If the ride is more than 40 miles, then batteries need to be charged by the ICE. If you want to go back home and improve your VOLT efficiency, then just push a "Go back home" button (it could be an option).
Then, the VOLT computer will know that you want to go back home and it will keep the state of charge at 20% capacity instead 30%.
Then the efficiency would be increased by 10% because the plug-in electric power would charge the battery from 20% to 80% (60%) instead from 30% to 80% (50%).
Then, the VOLT computer will know that you want to go back home and it will keep the state of charge at 20% capacity instead 30%.
Then the efficiency would be increased by 10% because the plug-in electric power would charge the battery from 20% to 80% (60%) instead from 30% to 80% (50%).