Water is critical and inevitable for all forms of life, which is available in copious but not suitable for direct ingestion. Also, the existing technologies are costly, bungling, and energy inefficient. They trip on fossils fuel which is infecting. The technology we are considering here exploits direct solar energy for water desalination. This greener technology further concentrates on the latent heat storage through phase change materials (PCMs). The PCMs are profusely available at reasonable rates. The technology transition will reduce the carbon footprint safeguarding the energy security and environmental sustainability.