The long and quiet history of Tesla’s grid batteries – Fortune

It’s an effort that’s five years in the making.By now it’s not really a secret that on Thursday, Tesla Motors will likely show off battery packs that can be paired with solar panels, and plugged into the power grid. But what seems to be lesser known is the long history behind this announcement: That Tesla TSLA -0.46% has been working on grid batteries for many years now and already has hundreds of systems in operation.

Source: The long and quiet history of Tesla’s grid batteries – Fortune