In 2018 approximately 11 million solar panels are expected to have been installed Australia wide from residential and commercial applications alike.

The combination of decreased system costs and increases to electricity prices has resulted in the uptake of solar increasing drastically over the years, attached below the RAC have made a great video showing how the solar boom has spread across Western Australia.

https://www.youtube.com/attribution_link?a=vlsj0Txr278&u=%2Fwatch%3Fv%3Dl3NR4ZTxoXM%26feature%3Dshare