Germany, Oct. 29 -- RWE is building Germany's largest battery storage facility to date at the Gundremmingen energy site. The 400-megawatt plant will have a storage capacity of 700 megawatt hours and will use the nuclear power plant's existing grid connection, which is currently being decommissioned. RWE is investing around €230 million in the construction of the new facility. A symbolic ground-breaking ceremony for this flagship project took place today, attended by the Bavarian Minister-President Dr Markus Soder. The Gundremmingen facility is a prime example of RWE's commitment to expanding its battery storage portfolio. It will be capable of supplying electricity continuously for almost two hours at a capacity of 400 MW. More than 2...