I do actually have 3KW solar array which, even with the S3 running 24/7, still manages to fully charge my battery bank daily when the sun is shining which is most days here in the Algarve. So, I am not paying the electric company as such but just recovering some of the initial solar investment I made 3 years ago plus I might end up with a bitcoin or two by the time the difficulty doubles again I believe middle of next year. I turn the unit off on cloudy days to divert max energy to battery charging. Once the warmer weather returns in March I will put the S3 back in my workshop don't need the added heat in my room then.