Ah! It was grumbling that the feeds didn’t exist when I first set it up. I suspect I’d not fully set the input feeds/clicked ok and was tab switching and adding input processing to create something unnecessary;)
After a day or two of feed fiddling I now have MyElectricFlow setup nicely, it turned out needed to invert my battery charge/discharge feed. Great work all!
I’m two weeks into my 32kWh Fogstar on a 8kVA Victron Multiplus. I think someone else mentioned, the holy grail would be a single app that integrated ASHP as well, but I suspect the graph overlaying might get a bit too busy 
Nice! great to see @tommyt! what tariff and battery control approach are you taking?
I’m on Go.
For summer, I’ve got the battery charging to 55% off peak. In winter that will be 100%