Rules power, help

Good morning.
I cannot, after having had problems with Flukso but now solved, apply the rules for solar production and consumption.
The rules have always been these: “if(power < 74) power = 0; else if(power >= 74) power -= 74; power *= 0.98” but now it no longer brings me zero power.

Is this for the flukso script?

please post here if so