Charge limit

BMW iX1 xDrive30, free 3-hour window

Charge % (at start, or now if already charging) Time of that % (24 h)

Settings

Free window start
Free window end
Free cap (kWh/day)
Other household use in window (kWh)
Charger power (kW)
Usable battery (kWh)
Wall-to-battery efficiency (%)
Power starts dropping at (%)
Power at 100% (% of full)

Taper is a straight-line drop from the "starts dropping" point to the "at 100%" level. Rough guess; adjust once you've seen it happen. Settings are remembered on this device only.