In addition some locations, like where I live, utilities only provide TOU rates for EV owners. These decrease electricity rates overnight so you can charge for cheaper when the grid has excess capacity. These decrease electricity upside is you can run tons of things overnight to take advantage of this (dishwashers, laundry, even your AC to overcool your home). Combine that with solar net metering that pays the standard rate due to the power being generated during peak loads and it can be huge savings, all just for owning an EV.