Spanish renewable energy company ACCIONA Energy have just announced (in a slightly strange translation into English) that they have:
Materialized the first European experience of real operation of a grid-connected photovoltaic plant on an industrial scale with energy storage in batteries.
In somewhat plainer English, ACCIONA have installed a 1.1 MW / 560 kWh modular lithium-ion battery system supplied by French battery manufacturer Saft at their existing 1.18 MWp solar photovoltaic site at Tudela in the Navarre region of northern Spain. Please note that Navarre currently obtains most of its electricity from renewable sources, unlike the rest of Europe!
Saft 560 kWh modular lithium-ion battery system