In my understanding a problem often is that electricity isn’t used when renewable electricity sources can provide it. One solution to this is storing it, another (complementary) one is to adjust the usage to times when there is a lot of renewable energy available. This especially makes sense for big consumers (like factories), but a lot of washing machines also sum up to a lot of electricity demand. So we have to adjust to mainly use electricity when it’s available via renewable sources, and this thing can hopefully help with that.