Do you live in a high end hotel hallway? Jk, couldnt help myself.
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Ohms law at work.
P=V*I is the same as P=V²/R
The bed resistance is the same, so doubling the voltage quadruples the power usage of the heat bed.
Oh, yes!
I have both 110V and 220V circuits in my shop. Starting with the X1C bed and chamber at 28°C, I set the bed to 90 °C and measured time to temp with a stopwatch.
110V required 6 minutes and 6 seconds. After cooling down, 220V took about 53 seconds, maybe a second or two less because I looked away and stopped the timer a tad late. The temperature was changing quickly.
Bambu restricted the X1C bed temperature because they found voltage leakage causing a shock hazard at the higher temperature when using 220V. I guess that was easier than providing better electrical insulation.
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