Just like all technology, once you get your energy storage out of the shop and installed in your home, a younger, cheaper and better looking model comes along.
So it is with Elon Musk (where were you three year ago when I was building!) and his Telsa Powerwall. As always, the excellent Renew Economy has the goss (a little tech heavy, but otherwise easy to follow) about how its already revolutionising the energy storage market.
We knew when we installed our $35k lead acid battery bank it would be outdated eventually and it’s kind of good (as well as kind of annoying!) to see it happen so quickly.