Burazin/Getty Fears the Iran conflict would trigger a surge in power prices have been unfounded. Why? One factor is the very rapid rollout of home and grid-scale batteries. As a result, Australia’s reliance on expensive gas has fallen and power prices have stayed steady or even fallen. Now it’s time for policymakers and households to look beyond batteries to hot water systems. For the average Australian home, water heating is still the biggest contributor to greenhouse gas emissions (25%). Reli