Australian Battery Tech Working in Utility Market: But Tesla Batt Day Suggests Hornsdale & Other Battery Sources & Types to be Tested & Possibly Utilized.

In spite of success and utilization of the Hornsdale batteries, there seems to be Tesla need for more power & long charge.
Number of other battery technologies are in development.
Battery costs continuing to fall & renewable power sources proliferating.
Cobalt-free iron phosphate design that could cost as little as $80 per kWh.
Tesla hoping batteries can function for million miles before being replaced.