With the Raritan
smart flush control I believe it’s called, the amount of water used is programmable.
My gut says there is no water saved in an electric head
though, for us we fill a 35 gl tank in I believe 5 days.
I believe Peggie had posted that a couple will use about 7 gls of a holding tank
per day. Until she posted that I had always though that we were water wasters as others seem to act as though their tank lasts weeks.
However I believe you can cut down too much on water and that will cause you problems with stinking hoses etc, and maybe plugged hoses too.
We use the reduced mode for liquid and the normal for solids.
The difference is the reduced mode is one flush, the normal is three flushes.