Today’s graph shows both versions of the Powerwall 2 are well ahead of the closest competition on price, beating its closest rivals by one third.

In April, harnessing the power of 15 electric Mini Coopers, they demonstrated the ability to make $5 a day — over $1,800 per year — just by slightly charging and discharging a car’s battery ...

The power electronics hub was programmed to autonomously manage the power flow of all these electrical loads, helping prevent fluctuations in supply and demand on the wider electrical grid.

The utility increases or decreases its supply of power to meet demand at every moment in time. With a two-way grid, the utility could manage demand, too, by turning off power-using devices in ...