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 ...

If you’re ready to invest in a Tesla Powerwall but you’re not quite sure which model to choose, our CNET experts have got you covered. The Tesla Powerwall 2 has been the most popular home ...