You’ll probably find that DemandPercentage drops to 30% whenever it’s heating water. Compare it against WaterPump4Status.
The other value it drops to (70%? mine goes to 90%) doesn’t seem to correlate to anything useful.
It’ll be difficult to provide a sensible default multiplier to convert HeatPumpFrequency into approximate consumption, as it needs to be specific to whichever heat pump the user has installed. I’d suggest keeping it as a simple percentage, maybe documenting how to estimate consumption from it.
The ‘wrench’ icon has never worked for me either.