The Screen of Lifts is incredibly energy consuming, even more so than the occasional use of the lift itself. In the config file there's no option to set the power efficiency of the screen either.

I thought it was a bug and came on to report the same issue, since my generators (extra generators) were completely running out of fuel and the lift is not being used, so the lifts themselves are full of energy. The screen is draining power at a rate that the generators are not storing any power and they are producing 32/tick.

EDIT - not sure what it is set at, but the power consumption for the screens should be minimal, maybe a unit or two every 20 ticks, but not 32/tick, or whatever it is set at now.

EDIT2 - there definitely was some weird bug, because I went into a creative world and the power consumption changed. Went back into the regular world and the generator was then able to catch up to the screen power draw, but it is still using a lot of power. If I were to guess by looking at the generator power bar numbers, it is somewhere around 5E per tick, which is probably 20x too high.