Identifying and creating "current rate" sensors.

[Hexadecimalism]

So I'm trying to create my power dashboard and I can find all the items in blue (not included in blue is the battery charge level which I can also find).

All that works well enough for the display below

However, I'm working on a custom dashboard and I cannot seem to find the rates at each the panels are generating, power is being consumed, battery is being charged/discharged and the current load for the house. I don't want to "collect" that data, just display (akin to how the soliscloud website does it) it even if it will always be a few minutes or seconds out of date. Is there a way that it can be obtained by combining and or converting values in other solis sensors into a virtual sensor?