‘Two green-dream fantasies are heading for a massive and costly collision.
Firstly they dream of generating all grid power from wind/solar propped up by battery storage (such as lots of giant Tesla batteries and pumped hydro).
Secondly they dream of replacing all petrol/diesel/gas cars, trucks and buses with electric vehicles, powered by more batteries.
But wind farms do well if they can average about 35% of their rated capacity with low predictability, while solar panels average just 25% of their capacity, produced intermittently. To generate zero emissions energy for Australia, we would need hills covered with turbines, flats covered with solar panels, the countryside spider-webbed with access roads and transmission lines, and much more hydro.
To stabilise a green energy system without using hydrocarbons will require an eye-watering quantity of batteries, costing as much as 200 times the cost of any wind/solar facility needing backup. Every home will need a battery in the basement (and sensible ones will also have a diesel in the shed).
Add to this battery bonanza millions of batteries will be needed to electrify and replace our fleet of petrol/diesel vehicles.’