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Battery powered outdoor water dish heater Answered

I have 3 dogs who are kept outside at our Pennsylvania home.  None of the shelters are near an electric source. With winter freezing temperatures on the way, is there a way to keep their water dishes from freezing, especially overnight?   Is there a way I can use one of the electric dog dish heaters to run, say on a battery without it costing an arm and a leg (I have 3 dogs!!)??  I'd buy the dishes at a pet supply place (see site below) for about $30, but running electricity to their kennels is not possible.  Any advice?

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MissouriVillian (author)2011-11-20

I believe this panel will run 2 of the bowls you linked to. There is tons of help on here for building them too.   https://www.instructables.com/id/Homemade-63-Watt-Solar-Panel/

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