I've been tracking the savings and they are significant compared to the money I was spending on plastic gallons of distilled water from the various vendors close in to my location.
The price has run from about 87 cents to about a buck ten in the immediate area with some running as high as a buck twenty or so closer to work.
If you do the math that resolves to an average of a dollar and five cents per on average with a weekly consumption of five to eight or so gallons with frequent increases into the to 10 gallon per week in the summer months when I am more thirsty and other times depending on what I have going on at the moment. I had been buying 8 to 10 bottles a week and cannot really account for where they all went. Tea, work refreshment, and various other uses played into the picture.
1.05 x 10 = 10.50 a week frequently
1.05 x 08 = 08.40 a week often
So now my needs are met with a daily distilled gallon produced intermittently in my home. I was shocked at the "cigarette ash" appearing residue at the bottom of the vessel and I maintain the cleanliness with distilled vinegar which I allow to sit for hours prior to hitting it with the old scotch brite scrubber.
It's all very quick and easy as I refill the vessel and five hours later transfer the distilled gallon of water to my storage tank.
I can't really comment on the electrical useage associated with the distiller but the fact that I no longer trudge from the store to the truck and from the truck to the house with those 8 to 10 gallon bottles of product each week has been a boon in and of itself.