[prawn]

FWIW, I forwarded the article and these comments to my friend who works in the energy sector in South Australia. His comment:

"The comments talk about electric cars effectively being used as batteries to help supply the grid during peak times which is a concept I haven’t heard of. Electric cars being plugged in overnight to increase the night-time demand would certainly help as you would significantly increase the base-load demand, thereby improving the load factor of the network. This then distributes the fixed infrastructure costs over a higher number of kWh lowering the per/unit cost of energy."