The ACE 1

The ACE 1 Energy System is an integral energy solution for Bottom-of-Pyramid households. The device symbiotically pairs thermal and electrical generation to provide a clean, smokeless cooking experience, while also giving users access to electricity for charging and lighting. This enables the energy system to have the positive impact of an improved cookstove, with the essential electrical functions of a solar home system.

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The ACE 1


The ACE 1 is a solar-biomass hybrid that uses one LiFePO4 battery to power a ventilator creating clean biomass combustion, as well as to give users access to solar electricity for mobile charging and lighting.

In 2019 we upgraded the ACE 1 to have ‘smart’ capabilities. The new product may come with a smartphone with our proprietary Android ACE app pre-installed on it. This innovative pairing unlocks new, exciting features:

Pay-As-You-Save (PAYS) model

The new ACE 1 can be remotely switched on/off. This means customers can make flexible, incremental repayments to activate the system's functions for an equivalent period of time, until the full amount of the investment is paid off. Our data shows that energy cost savings are so significant (83%), they can be used cover the value of the monthly instalment, making the ACE 1 available to any household, regardless of income.

Quantification of social and environmental impact

Once customers connect their smartphones to the ACE 1, it communicates back to our database with unit activity data. This allows us to better quantify the impact of the ACE 1, and creates unprecedented transparency into the energy consumption habits of off-grid households, on whom little data is currently available. It is important to note that we maintain the highest levels of security and privacy in our system to protect user data.

Improved customer service delivery

The ACE app makes it possible to gain a direct channel of communication with customers. We can get notified about product malfunctions in real time, even before customers get in touch with our representatives. This allows us to extend timely, high-quality maintenance services and maintain close communication with customers all throughout the process. We can also update our customers about new products and services that fit their energy needs.

Technological Specifications


33 x 33 x 35cm

Fuel Consumption

Full fan: 750 g (8mm pellet) in 50 minutes, and Low fan: 750 g (8mm pellets) in 100 minutes




LiFePO4 6.4 V / 5 Ah


Solid biomass. Wood pellets are recommended.

Life Expectancy

8-12 years


LED lamp attachment (100 lumens) and Solar panel (10V/10W unregulated)

Laboratory Testing

Laboratory Testing

The ACE 1 has been laboratory tested by Colorado State University (2014) and Covair (2016). In these tests the ACE 1 consistently achieved IWA-ISO tier 3- 4 standards on emissions and efficiency, and received a ‘best’ rating for safety with a score of 97 out of 100. This means that the ACE 1 has the cleanest, safest and most efficient multi-fuel cooking capability in the market.

Field Testing

Field Testing

The ACE 1 has also been tested extensively under real world conditions. In a field test conducted by Berkeley Air Monitoring Group the ACE 1 reduced woodfuel used by at least 52% compared to traditional stoves in Cambodia, and it is estimated that every 25,000 stoves distributed averts 40 deaths and adds 1,295 years of healthy life (aDALYs) from reduced cooksmoke exposure. In a longitudinal study conducted by Liverpool School of Tropical Medicine in Malawi, the ACE 1 reduced the incidence of cooking-related burns among children by 40%.

Value for Money

Value for Money

The independent British think tank Chatham House has conducted an industry-wide analysis of commercially available cookstoves comparing various models in terms of annualised costs. This study rated stoves based on their costs over time: the upfront cost of the stove divided over its lifespan, as well as the cost of the fuel needed to run it over that time. The ACE 1 is considered the most cost-effective advanced cookstove, and is even price competitive with much cheaper improved cookstoves due to its long lifespan and high efficiency.


We are committed to maximising the benefits we offer to the local communities we operate in. A big part of this is local manufacturing.


Made in Africa

We are proud to say that the ACE 1 is made in Africa, for Africans, and we want to continue down this path by developing new facilities in the other markets in which we operate.



Our flagship factory is based in Maseru, Lesotho. We employ 35 staff on the production line, and an additional 30 in admin and sales roles. With this format, the plant's current capacity is 3000 ACE 1 units per month.



We maintain a 50% gender split in all our operations, and 20% of factory positions are filled by individuals with disabilities.

Copyright @ 2019 African Clean Energy