The copper ones? Only if you like the art or have time to kill. I wouldn't have a still smaller than 3-4gal. Average abv from the fermentate is 15%, if you are good and have the right yeast you can bump it up to 18%. You never ever fill a still completely; 3/4 of capacity max as the mash foams and bubbles, if that gets into column the run is fucked. You can never get better than 95% EtOH out of the still, most homestills can get 92%. Say you have a gallon of fermented mash with abv 15%: 128oz X .15=19.2oz theoretical EtOH, but physically impossible to obtain 100%, so realistically say 90%=17.28 oz of 90% (180 proof) EtOH as a yield, basically a little more than a pint of finished product and cut that with water to 45%(90 proof) drinkable stuff and you end up with about a quart. That quart was the result of a weeks time in fermenting and about 4-6 hrs of distilling.
Not impressed with solar stills