Fill with glasses and plug into your home before travel. It takes about 4 hours to get it up to 41F. Run overnight on a deep cycle battery charged by a 200w solar panel and even with 4 hours of sunshine overnight in the height of summer the battery will hardly drain. Perfect for my family home. I am very impressed with this device. Highly recommended. Putting a blanket underneath to add insulation works even better. Of course, don't block the vents. Would buy it again with great pleasure.
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