Is a bit of a power hog, 750 watts. I use this on my solar set-up during sunny days.I have a CPAP and if I use anything but distilled water it get really nasty really quick, very unhealthy.With the shortage of distilled water I bought this... works perfect, clean water, no issues at all.Made about 7 gallons so far, takes about 1 hour per quart.With the charcoal filters (order extra) you can make almost any water drinkable, even salt water..If getting this for SHTF, make sure you can power it...