Here in EU, day ahead prices that are available to me as consumer are now ranging from €0.18/kWh to €0.34/kWh in the same day (winter). So that is 16 cents per

Here in EU, day ahead prices that are available to me as consumer are now ranging from €0.18/kWh to €0.34/kWh in the same day (winter). So that is 16 cents per kWh diff to profit from. I guess there is some energy loss with charging and de-charging. Since prices a per day, announced the day before, the algorithm is not that complicated. Also, if I install solar panels, the electricity just goes back into the grid, and I would get money for it. For the car it would be the same, just reverse the electricity into the grid. So it is mostly just the connecting the day-ahead prices, plus the cars and wall chargers returning electricity of-course.