This should come as no real surprise, but is very welcome all the same. One senior executive with a global lithium battery manufacturer recently shared with me his opinion that energy density would improve at least 30% annually for some years to come. This level of improvement is game-changign, not just for cost reductions, but also for the ability to expand range in electric vehicles, and duration for stationary energy storage.
Developments in the sector coming at an astonishing rate, yet we are held up by policy decisions and governments whose understanding of the sector is minimal, and whose speed of change is glacial (do we still have glaciers?).
Energy company Tesla has revealed that it began to ship an updated version of its commercial battery storage solution last month, featuring doubled energy density. The upgraded version – dubbed Powerpack 2 in a blog post published late yesterday (27 October) – contains a new energy module and power electronics system which provides twice the energy density as its previous version. The system also comes with a new inverter designed and manufactured by Tesla itself, rather than the previous system which relied upon inverters supplied by Dynapower. Tesla has claimed this “significantly simplifies” the installation of Powerpack systems by integrating a number of components into the inverter while also making the system more cost competitive.