Good numbers on the power sold, I did a similar calc and was a bit disappointed by the gross income from WP, stuffed one of my previous posts.
That said, looking at the infrastructure that Wilga Park is supplying, something I didn't take into account was that between the reverse osmosis plant (a very big electricity user) and the pumps themselves there wouldn't be a lot of spare juice left out of the 7MW installed, therefore when WP is up and running at 40MW it could be assumed that about 25% or more of that power would be used to run the pumps and reverse osmosis system.
Seems we aren't going to be able to determine much from the $224,000 number which is a shame I liked your reverse engineering I thought that was good 'lateral thinking'!
ESG Price at posting:
90.5¢ Sentiment: LT Buy Disclosure: Held