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Off-grid sustainable sanitation

Waterless flush toilets and sanitation solutions for everyone, everywhere

May 2020
Gallery Off-grid sustainable sanitation 1
Gallery Off-grid sustainable sanitation 1


Loowatt has developed a waterless flush toilet and sanitation solution that elegantly addresses one of today’s toughest challenges: to create clean living environments in a world where people are many, and water is increasingly scarce.

This patented toilet-and-refill system offers the marvel of a flush toilet without the water, hygienically and odourlessly capturing waste for value-generating treatment. Loowatt systems facilitate the safe capture, containment and transport of waste to treatment centres. This versatile plug-and-play processing equipment offers utilities a source of feedstock for diverse waste-to-value systems including anaerobic digestion (waste-to-energy) and nutrient recovery. Loowatt services in the UK and Madagascar have provided a great toilet experience to over 250,000 customers and processed more than 300 tons of waste in utility-run facilities that generate energy and fertiliser.

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Label Date May 20, 2020
From United Kingdom
Maturity stage Medium and large scale commercialization

The environmental benefits

  • Carbon footprint per average Loowatt flush is estimated to be 4 gCO2e compared to an average of 7gCO2e per water-flush
  • Captures waste for value-generating treatment, providing a valuable feedstock for anaerobic digestion that captures methane emissions for conversion to power

The Financial benefits

  • Payback time reached under 1 year
  • Can increase gross margin on services by 10-30% compared to conventional toilets

Activity Region

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  • Headquarters
  • Activity

Company Profile

Loowatt Ltd

Loowatt Ltd. has developed a proprietary waterless and energy-generating toilet system that is clean and odourless.

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Headquarters Brixton Hill, Tulse Hill, London SW2 1JE, UK

Networking Partner


Waterpreneurs is a global “for-impact organisation”, supporting the scaling-up of impact investments financing the growth of WASH enterprises operating in developing countries, and respecting human rights. Waterpreneurs brings extensive knowledge of the water and sanitation entrepreneurial sector, impact investing and facilitation of marketplaces.

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Solutions Associated 30
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The information set out above, is solely for the purposes of information and the Solar Impulse Foundation does not provide any guarantee as to its authenticity, completeness or accuracy. This information does not constitute investment advice or a recommendation to buy into, transact or to enter into any agreement with any of the parties or persons mentioned above. Potential investors or interested parties are solely responsible for their investment or business decisions and for performing any due diligence required by the circumstances. The innovator Loowatt Ltd has asserted ownership of the intellectual property rights for images, videos, and content showcased above, affirming full and unrestricted usage rights, and has provided explicit permission for the Solar Impulse Foundation to publish such information designated as "public" in the application form.