Australia has installed over 12,000MWh of both utility-scale and government-subsidised household batteries in the past 12 months, leading to a significant and profound impact on spot market prices, and general dispatch of the grid. Together with the 16,000MW of installed rooftop PV in a market that aerages 20-25GW a day, the impact of lower energy use and reduced volatility has seen increased curtailment of wind and solar generation, leading to a general downturn in investment outcomes. And whilst coal generation has decreased, the increased battery operation has reduced both gas and hydro generation. This paper will explore these impacts and the challenges associated with targeting 100% renewable grid outcomes.