Don’t know if it’s really feasible but for scaling (just like in computing and datacentering etc) we need a lot other legislation, more standardization for a smarter grid I guess then now AND make it “Plug & Play” so the required expertise to install and configure comes down.

One example here in NL is HomeWizard home battery because it’s just max 800W one can just plug it in. (In order to have more in one appliance we need other compliance regulation)