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 ...

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.

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 state Public Utilities Commission approved a first step in Hawaiian Electric Cos. effort to transform its one-way power supply grid into a two-way power and information platform, the utility ...