Ahead of an expected announcement of a new rooftop shingle solar power system today, Tesla unveiled the second iteration of its commercial lithium-ion battery storage system — the Powerpack 2.

The Powerpack 2 doubles the power capacity over the original Powerpack from 100 kilowatt hours (kWh) to 200kWh.

Powerpack 2 is also now matched with a new inverter, designed by Tesla and manufactured at the Gigafactory.

The original Powerpack contained 16 individual battery pods, each with an isolated DC-AC converter. The “pod” architecture and onboard power electronics allowed for individual units to be easily swapped out, Tesla said.

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