Jorrit So let's say take a max charge/discharge rate of 6kWh for your battery.
If WW calculates the percentage charge rate on that basis, and you needed 6kWh (to top up the battery) for a two-hour window, we would calculate 50%.
However, if we send 50% to your inverter, we would get 5kWh rate which would also finish way before the end of the two hour window.
In order to get the correct adjustment, we need to allow you to specify the max charge/discharge of battery.
And also allow for an adjustment fraction/ratio if the inverter has a higher charge/discharge rate.
This would mean, you specify charge rate of battery to be 6kWh. And add an battery/inverter ratio in of 6/10 or 0.6.
We then take that and multiply that by our originally calculated percentage of 50%, which is 50% * 0.6 = 30%.
And 30% of 10kWh rate of the inverter would indeed result in 3kWh rate being set on the inverter, and meaning our 6kWh would be charged over 2 hours.
Sounds a bit complicated, but does that make sense? Alternatively we add a separate inverter charge/discharge rate, and sort the ratio out in the background. Either way, it requires input that will be initially defaulted.
This would clearly go in the Advanced settings with sensible defaults. And most people would not need to touch it.
Can you confirm that if you set the charge rate of your inverter to 50%, your battery charges at 5kWh, not 3kWh?