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The world is lagging behind to achieve the Sustainable Development Goal 7 of the United Nations, i.e. ensuring access to affordable, reliable, sustainable and modern energy for all by 2030. More than 675 million people are still lacking access to electricity, mainly in Sub-Saharan Africa despite the availability of abundant solar resources. Current traditional electrification methods, whether they are based on national grid extension or the distribution of Solar Home System, are struggling to cope with the pace of population growth in Sub- Saharan African countries. Thus, there is room for innovative rural electrification models. Nanoé, a French-Malagasy social company, proposes a Lateral Electrification model based on the progressive building of decentralized and decarbonized electrical infrastructures in a bottom-up manner, with the help of local entrepreneurship. This paper presents this rural electrification model with its associated technological innovations as well as the field deployment of 4 DC micro-grids with decentralized production and storage, named mesh-grids.