11 home batteries that rival Tesla's Powerwall 2.0

Musk unveiled the new version of its at-home battery, Powerwall 2.0, on Friday night. The battery comes with technical and design improvements from its predecessor, but it also speaks to Tesla's larger vision for energy. Musk wants to bring solar installation and battery installation, two processes that inherently rely on each other, together as one simple, integrated process.

Part of that vision involves Tesla merging with SolarCity, a controversial deal worth $2.6 billion, which shareholders will vote on November 17.

At-home batteries can store electricity generated by solar panels and draw electricity from the utility grid when rates are low to store for later use. They also provide homeowners with backup power in the event of an outage.

But Tesla isn't the only company offering an at-home battery solution.

Here's a closer look at Tesla's Powerwall 2.0 and its competition.