It could be a while before you see this sort of battery station elsewhere on SCE's network, no matter how successful the test may be. The batteries are only supporting a substation in a small town. It would take a considerably larger effort to support a major city, and even China's record-setting storage system tops out at 36 megawatt-hours. However, it's still an important step toward bringing eco-friendly energy to many more people -- eventually, you might not have to be picky about where you live (or use your own generators) in order to get all your power from renewable resources.