Congratulations Allume Energy who have recently commissioned their first "multiple behind the meter" PV installation, where several apartments share a single solar PV system - using existing smart meters. Cool technology and enabling low cost solar electricity for apartment dwellers - both renters and owners.
The peak body from Australia's electricity distributors, Electricity Networks Australia, together with CSIRO, have recently released their report on the journey to zero net emissions by 2050. Bottom line? It's all do-able and cost effective as long as we set out and follow a reasonable plan "With a clear Roadmap, Australia’s electricity sector can outperform current abatement targets, keep the lights on and deliver lower costs". The requirement for storage (e.g. batteries, pumped hydro) on the grid ends up being less than many people anticipate. Well worth a read.