Energy Storage in Mali
B2Gold + Wärtsilä

Reference case

Renewables plus energy storage become cost-competitive at an off-grid mine in Mali

B2Gold, a Canadian public gold-mining company, operates a large gold mine in southwest Mali, Africa.

Seeking a clean energy solution to improve energy generation and energy security at the off-grid mine, including integration of existing energy assets (solar and engines), B2Gold chose a hybrid solution to reduce their fuel-dependence, cut carbon emissions and optimise mining operations at the Fekola Mine.

What15.4MWh Energy storage and GEMS software
HowEEQ with installation supervision

This is what we achieved


Optimised Energy Storage using GEMS Energy Management Software

3900 Tonnes

Reduction in Carbon Emissions per year

GEMS is basically the quarter-back of the team

Dennis Stansbury, Senior Vice-President of B2Gold

How we did it

Challenge icon


  • Optimise energy production at a fuel-dependent, energy-intensive operational mining facility in southwest Africa
  • Ensure grid stability and provide energy security to a remote mine where energy from the local grid is unavailable and/or unreliable
  • Integrate and optimise multiple renewable assets under a single portfolio
Solution icon


  • Complete asset optimisation via GEMS automated and forecasted data to enable energy production security and efficiency
  • An integrated hybrid energy solution, incorporating an energy storage system, an existing solar array, an existing power generator, and industry-leading energy management controls
  • Sustainable clean energy addition to the mine
Benefit icon


  • Reduced carbon emissions, fuel consumption and mining operational costs
  • Improved power reliability via storage energy generation capabilities
  • Short payback period ensuring the lowest LCOE

The main details

Site Size17.3 MW / 15.4 MWh
Site LocationMali, Africa
ApplicationMicrogrid control
Scope of ServicesEEQ with installation supervision
Mali Map

Energy Transition Talks with Sushil Purohit

In this video, Sushil Purohit, President of Wärtsilä Energy, speaks to Dennis Stansbury, Senior Vice-President at B2Gold, about how their Fekola Gold Mine, in Mali, West Africa reduced their dependency on expensive fuel, lowered their carbon emissions and optimised their mining operations by using our energy storage and GEMS Digital Energy Platform.

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Related materials

Energy Storage: Enabling large-scale dispatchable renewable energy on South Africa’s grid (ATA Webinar)

Southern Africa: The Land of Renewables & Storage Opportunities (ATA Webinar)

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