Tesla will release a Powerwall 2.0 this summer. The residential version of Tesla's stationary battery designed for solar energy storage will get a significant update, which Elon Musk touched on ...

Start-up Orison offers a 40-pound at-home battery. That's significantly lighter than Tesla's Powerwall, but it only holds 2.2 kWh of energy. One Orison unit costs $1,600. However, unlike Tesla's ...