[sendler]

I read everything you posted and there is some information (intentionally?) missing. The chart showing the wholesale pricing going down 20 minutes after the battery started to contribute 35 MW indicates to me that SA must have several small interconnected grids that bill to a small area independently and they are showing the price change for this small area. This is the only explanation as to how injecting such a small amount of power could have any effect at all. There is no way that a 35MW addition can have ANY meaningful influence on a 2 GW load. But, if the gas companies have quit gouging for their stabilization services during shortages because they don't want to leave the door open for more battery installations that may eventually reach a level that does add up to something substantial, then it has made a good accomplishment.