<p>A simple, low-cost solar water purifier (SWP) for rural households, which does not require electricity or waste precious water has been developed. The SWP consists of four tubular solar water heaters
Solar Water Heaters
<p>The country-wide Market Assessment Study of Solar Water Heaters carried out in 2009 under the UNDP/GEF Project identified high potential States and Regions. This study focuses on five states/regions which are likely to contribute 49% of the SWH realizable potential up to 2022. These are: Maharashtra, Gujarat, <br /> Tamil Nadu, Andhra Pradesh, National Capital Region (NCR).