"millions of small ones up and down the country" this is assuming the majority of people will get electric cars which I am not seeing, since the biggest problem has not only not been solved, it has not even appeared on the radar: where to charge all these cars? Everyone seems to assume everyone has their own house with a garage...,(reply>), @He rr Gamer Have a look at how those batteries are built into cars (especially the teslas) and how heavy they are. I think the most practical solution that we will be seeing (if it turns out to be technically feasible) will be flow batteries.,(reply>), Once electric cars are a large enough market, I very much hope that gas stations will start stocking pre-loaded batteries, so you give them your empty one, and they give you a full one in return for some money.,(reply>), Should Teslas home batterys see widespread adoption, the proposed solution could work easily.<br><br>And the issue of charging electric cars, currently a full charge using one of the Tesla Super charging station takes around 75 minutes.<br><br>A 50% charge around 20. (both assuming highest capacity battery currently available)<br><br>This will probably be reduced by quite a bit in the next couple of years.,(reply>), Well I figure he meant that the batteries would only be used during emergency situations to power houses for a few seconds or minutes. Tesla is currently designing batteries specifically for home use for people to get off the grid, by using it to collect and contain solar energy. If the panels aren't getting any energy, then the tesla battery will help with the slack. The concept here is basically the same. <br>Also the superchargers are only beginning to be built, as Tesla is still a young company in comparison to the gasoline powered car industry, which has been around for over a century. Eventually tesla (and other car companies that will inevitably move to electric) will have built charging stations that reach out to even the most rural areas, or will have made home charging stations more accessible. Im sure back when horses were still in wide use, there were a lot more stores that sold horse feed than there were that sold gasoline, and to the average horseman they'd think it's pretty silly to go all that way out to get gas when horse feed stores are everywhere. Give tesla time, and i'm sure they will surprise you with how far they will take the auto and power industry.,(reply>), Besides, driving to the charging station and then home doesn't provide the "millions of batteries connected to the grid" solution Tom talks about. It only works when those millions of cars are all the time connected to the grid.