large volume of solar and wind renewables into global power systems
FREMONT, CA: The battery storage systems are evolving as one of the primary solutions for efficiently incorporating large proportions of solar and wind renewables into global power systems. The latest study by the International Renewable Energy Agency (IRENA) shows how electricity storage systems can be utilized for a wide range of power sector applications, from e-mobility and behind-the-meter applications to utility-scale use cases.
For example, utility-scale batteries will allow greater feed-in of renewables into the grid by storing excess generation and reinforcement of renewable energy production. In addition, batteries help offer reliable and affordable electricity in isolated grid and off-grid communities, especially when coupled with renewable generators that otherwise depend on expensive imported diesel fuel for electricity generation.
In Australia, Germany, Japan, the United Kingdom, the United States, and other European countries, utility-scale battery storage systems are currently being implemented. The Tesla 100 MW / 129 MWh Li-ion battery storage project at Hornsdale Wind Farm in Australia is one of the largest structures in terms of capacity. An elevated demonstration project in the US state of New York that used a 4 MW / 40 MWh battery storage system showed that the operator could eliminate almost 400 hours of power grid congestion and save up to USD 2.03 million in fuel costs.
In order to balance the grid and store excess renewable energy, many island and off-grid communities have also developed large-scale battery storage. The production of a solar PV farm is funded by a 2 MWh energy storage unit in a mini-grid battery project in Martinique, guaranteeing that electricity is pumped into the grid at a consistent speed, eliminating the requirement back-up generation. Nearly 130 MWh of battery storage systems have been implemented in Hawaii to offer solar PV and wind power smoothening services. Utility-scale stationary batteries control the storage of global electricity. Yet small-scale battery storage is projected to increase by 2030, combining applications on the utility-scale.
The behind-the-meter (BTM) batteries are attached to commercial, industrial or residential customers behind the power meter, mainly aimed at saving electricity bills. BTM battery installations worldwide are increasing. The demand increased as the amount reduced of the battery storage technology, due to the increasing consumer demand and the growth of electric vehicles (EVs), plug-in hybrid EVs (PHEVs), implementation of distributed renewable energy generation, and the development of smart grids.
For example, in Germany, BTM batteries have been installed in 40 percent of recent rooftop solar PV applications. Australia plans to hit one million installations of BTM batteries by 2025, with 21,000 installations in the country in 2017. Therefore, in stationary applications, total battery capacity can improve from the present estimate of 11 GWh to between 180 and 420 GWh, a 17- to 38-fold increase.