Sahel states push a high-voltage backbone as security and blackouts pull in opposite directions

DAKAR — In the Sahel, electricity is a security story as much as an engineering one. When a feeder fails in a garrison town, the political cost lands faster than a tariff petition. That is the backdrop to a multinational push for a high-voltage interconnection often described as the Sahel’s electrical “backbone.”

African Development Bank project documents and related procurement notices describe a Sahel High-Voltage Backbone interconnection linking Burkina Faso, Mali, Mauritania, Niger and Chad. The work sits alongside broader West African regional energy programmes, including strands of the Desert to Power initiative tracked by WAPP and development partners. AB24 is careful here: this is a project pipeline and feasibility corridor, not a ratified single Sahel electricity treaty, and not a claim that five national grids already operate as one.

What the backbone is trying to solve

National utilities across the corridor still rely on a mix of thermal plants, limited hydro where geography allows, and growing interest in solar parks that need evacuation lines. Interconnection promises mutual support during outages, better use of surplus generation, and a path to wheel power toward load centres that diesel cannot economically serve. AfDB progress reporting in the mid-2020s has pointed to preliminary corridor identification and solar-park siting work, while flagging familiar risks: security constraints on field surveys, data gaps, and the slow grind of cross-border technical harmonisation.

Procurement notices for external audits of project accounts for financial years 2025 and 2026 are themselves a signal — money is moving far enough to require multi-year audit scopes, even as towers and conductors remain years from some segments.

Security is not a footnote

Any transmission map through the central Sahel runs near contested roads and thinly held districts. AB24 will not invent casualty figures or attribute attacks without named sources. The reporting point is structural: contractors price risk into timelines; governments struggle to guarantee survey teams; and communities living under irregular supply have little patience for regional masterplans that do not restore evening light.

That tension is why Dakar and other coastal capitals watch Sahel power politics closely. Coastal states already host WAPP market conversations; landlocked neighbours need both electrons and the political bargains that keep interconnectors financed when security budgets compete with energy budgets.

Desert to Power and the solar overlay

Regional energy programmes branded under Desert to Power have sought to pair Sahel solar potential with transmission and institutional reform. External-audit tenders for West Africa Regional Energy Program Phase 1 accounts covering 2025–26 underline that these are living portfolios, not press-release vapour. Still, readers should separate programme branding from energised megawatts. A solar park announcement without an evacuation line is a spreadsheet, not a grid.

ERERA and WAPP forums through 2025 have kept returning to the unglamorous themes that decide whether interconnectors work: market rules, wheeling charges, dispute settlement, and operational coordination among dispatch centres that do not share a language or a SCADA culture overnight.

How AB24 will cover the next milestones

Watch for published feasibility completions, financing closes, and construction notices that name specific line segments — not for sweeping claims that “the Sahel grid is stabilised.” Stabilisation, if it comes, will be measured in frequency excursions avoided and towns that keep pumps and clinics online during a neighbour’s generation shortfall.

From Dakar, the story is patience with a hard edge. The backbone is real as a development project. It is not yet a continental switch the region can flip.

Sources: AfDB project and procurement notices on the Sahel High-Voltage Backbone interconnection; WAPP / Desert to Power programme audit tenders for 2025–26; ERERA forum materials. No single Sahel-wide grid treaty is asserted.

— AB24 · Dakar