The ramp = your own ceiling
Slashes climb to the right. The tallest, far-right slash is 3.3 kW — the most this small rig makes on a clear-sky hour. Not a generic 6 kW number; this is your 100%.
The owner's own design: a ramp of little slashes that grow taller left to right, far-right is the rig's clear-sky peak (3.3 kW = 100%). My take — everything left of now is lit, and a single bright needle marks exactly where this hour landed on the way up, with the live 1.8 kW pinned to it. Read by height and lit extent first; gold only reinforces (colorblind-safe).
Slashes climb to the right. The tallest, far-right slash is 3.3 kW — the most this small rig makes on a clear-sky hour. Not a generic 6 kW number; this is your 100%.
Every slash left of the needle is filled gold. The lit width is the reading — you can feel "55% of the way up" without reading a single digit.
A small open caret on the ramp marks what this hour usually brings. Above it = a good hour; below = the sky is holding you back. Pure shape, no color needed.