> which needs to be stored. Not necessarily, at least not always. It needs to be used and this can be made possible by expanding the high voltage networks. T

> which needs to be stored. Not necessarily, at least not always. It needs to be used and this can be made possible by expanding the high voltage networks. This would be especially effective in the east-west direction because then areas with sun could supply areas where it is dark. This reduces the need for storage while also making the system more robust. If we add more north-south interconnects we can use some of the Scandinavian hydro plants as batteries (I agree that pumped storage can never be as extensive as one would like and is not as easily achieved as some people think) and North Africa for solar power. What is most lacking is not new technology but political will to interconnect the electrical supply network so that energy can flow more easily from where it is produced to where it is needed.