Most residential water heaters in the US are electric. Now a solar hot water service in Florida helps to promote solar water heaters. What is interesting about the service is that a local power company is involved.
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/new-model-pushing-solar-hot-water
[2] http://admin.indiaenvironmentportal.org.in/category/author/stefan-trojek
[3] http://admin.indiaenvironmentportal.org.in/category/journal/sun-and-wind-energy
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/solar-water-heaters
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/solar-energy
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/united-states-america-us
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/power-industry