Cambodia_ACE customer

Bringing Sustainable Energy to the Frontier

EDITOR’S NOTE: THIS PIECE IS AUTHORED BY Judith Walker, director of operations for African Clean Energy (ACE), manufacturing clean energy products including the ACE 1 Solar Biomass Cookstove. THIS PIECE IS PART OF A SERIES EXPLORING THE SUSTAINABLE DEVELOPMENT GOALS. SEE THE INTRODUCTION TO THE SERIES HERE.

When we in the West imagine the future of renewable energy, we are typically thinking of large utility-scale projects like offshore wind farms, vast solar arrays, or the “super-grid” infrastructure required to carry this energy to our cities. With energy use, per capita in OECD (Organization for Economic Cooperation and Development) countries reaching a peak of over 8,000kWh a year (World Bank, 2013 figure), these projects are certainly vital to ensuring the sustainability of energy-intensive Western lifestyles. However, the majority of people in the world are not living in high-income countries, and as such utility-scale renewable energy generation is unlikely to be the panacea that will provide “universal” energy access by 2030.

A KIVA loan group_stove demo

IN THIS PHOTO: A KIVA Loan Group conducting a ACE1 stove demonstration – PHOTO CREDIT: AFRICAN CLEAN ENERGY (ACE)

For example, what about the 13 percent of the world’s population who live in Least Developed Countries (LDCs), where the average per capita energy usage is just 191kWh a year? Multi-megawatt, multi-million-dollar, grid-extension projects are unlikely to be fully utilized, and the costs of building and maintaining plant and transmission lines place extra pressure on the already strained finances of LDCs. What about Sub-Saharan Africa? Where rapid economic growth over the past decade has led to consumer demand (eg: for mobile phones) outpacing electricity generation capacity. Ghana, Nigeria and Ethiopia, is where annual GDP growth has averaged seven to eight percent per year, over the past five years. The Economist, the decades-long timeline for bringing a power plant online, will likely be too little too late. The challenge posed by the United Nations SDG7 (Affordable and Clean Energy), is to “ensure universal access to affordable, reliable and modern energy services, by 2030.” Thus, does not just require the mobilization of resources to extend the grid across the globe; rather, it requires solutions tailored to a multitude of specific national, regional and local contexts. In order to determine the future of (renewable) energy in the developing world, it is vital to understand how energy is currently used.



In the developing world, most of the energy used by households is not generated by power plants, nor is it transmitted to homes by nationwide networks of overhead cable. This is because the vast majority of the developing world’s energy demand is for cooking energy, a demand which is overwhelmingly met by solid fuels, usually firewood or charcoal. Energy generation as it currently exists in the developing world is therefore highly decentralized, and largely takes place at the household level. The conventional wisdom in the development community, that people in the developing world are unwilling or unable to pay for energy services thus misses a key point: they already are. While the forms of energy delivered in this way are decidedly not modern (or in most cases sustainable) a household level model for providing energy is not inherently flawed, and in many cases distributed energy generation methods can provide much greater value for money than grid extension.

Cambodia_demoIN THIS PHOTO: ACE1 demonstration in Cambodia – PHOTO CREDIT: AFRICAN CLEAN ENERGY (ACE)

In recent years, solar-photovoltaic technologies have become more powerful and less expensive than ever before. Solar power is quickly becoming the renewable energy source par excellence. In the Sub-saharan African context, where firewood and charcoal expenses can take up 20 percent of a household’s income, the solar industry is booming: from pico-PV cells powering a single lantern, to powerful rooftop solar home systems capable of meeting an entire family’s energy needs. This is where the promise of SDG7 can be realized: by providing access to the means of energy generation at the household, business and/or village levels it is possible to extend electricity access far beyond the grid’s reach, and to do so in such a way that capacity can grow (or shrink) with demand. If the barrier of the initial capital investment in a solar product can be overcome (through microfinance, for example) then it is entirely plausible that even the poorest consumers in the developing world can achieve a level of energy independence. Furthermore, the modularity of solar systems means that solar is among the most scalable of currently available renewable energy technologies. This scalability allows us to think differently about how energy needs can be met.


There are a number of scenarios in which grid extension is not possible, nor desirable. However, there are efficient and cost effective ways, that these populations can be served through decentralized energy generation projects.

In high-growth regions of the developing world, there are emergent middle-classes who have increased demand for modern energy services. However, utilities designed for much lower levels of demand cannot immediately satisfy these new customers. This can severely stifle further growth, as it may take years for the utility to catch up with demand (i.e. By building new power plants). In this scenario, a “bridging” technology is required to meet immediate needs, while long-term energy generation capacity is still in the pipeline. Solar home systems present a good solution for households and small businesses in this scenario, as they allow for individual households to tailor energy generation to meet their current needs.

In isolated rural areas grid-extension can prove highly problematic. Long distances need to be traversed by high-voltage cable, and low demand for services in sparsely populated areas makes this sizeable investment unattractive. Again, there are decentralized alternatives. For larger rural population centers, solar mini or micro grids may be suitable for providing a village level solution for energy generation. In cases where the initial capital investment in a mini-grid is not feasible, pico-PV products are an alternative which allow for highly personalized energy delivery.

This is the space that African Clean Energy (ACE) operates in, providing energy solutions tailored to the needs and capacities of rural populations, where grid extension may never be feasible.

How_it_works_englishPHOTO CREDIT: African Clean Energy

ACE’s first proprietary product, the ACE1, provides smokeless biomass cooking as well as off-grid solar energy for lighting and phone charging. The ACE1 differentiates itself from the rest of the cookstove sector, by being the cleanest multi-fuel biomass cookstove available which is capable of using any solid biomass. Being able to efficiently burn anything from pellets and briquettes to cow-dung or agri-waste, the ACE1 provides contextually appropriate renewable energy technology for the most difficult to reach consumers. Through nine-month micro-finance loans we are able to make this high-tech, high-impact product accessible to BoP consumers, maximizing impacts on energy generation.

Impakter, SDG, African Clean Energy (ACE), AEC1 Model (Stove functions), Sustainable Energy Solutions, Judith WalkerPHOTO CREDIT: African Clean Energy

By focusing on the demands of the consumer, ACE are able to run a sustainable business, while also facilitating bottom-up participatory development.

In short, the goal of providing universal energy access by 2030 is achievable, but for the developing world it will require flexibility among development actors, and a commitment to providing contextually appropriate solutions. Large infrastructure projects will of course be key for many regions of the global South, but we must also recognize that these projects are unlikely to reach the most isolated communities in the developing world, and certainly will not do so by 2030. The excitement surrounding bleeding-edge renewable power projects should not distract development actors, from the less glamorous work of facilitating the democratization and decentralization of renewable energy production.



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