Solarsack uses UV rays from the sun to disinfect contaminated water for use as drinking water. The water is held in a flat container that can be placed in the sun. Greater sales lead to greater impacts not only on public health, but also the environment, given the reduced CO2 emissions from boiling water.

The project’s aim is to improve the performance of the Solarsack by adding a photocatalytic solution to the product. This would result in shorter disinfection times, as well as reduced reliance on full sunlight and the potential to chemically clean water. If the Solarsack can clean water in cloudy weather, its usefulness will increase significantly, thereby increasing its market penetration.

Solution idea

Determining the correct photocatalyst and investigating its effects on the disinfection process and chemical purification. There are also safety aspects concerning the use of photocatalysts with the Solarsack. The project will investigate these.

Project deliverables

At the project’s conclusion, we will demonstrate a system prototype in a TRL7-equivalent operating environment. Subsequently, Solarsack will operationalise and commercialise the developed solution. Today, Solarsack has the potential to reach hundreds of millions of people, improving their health while reducing their carbon footprints.

Problem owners

Problem solvers

This project is financed by Energy Cluster Denmark’s Technology, Innovation, Environment, and Energy (TIME, from the Danish initials) support programme. It offers three years of support to allow small- and medium-sized businesses to collaboratively develop innovative electronic products focused on energy optimisation. The TIME project is supported by the European Regional Development Fund.

Project timeline

PHASE 1: Conceptualisation
PHASE 2: Development and testing
PHASE 3: Demonstration and validation
PHASE 4: Commercialisation

Financed by


Start: February 2020
End: August 2021
Grant: DKK 1.428.000

Contact person

Peter Munch Kofoed

Peter Munch Kofoed
Project Manager
Tlf: +45 3153 2597