in november 2009, statnett and energinet.dk signed the agreement to construct skagerrak 4. the capacity of skagerrak 4 is approximately 700 mw. it had been in a test phase since 1 october 2014 and became operational at the end of 2014, when strong winds created negative prices despite the new connection. it was officially inaugurated by frederik, crown prince of denmark and haakon, crown prince of norway on 12 march 2015. as for the existing skagerrak 1-3, the grid connection points are kristiansand and tjele. differently from skagerrak 1–3, for skagerrak 4 a cable solution is chosen for the complete route length. the 300 million dkk prysmian land cable on the danish side is approximately , while the subsea cable and the norwegian land cable is to be made by nexans for 638 million dkk. converter stations were built by abb, as for skagerrak 1–3. the combined budget is 2.8-3.2 billion dkk.