Wärtsilä Energy Storage and GEMS Power Fekola Mine in Hybrid Project

Wärtsilä Energy Storage and GEMS Power Fekola Mine in Hybrid Project 

Fekola, Mali

17.3 MW / 15.4 MWh

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. Wärtsilä has partnered with B2Gold to deliver the solution. Wärtsilä’s GEMS, an advanced energy management software platform, will integrate, control and optimise a 17.3 MW / 15.4 MWh energy storage system alongside a 30 MW solar photovoltaic plant onsite, in addition to the mine’s existing 64 MW fuel generator.

Hybrid solutions with renewable energy-sourced power operations, are a realistic and effective means for increasing energy reliability and lowering operating costs for the mining sector. These remote locations are ideally suited for hybrid systems. Our extensive experience with microgrids in various climatic and geographical conditions will help the Fekola mine, and others of its kind, to achieve their sustainability and cost saving goals.
Risto Paldanius, Business Development and Proposals Director, Energy Storage & Optimisation, Wärtsilä Energy Business
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
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
Reduced carbon emissions, fuel consumption and mining operational costs
Improved power reliability via storage energy generation capabilities
Short payback period ensuring the lowest LCOE

Main data

Site Size
17.3 MW / 15.4 MWh
Site Location
Mali, Africa
Microgrid control
Scope of Services
EEQ with installation supervision

Fekola, Africa2

The project will hybridise the energy supply of Fekola to reduce the facility’s dependence on imported heavy fuel oil, saving operational and transportation costs, as well as lower greenhouse gas emissions.

The application of the project is to maintain microgrid stability, in addition to the curtailment of ramp events, the elimination of engine and solar power fluctuations and the provision of spinning reserves. GEMS will use automated and forecasted data, including load demand and weather, to enable energy production optimisation, ensuring the lowest Levelised Cost Of Electricity (LCOE) for the mine.

The renewables plus storage solution is both cost competitive as well as environmentally beneficial. Payback on the project is expected in only a few years and carbon emissions are projected to reduce by approximately 86 million pounds per year. 

Webinar Mali
Webinar recording
– A Hybrid PV, Storage, Thermal-powered Gold Mine

Downloads & links

Fekola Mine Case Study 

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