Set power controller + heating rod

Hi guys,

i have a power controller for a heating rod.
I can control the power controller through PWM with a slider from 0-100%.

I additionally get the excess current from the Inverter.

In case of surplus, I would like the power controller to be set accordingly.

How can i automate this easily and can change the values easily later?

30% = 45 Watt
40% = 234 W
50% = 583 W
60% = 1083 W
70% = 1506 W
80% = 1884 W
90% = 2279 W
95% = 2458 W
100% = 2688 W

Thanks a lot