smartphone, giving the device "smart" capabilities. This means that customers can connect their smartphones with the ACE One. Customers can use the pre-installed ACE Connect app on their phones in order to track their loan repayments and contact ACE customer services directly. ACE are using the ACE One's smart functionality to implement a flexible 'pay-as-you-save' model as the unit can now be remotely switched off if the customer stops paying for it. The Colorado State University has certified the ACE One as an IWA-ISO Tier 3 for emissions and efficiency, and 4 for safety in laboratory tests. The product has been field tested in Cambodia by the Berkeley Air Monitoring Group, who estimate that every 25,000 units in use will avert as many as 40 early deaths, and avert 1,295 Disability-adjusted life years (aDALYs). Key features Fuel Savings: Through efficient combustion, the ACE One can reduce fuel use by up to 70% compared to an open fire. In Cambodia, researchers found that the product reduces fuel use by 52% compared to traditional Khmer stoves. By using the ACE One, customers can cut their basic energy expenses by up to 80%. Reduced Emissions: The ACE One burns biomass fuels without smoke, reducing CO and PM 2.5 emissions by as much as 95% compared to an open fire. Solar Electricity: The ACE One has an integrated USB port which can be used for charging mobile devices. The product also includes an LED lamp attachment. The business model African Clean Energy is a for-profit company. It is currently active in Lesotho, Cambodia and Uganda, and its flagship factory is located in Lesotho. The ACE One is sold direct to consumers in these countries using an instalment-based payment model at a cost of about $100 each. This ensures that the product is affordable to people who would be unable to afford a large lump sum payment. To date, the company has sold about 60,000 units. The company has a potential market of approximately 900 million households. ACE is currently expanding its mobile retail shops to give more people access to its products and services, in a project which is being co-funded by the European Union. References Social enterprises Companies based in Amsterdam B Lab-certified corporations