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There are very many advantages that come with solar and wind energy water heaters. The first advantage of the wind and solar water warmers is that they are cheaper to install than the electric heaters. When installing them what you need is the solar receiver to be installed on the roof where water runs in pipe through it, or installing a windmill outside your house. In many places the costs of the above is very small compared to the electric one where you have first to install the electric and then the boilers.