Technology and the sun connect and make clean water for the world Solvatten is a combined portable water treatment and water heater system that has been designed for off-grid households use in the developing world. It is an easy, innovative solution that gives access to clean, hot water to impoverished people throughout the world. Thanks to its durable design it is also the cheapest method to obtain clean, hot water. Millions of primarily women and children need to walk dozens of miles every day to fetch water. Reducing the daily use of firewood and having a water source closer to home makes their lives so much easier. The unit has an average lifespan of 7-10 years, meaning it withstands those early years in which children are at their most susceptible to waterborne diseases.