The first instalment is a 3.2MW battery facility at the 122MW Princess Alexia onshore wind farm near Amsterdam in the Netherlands.
Each battery, usually used in BMW's i3 electric car, has a storage capacity of 33kWh and is to be controlled using a BMW-owned battery management system.
Elsewhere, pending a final investment decision, a 22MW battery facility is also planned for the 230MW Pen y Cymoedd project in south Wales, Vattenfall said.
The storage project will supply the UK's enhanced frequency response service to stabilise the grid system.
In a third planned project, Vattenfall, the Hamburg University of Applied Sciences (HAW) and turbine manufacturer Nordex will develop a large battery storage system.
The project will supply balancing power to support transmission grid operations at a planned wind project in Hamburg-Bergedorf, Germany, Vattenfall added.
The Swedish utility is also "supporting plans to build Europe's largest lithium battery factory in Sweden" with a SEK 5 million (€0.53 million) investment in project company Northvolt, it said in early March.