General GNX News, page-140

I would think that something similar to the arrangement that the owners of the Hornsdale Wind Farm and the Tesla battery has in South Australia would serve GNX well.

"The Hornsdale operator uses around 30MW/90MWh in the wholesale market as a form of price arbitrage, balancing wind output from the neighbouring Hornsdale wind farms, taking advantage of spikes and dips, generating when supply gets tight, and making micro adjustments to supply and demand.

The rest of the battery – around 70MW, 39MWh – is contracted by the South Australia government specifically to deliver “network” services, such as frequency control at a time of system faults and problems."

http://reneweconomy.com.au/tesla-big-battery-moves-from-show-boating-to-money-making-93955/