Having welding, machining, and ceramic equipment, our power bill was getting
out of hand. ( than $200/mo) We recently installed 30- 230w solar panels
and now have watched our power meter go backwards at rates up to 6sec/rev.
In just a few days our panels generated more than 200kwh and one of those
days had cloud cover. Oh and we used the solar installation to also create
a car port. It may take a few years to recover the cost, but just watching
that meter go backwards was worth quite a bit.