ABA Editorial · Jul 15, 2025 · 13 min read
Nigeria has Africa's largest economy, approximately 86 million people without reliable grid electricity, and one of the most complex power sector structures on the continent. The Nigerian Electricity Supply Industry (NESI) has been under reform for over a decade. The Nigeria DARES programme targets distributed solar solutions for 17.5 million Nigerians. This report maps the current state of the Nigerian power sector.
Nigeria's power sector is simultaneously one of the largest and one of the most under-performing in Africa. The country has the continent's largest economy with a GDP around USD 364 billion and a population of approximately 228 million people. It has installed power generation capacity of roughly 13 to 14 gigawatts on paper, but available capacity at most times is substantially lower, often in the 4 to 5 gigawatt range, due to gas supply constraints, transmission losses, and distribution bottlenecks. Approximately 86 million Nigerians lack reliable access to grid electricity, meaning that Nigeria alone accounts for a significant share of the continental electrification gap. And yet Nigeria is also the country where the structural opportunity for power sector transformation is largest, because the Mission 300 Nigeria DARES programme is targeting distributed solar solutions for 17.5 million Nigerians, replacing costly diesel generators that currently define how most Nigerian businesses and affluent households get their electricity. This report maps the current state of the Nigerian power sector and the forces that will shape it over the next several years.
The defining feature of Nigerian power economics is the diesel economy. A typical Nigerian small business, factory, office, or middle-class home relies on a combination of grid electricity (when available) and diesel generator backup. Grid supply in most locations is intermittent, with outages lasting hours to days at a time depending on the area and season. Diesel generators fill the gap, at significantly higher per-kilowatt-hour costs than grid electricity would cost if reliable. The cumulative annual Nigerian spending on diesel for power generation has been estimated at several billion dollars, a figure that exceeds what it would cost to build substantial solar replacement infrastructure. This spending represents both a massive commercial opportunity for solar operators (diesel is expensive, solar can displace it) and a hidden tax on Nigerian economic activity (every business pays more for power than it should, reducing competitiveness across the entire economy).
The diesel economy has specific implications for solar adoption. Nigerian businesses do not need to be persuaded that electricity is valuable; they already pay premium prices for it. The question is whether solar alternatives can be delivered at prices and reliability levels that compete with the diesel they replace. For commercial and industrial customers, the answer is increasingly yes, which is why operators including Daystar Power, Arnergy, and Rensource have built substantial hybrid solar-plus-storage businesses serving Nigerian commercial customers.
The Nigerian Electricity Supply Industry (NESI) was unbundled in 2013 through a privatization process that separated generation (Generation Companies or GenCos), transmission (the Transmission Company of Nigeria, which remained government-owned), and distribution (11 Distribution Companies or DisCos serving different geographic areas). The unbundling was intended to create competitive pressures that would drive investment and improve performance. A decade later, the reform outcomes have been mixed. Several of the DisCos have struggled with operational and financial performance. Gas supply to the thermal GenCos has been unreliable. The transmission network has been a persistent bottleneck that limits how much generation can actually reach end consumers.
The Nigerian Electricity Regulatory Commission (NERC) has continued to refine the regulatory framework over the last several years, including tariff reforms that have moved retail prices closer to cost-reflective levels for specific customer categories. In 2024, tariff reforms allowed distribution companies to charge higher prices for premium service bands, on the condition that service reliability for those bands actually improved. The reforms have been controversial among consumer groups but have been credited with improving DisCo finances and creating commercial signals that could eventually drive private investment.
The Nigeria Distributed Access through Renewable Energy Scale-Up (DARES) programme is the largest single Mission 300 component in West Africa. The programme targets distributed solar solutions for approximately 17.5 million Nigerians, replacing diesel generators with renewable alternatives. DARES combines public financing, technical assistance, results-based subsidies, and private-sector delivery through mini-grid developers and solar home system operators. The programme builds on Nigeria's existing regulatory framework for mini-grids, which has been in place long enough for developers to understand and operate within.
DARES is significant because Nigeria has the specific combination of conditions that makes distributed renewable energy commercially viable: high existing willingness to pay for electricity (because customers already pay high diesel costs), adequate solar resource, maturing mobile money infrastructure for customer payments, and an installed base of mini-grid and solar operators ready to scale. The programme architecture includes financing instruments designed to de-risk private investment alongside grant funding that can bridge the gap between what customers can afford and what developers need to operate profitably.
Nigerian thermal generation depends on natural gas, most of which is supplied from Nigerian upstream fields. Gas supply has been chronically unreliable due to pipeline vandalism, payment disputes between GenCos and gas suppliers, and aging infrastructure. Every effort to improve Nigerian grid performance eventually runs into the gas supply constraint. The recent Nigerian Liquefied Natural Gas (NLNG) expansions and domestic gas reform efforts are intended to improve the supply picture, but progress has been slower than policy timelines assumed.
The transmission network is the other persistent constraint. The Transmission Company of Nigeria has been slower to modernize than the GenCo or DisCo segments, and transmission losses remain significant relative to international benchmarks. Investments in transmission capacity, substations, and reactive power compensation are necessary but expensive, and the financing has not yet been mobilized at the scale required.
Three indicators will shape the Nigerian power sector over the next year. First, whether DARES execution accelerates to match the Mission 300 timeline, producing visible increases in distributed renewable deployment across Nigerian states. Second, whether tariff reform continues to improve DisCo financial performance without triggering unsustainable consumer backlash. Third, whether gas supply reliability improves through the combination of pipeline security investments, payment discipline, and new upstream capacity. Nigeria is where Mission 300 will succeed or fail most visibly. The country is too large to ignore and too important to leave behind, and the outcomes of the next eighteen months will shape whether the 2030 continental electrification targets remain credible.