Blockchain == energy wastage.
Bit ironic to have a system where people can save costs on energy yet waste energy on the payment system.
The concept of sharing the solar panels is fairly sound. The article by the ABC gets sketchy towards the meat of their payment/sharing system which suggests that it is not as good as it suggests.
It is possible that they are running into some obscure state law that from memory prevents people become power suppliers/company in their own right without all the registrations etc. And this is hindering their system. While it is trialing the state government is sitting back and watching, but they both know when it takes off the State govn will jump in and extract their blood.
On your own property or multi-dwelling estate it is legal (at least in QLD) to share power.
This idea (without blockchain) of sharing power will be great for apartment/multi-dwelling blocks/estates where there are plenty of roofs and a variety of power usages. I suspect that if people are not greedy that they could even 1/4 the daytime power costs.
Add a battery system maintained by the “community” then even night time usage can be covered if enough power is generated.
Then the community can have a single feed in from the power authority and cut over to mains power when needed. Each household has its own meter which is owned by the community and costs apportioned according to the usage and costs of batteries.