Not sure I quite understand what you are trying to say, I import cheaply from the grid (20kw of battery, 77kw ev 61kw ev) at 6.5p per Kw.
Solar + battery run my house for the rest of the day exporting to the grid when in surplus (export =15.5p per kw).
Now I am on a smart tariff I want to see if the house batteries can make use of the smart charge aswell as both cars!