Tesla has let slip details on its first significant Powerpack upgrade.

Powerpack 2 …perhaps not the catchiest title, but it gets the job done.

The most significant change is in the energy density of the industrial-grade energy storage system, which has doubled – enabling 200 kWh of storage and an output rating of 50 kW.

Version 2.0 of the Powerpack also has a new Gigafactory-built inverter, a package the company says "is the lowest cost, highest efficiency and highest power density utility-scale inverter on the market," while being easier to install than the previous generation.

The units actually started shipping in September, and Tesla notes that it has already delivered over 300 MWh worth of battery storage to ~18 countries.

Here is Tesla's blog update in its entirety:

Gaining Momentum with Tesla Powerpack