Less than 17% of the Cameroon rural population has access to electricity. For the government to achieve its objective of rural electrification, the production, transmission, distribution and supply of power needs to bring onboard private small scale producers who can produce and sell the energy to the national grid at least at production cost. This will gradually lead to a smart grid system. At the moment, Cameroon is facing an extreme energy shortage and it has put many remote areas into darkness. The present demand for energy has gone far above the production capacity  Like in metropolitan areas, new settlement areas are coming up every day and due to the many bottlenecks to get domestic grid subscription, and some people fall into illegal connections  (“branchements anarchiques”) and falsifying the subscribers’ inventory of the national grid line. Many step down transformers are overloaded giving way to voltage fluctuations.

Cameroon has a unique position within the CEMAC region, an Economic Commission of Central African states, whose principal objective is regional integration for economic growth. Cameroon is also the third country in Africa with the highest hydro potential (after the DRC and Ethiopia) with approximately 23,000 megawatts of exploitable hydro power. At present Cameroon has exploited just approximately 3%. For Cameroon to take an economic advantage of this position, there is a need to strengthen its energy sector to power its industries which inevitably is the locomotive of development.
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We are glad to have HPNET Member Mr. Atud Jonathan Asaah from Cameroon, as a guest blogger to share his views on the potential and impact of hydro mini-grids in his country.

Africa harbors one of the world’s best renewable energy resources which can be used to harness electricity. Unfortunately, in 2012 the International Energy Agency announced that about 590 million people in Africa live without access to electricity. Meanwhile, a similar report in the same year quoted that there were 1.5 billion people around the world that don’t have access to electricity.

From the two reports cited above, it can be seen that Africa alone had approximately 40% of those living in darkness in the world. Even though this report is 7 years old, there may be little change as regards the proportion of Africans living in the dark today because in most of these African countries, the grid extension program has been very slow. ​

This low rate of rural electrification (17%)is due to a series of factors:

• Cameroon has a population of above 24 million people and 45% of these people live in rural areas. These rural areas are organized in small villages mostly located in geographically difficult topography that makes it very expensive for grid extension in terms of distribution infrastructures. In most cases, the terminus of the grid line maybe too far from the village.
• The initial demand in most of these villages is usually very small and the national grid company may find it not cost effective.

On the other hand, these villages are naturally endowed with unlimited renewable energy resources on the spot which include abundant rivers, streams, wind and the sun that could constitute reliable sources of electricity for these remote communities. Law N ° 2011/022 of 14 December 2011 of Cameroon governing the electricity sector in its Article 29 provides for conditions to own private power production units but there is still a very timid entry of private investors in the energy sector, which therefore calls for more awareness from government to lure these partners into synergy to meet up with the demand.
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Cameroon is found within CEMAC-The Economic community of Central African states and the most populated country and acting as the economic hub of this block. Its energy sector remains a major prerequisite to meet up its economic giant position within this economic block which is considered a regional integration used as a tool for economic growth. The government cannot achieve this energy objective alone via its current  grid extension program.

WAY FORWARD

Most of the villages of these rural areas have been naturally endowed with renewable energy resources like the sun, wind and small streams which can be used to harness their energy on the spot.  The more stakeholders fold their arms and see this poor population continue to live in the dark, the more villagers rely heavily on biomass -- cutting down trees in the forest to collect wood and produce charcoal for cooking and heating, kerosene lamps used to provide lighting, petrol and diesel will be used to power standby generators.

We cannot sit and watch these practices when at the same time we intend to mitigate the green gas effect which is causing global warming (climate change mitigation). Renewable energy using indigenous resources like those listed above can play a catalyst role in this energy revolution. Reference is made  here to small-scale hydroelectricity systems, solar systems, and wind power. This will lead to bringing the sources of energy back to the community level- a participatory approach to energy generation which gives local communities greater autonomy over the infrastructure.

Many of the people who lack access to electricity in Cameroon live in these villages with sufficient sunshine, abundant streams and rivers that flow throughout the year and in most cases have hills that provide the necessary gravity to rotate a micro hydro turbine.

Creation of community micro hydro power stations

These are micro power stations that have maximum capacity of up to 100 kW and are easily managed by the community. Those communities, which are isolated or found far off the national grid, can be powered by these independent power units which involve harnessing small water sources usually in hills that are flowing under the natural influence of gravity with minimum civil construction infrastructure. The water is tunneled through a pipeline (penstock) to rotate a turbine connected to a generator to produce electricity. The penstock builds up pressure from the water that has traveled downwards from a hill. The electricity is then sent to the village community for household consumption or sold to the national grid. The construction of a community micro hydro project requires community mobilization especially at the civil phase. The local community needs to be well aware on the importance of the scheme​.

Community battery charging units

These are small hydro power plants of few watts up to 5 kW which can be used to charge DC batteries at the community level. These batteries are later used with inverters to obtain AC current which is used to power domestic appliances.

Community-based micro hydro repair workshops

The main difficulty encountered in most cases in running micro hydro systems is the lack of a ready supply of affordable turbine parts and the lack of domestic manufacturing capacity.  The presence of local technical workshops that can fabricate simple components needed to run the system is vital for the sustainability of the project. Most of the remote micro hydro systems in Africa have been closed down because of lack of spare parts for its components.  Lack of local fabrication workshops poses a great challenge for rural electrification.​

​Africa is losing more forest than any continent and making it more vulnerable to climate change. This seems to be the right moment for policy makers to intervene via promotion of these community-base micro hydro schemes -- which will not only protect our forests but equally improve on the livelihood of these rural population.​