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Solutions to Clean Power to Remote Off-grid Mining Operations in Nigeria

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Tarik Sfendla Wartisla Off-grid Mining Operations in Nigeria

By Tarik Sfendla

The energy markets are undergoing a massive transformation as governments around the world transition away from fossil fuels towards the integration of renewable energy. This trend is clearly visible in the mining industry as demonstrated by recent power projects in South America and in Australia.

According to Bloomberg New Energy Finance, in 2018, mines purchased 1 GW of renewable energy generation assets; this amount tripled to reach approximately 3.5 GW in 2019, 90% of which consists of hybrid solutions.

Electricity demand for the mining industry is expected to increase significantly in the coming years as increased mine depth, harder rock and greater water desalination needs lead to higher energy intensity for the industry.

Whilst electrification of operations and vehicles is reducing certain emissions and generating cost savings, stakeholder targets to reduce emissions as part of the EESG (Environmental, Economic, Social & Governance) plans, is increasing the renewable share of the energy mix, which of course requires high flexibility in the generation to balance intermittent renewables.

In Africa, the mining sector faces inherent challenges, access to the power grid and grid reliability being the most significant. With most electricity supply coming from conventional power plants (coal, oil or gas), operators are challenged on the one hand with highly volatile operating expenses due to rising fuel costs, and by inefficient, unreliable power supply leading to costly production disruption and revenue losses on the other. Weak infrastructure and water availability compound the challenges for mines, particularly in remote, off-grid locations.

The combination of these trends and particularities of the African markets are setting the scene for the integration of renewables for the mining sector. A recent study by McKinsey showed that moving to renewable electricity sources is becoming increasingly feasible, even in off-grid environments, as the cost of electricity storage is set to decline by 50% from 2017 to 2030. This is especially good news for Africa where the cost of solar energy generation could be among the lowest in the world.

It also represents a huge opportunity for operators in Africa, where Wärtsilä has developed a range of competitive strategies to deliver efficient and reliable power supply solutions to support the mining sector on its path towards a renewable energy future.

In Tanzania, the Geita gold mine was experiencing reliability issues and power shortages as its ageing power plant was reaching the end of its useful life. It needed a reliable power generation solution to support its growing operations.

Wärtsilä delivered a 40 MW flexible power plant and agreed to a 10-year operation and maintenance (O&M) package, integrating technology with lifecycle services to provide “always-on” power. The plant secures uninterrupted off-grid power supply, eliminating revenue losses from power shortages, while the O&M agreement is tailored to the mine’s day-to-day performance requirements.

Maintenance schedules are optimised to minimize costs and production downtime and enhance fuel efficiency. As a result, fuel savings of around 4%, representing $2 million USD, were achieved in the first year of operation. The flexibility of the installation will also facilitate the transition to renewables over the project lifetime.

In Burkina Faso, Wärtsilä has delivered a 15 MWp solar photovoltaic (PV) power plant to the independent power producer (IPP) Essakane Solar SAS, which supplies the Ekkasine gold mine.  The solar PV plant was constructed next to a 55 MW power plant running on heavy fuel oil. The engine power plant provides backup, while the solar farm produces energy during the day. The capability to control and optimise the usage of the solar PV power and engines enables the gold mine to reduce its fuel consumption by an estimated 6 million litres per year and its annual CO2 emissions by 18,500 tons.

Energy Storage technologies are the true game-changer

The integration of energy storage technologies will be the real game-changer, enabling the industry to take full advantage of cheap and plentiful solar power. They have the unique ability to provide a buffer between supply and demand by delivering or storing energy whenever it is most needed. They will become the key building block of the stable infrastructure needed to improve grid reliability and security.

Hybrid solutions, combining flexible thermal generation with storage and solar power operations are now a realistic and cost-effective solution, as the levelled cost of electricity (LCOE) is lower than ever, and costs of storage are set to decline.

In Mali, at the Fekola mine, located in a remote area with no connection to any larger grid, Wärtsilä is providing an off-grid hybrid solution to provide and maintain microgrid stability. The project combines a 30 MW solar PV plant, a 17.3 MW / 15.4 MW energy storage facility and GEMS, Wärtsilä’s advanced energy management system, with the mine’s existing 64 MW power generator to improve power reliability, reduce heavy fuel consumption, save costs and reduce CO2 emissions.

GEMS is a ground-breaking tool, using smart algorithms to dispatch energy storage and multiple generation assets (thermal and renewable) with the right reserve level to maintain high grid reliability for the mine. Gensets are switched off as solar output increases and are restarted based on forecasted data including load demand and weather. The sophistication of GEMS enables energy production optimization to ensure the lowest LCOE.

In addition to ensuring microgrid stability, the project is expected to generate long-term annual savings of 13.1 million litres of heavy fuel oil and reduce the mine’s carbon footprint by approximately 39,000 tons per year. This hybrid storage project is the first of its kind in Mali and in the mining sector, demonstrating the growing case for clean energy and its sustainable and economic potential for mines in Africa and elsewhere.

Increasing energy reliability and lowering operating costs are essential for the mining sector. The optimal solution to solve the power challenges must allow for fast starting with high off-grid availability, high fuel efficiency, fast load following and part-load efficiency to allow high penetration of renewables. The answer lies in a combination of advanced flexible energy generation strategies and the smart use of renewables to guarantee the delivery of efficient and reliable power in remote off-grid locations. Advanced energy management systems are the key technological element required to support the huge inflows of power from intermittent sources.

With an extensive portfolio of energy storage and flexible solutions for energy-intensive operations, in Africa and the rest of the world, Wärtsilä is the partner of choice to support the mining sector achieve its sustainability and cost-saving goals.

Tarik Sfendla is the Market Development Manager, Africa chez Wärtsilä Energy Business

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The Future of Payments: Key Trends to Watch in 2025

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Luke Kyohere

By Luke Kyohere

The global payments landscape is undergoing a rapid transformation. New technologies coupled with the rising demand for seamless, secure, and efficient transactions has spurred on an exciting new era of innovation and growth. With 2025 fast approaching, here are important trends that will shape the future of payments:

1. The rise of real-time payments

Until recently, real-time payments have been used in Africa for cross-border mobile money payments, but less so for traditional payments. We are seeing companies like Mastercard investing in this area, as well as central banks in Africa putting focus on this. 

2. Cashless payments will increase

In 2025, we will see the continued acceleration of cashless payments across Africa. B2B payments in particular will also increase. Digital payments began between individuals but are now becoming commonplace for larger corporate transactions. 

3. Digital currency will hit mainstream

In the cryptocurrency space, we will see an increase in the use of stablecoins like United States Digital Currency (USDC) and Tether (USDT) which are linked to US dollars. These will come to replace traditional cryptocurrencies as their price point is more stable. This year, many countries will begin preparing for Central Bank Digital Currencies (CBDCs), government-backed digital currencies which use blockchain. 

The increased uptake of digital currencies reflects the maturity of distributed ledger technology and improved API availability. 

4. Increased government oversight

As adoption of digital currencies will increase, governments will also put more focus into monitoring these flows. In particular, this will centre on companies and banks rather than individuals. The goal of this will be to control and occasionally curb runaway foreign exchange (FX) rates.

5. Business leaders buy into AI technology

In 2025, we will see many business leaders buying into AI through respected providers relying on well-researched platforms and huge data sets. Most companies don’t have the budget to invest in their own research and development in AI, so many are now opting to ‘buy’ into the technology rather than ‘build’ it themselves. Moreover, many businesses are concerned about the risks associated with data ownership and accuracy so buying software is another way to avoid this risk. 

6. Continued AI Adoption in Payments

In payments, the proliferation of AI will continue to improve user experience and increase security.  To detect fraud, AI is used to track patterns and payment flows in real-time. If unusual activity is detected, the technology can be used to flag or even block payments which may be fraudulent. 

When it comes to user experience, we will also see AI being used to improve the interface design of payment platforms. The technology will also increasingly be used for translation for international payment platforms.

7. Rise of Super Apps

To get more from their platforms, mobile network operators are building comprehensive service platforms, integrating multiple payment experiences into a single app. This reflects the shift of many users moving from text-based services to mobile apps. Rather than offering a single service, super apps are packing many other services into a single app. For example, apps which may have previously been used primarily for lending, now have options for saving and paying bills. 

8. Business strategy shift

Recent major technological changes will force business leaders to focus on much shorter prediction and reaction cycles. Because the rate of change has been unprecedented in the past year, this will force decision-makers to adapt quickly, be decisive and nimble. 

As the payments space evolves,  businesses, banks, and governments must continually embrace innovation, collaboration, and prioritise customer needs. These efforts build a more inclusive, secure, and efficient payment system that supports local to global economic growth – enabling true financial inclusion across borders.

Luke Kyohere is the Group Chief Product and Innovation Officer at Onafriq

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Ghana’s Democratic Triumph: A Call to Action for Nigeria’s 2027 Elections

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ghana election 2024

In a heartfelt statement released today, the Conference of Nigeria Political Parties (CNPP) has extended its warmest congratulations to Ghana’s President-Elect, emphasizing the importance of learning from Ghana’s recent electoral success as Nigeria gears up for its 2027 general elections.

In a statement signed by its Deputy National Publicity Secretary, Comrade James Ezema, the CNPP highlighted the need for Nigeria to reclaim its status as a leader in democratic governance in Africa.

“The recent victory of Ghana’s President-Elect is a testament to the maturity and resilience of Ghana’s democracy,” the CNPP stated. “As we celebrate this achievement, we must reflect on the lessons that Nigeria can learn from our West African neighbour.”

The CNPP’s message underscored the significance of free, fair, and credible elections, a standard that Ghana has set and one that Nigeria has previously achieved under former President Goodluck Jonathan in 2015. “It is high time for Nigeria to reclaim its position as a beacon of democracy in Africa,” the CNPP asserted, calling for a renewed commitment to the electoral process.

Central to CNPP’s message is the insistence that “the will of the people must be supreme in Nigeria’s electoral processes.” The umbrella body of all registered political parties and political associations in Nigeria CNPP emphasized the necessity of an electoral system that genuinely reflects the wishes of the Nigerian populace. “We must strive to create an environment where elections are free from manipulation, violence, and intimidation,” the CNPP urged, calling on the Independent National Electoral Commission (INEC) to take decisive action to ensure the integrity of the electoral process.

The CNPP also expressed concern over premature declarations regarding the 2027 elections, stating, “It is disheartening to note that some individuals are already announcing that there is no vacancy in Aso Rock in 2027. This kind of statement not only undermines the democratic principles that our nation holds dear but also distracts from the pressing need for the current administration to earn the trust of the electorate.”

The CNPP viewed the upcoming elections as a pivotal moment for Nigeria. “The 2027 general elections present a unique opportunity for Nigeria to reclaim its position as a leader in democratic governance in Africa,” it remarked. The body called on all stakeholders — including the executive, legislature, judiciary, the Independent National Electoral Commission (INEC), and civil society organisations — to collaborate in ensuring that elections are transparent, credible, and reflective of the will of the Nigerian people.

As the most populous African country prepares for the 2027 elections, the CNPP urged all Nigerians to remain vigilant and committed to democratic principles. “We must work together to ensure that our elections are free from violence, intimidation, and manipulation,” the statement stated, reaffirming the CNPP’s commitment to promoting a peaceful and credible electoral process.

In conclusion, the CNPP congratulated the President-Elect of Ghana and the Ghanaian people on their remarkable achievements.

“We look forward to learning from their experience and working together to strengthen democracy in our region,” the CNPP concluded.

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The Need to Promote Equality, Equity and Fairness in Nigeria’s Proposed Tax Reforms

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By Kenechukwu Aguolu

The proposed tax reform, involving four tax bills introduced by the Federal Government, has received significant criticism. Notably, it was rejected by the Governors’ Forum but was still forwarded to the National Assembly. Unlike the various bold economic decisions made by this government, concessions will likely need to be made on these tax reforms, which involve legislative amendments and therefore cannot be imposed by the executive. This article highlights the purposes of taxation, the qualities of a good tax system, and some of the implications of the proposed tax reforms.

One of the major purposes of taxation is to generate revenue for the government to finance its activities. A good tax system should raise sufficient revenue for the government to fund its operations, and support economic and infrastructural development. For any country to achieve meaningful progress, its tax-to-GDP ratio should be at least 15%. Currently, Nigeria’s tax-to-GDP ratio is less than 11%. The proposed tax reforms aim to increase this ratio to 18% within the next three years.

A good tax system should also promote income redistribution and equality by implementing progressive tax policies. In line with this, the proposed tax reforms favour low-income earners. For example, individuals earning less than one million naira annually are exempted from personal income tax. Additionally, essential goods and services such as food, accommodation, and transportation, which constitute a significant portion of household consumption for low- and middle-income groups, are to be exempted from VAT.

In addition to equality, a good tax system should ensure equity and fairness, a key area of contention surrounding the proposed reforms. If implemented, the amendments to the Value Added Tax could lead to a significant reduction in the federal allocation for some states; impairing their ability to finance government operations and development projects. The VAT amendments should be holistically revisited to promote fairness and national unity.

The establishment of a single agency to collect government taxes, the Nigeria Revenue Service, could reduce loopholes that have previously resulted in revenue losses, provided proper controls are put in place. It is logically easier to monitor revenue collection by one agency than by multiple agencies. However, this is not a magical solution. With automation, revenue collection can be seamless whether it is managed by one agency or several, as long as monitoring and accountability measures are implemented effectively.

The proposed tax reforms by the Federal Government are well-intentioned. However, all concerns raised by Nigerians should be looked into, and concessions should be made where necessary. Policies are more effective when they are adapted to suit the unique characteristics of a nation, rather than adopted wholesale. A good tax system should aim to raise sufficient revenue, ensure equitable income distribution, and promote equality, equity, and fairness.

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