The global grid capacity by 2050 will have to increase by three times.

到2050年，全球电网容量必须增加三倍。

But it could be difficult for some states to deal with limited electricity grid capacity and shortages of materials to build the stations.

但对于一些州来说，要解决电网容量有限和建设充电站所需材料短缺的问题可能会很困难。