Moved to the Adirondack Mountains and lived off the grid for 2.5 years in the old place while building the passive solar home with a house-sized array and battery bank. We kept two of these chained in the attic, connected to two 100W panels, and they powered our laptops, washing machine, vacuum cleaner, headlamps, "Lighthouse" lamps rechargeable batteries, cell phones, etc. Around winter solstice we sometimes had to top off the power with a generator, but overall these did the trick beautifully. We're keeping them connected to the new home as a backup power source, just in case. I just recommended one of these to a friend whose sister lives in Puerto Rico and has been without power since Irma washed through.
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