Some cool cheap electricity suppliers Work:
Old-school electric car plug, ca. 1913
Image by Argonne National Laboratory
By way of wise grid technology, you could plug your car and your residence appliances into the electric outlet--and it would "talk" with electricity suppliers to arrange the most handy or least expensive way to power your residence.
These days manufacturers are meeting to agree on a standard plug for the residence hub, automobiles and appliances.
BUT it turns out