Ghana's Electricity Grid Has Tripled in Size. So Why Does It Still Feel Like Not Enough?

A shift in how Ghana generates power tells a bigger story than most people realise.

Ghana's Energy Mix from 2000 to 2024

In 2000, Ghana's electricity story was simple. Nine out of every ten units of electricity came from one source: water. The Akosombo Dam, built across the Volta River in the 1960s, was the backbone of the national grid, and hydropower accounted for 92% of all electricity generated in the country.

By 2024, that figure had collapsed to 39%.

According to the Ghana Energy Commission's 2025 National Energy Statistical Bulletin, Ghana now generates 61% of its electricity from thermal sources, primarily natural gas and oil-based plants. Renewables, despite years of policy attention, contribute just 0.71% of total generation.

This is not a story about failure. Ghana's total electricity generation has grown from 7,224 gigawatt-hours (GWh) in 2000 to 25,550 GWh in 2024, a 3.5-fold increase over 24 years. More Ghanaians have access to electricity than ever before, with the national access rate reaching 89% in 2024, up from 64% in 2010. The grid is bigger, broader, and more connected than at any point in the country's history.

But the composition of that grid has changed in ways that carry real consequences for cost, reliability, and long-term energy security.

From Water to Gas: What Drove the Shift

The transition away from hydropower was not a deliberate policy choice. It was largely a response to crisis.

Ghana experienced severe electricity shortfalls in the mid-2000s and again during the 2012 to 2016 dumsor period, driven partly by declining water levels at Akosombo and growing demand that hydro capacity could no longer meet alone. The government responded by rapidly expanding thermal generation, bringing in gas turbines, oil-fired plants, and emergency power ships to close the gap.

Between 2013 and 2021, Ghana added approximately 2,727 megawatts (MW) of thermal capacity in just eight years. Total installed generation capacity grew from 2,818 MW in 2013 to 5,749 MW in 2024. The lights stayed on, but the fuel bill grew with them.

The Cost Consequence

Thermal generation is more expensive to run than hydro. Gas and oil prices fluctuate with global markets and are denominated in US dollars, meaning a weakening cedi directly increases the cost of keeping the lights on. This structural vulnerability partially explains why electricity tariffs have risen so sharply in cedi terms over the past decade, even as generation capacity expanded.

The average electricity price in Ghana rose from GH₵0.02 per kilowatt-hour in 2000 to GH₵1.16 per kWh in 2024, an increase of roughly 58 times over 24 years, according to the same Energy Commission data.

The Renewable Energy Gap

Perhaps the most sobering number in the dataset is the renewable energy figure. After more than a decade of solar policy frameworks, feed-in tariffs, and renewable energy targets, solar and other non-hydro renewables account for less than 1% of Ghana's electricity generation in 2024.

For context, total installed renewable capacity reached 133 MW in 2024, against a total installed grid capacity of 5,749 MW. The ambition exists on paper. The generation does not yet show up in the numbers.

What This Means for Ghanaian Consumers

The shift from hydro to thermal has made Ghana's electricity grid more capable but also more exposed. More capable because thermal plants can generate power regardless of rainfall or dam water levels. More exposed because fuel costs, exchange rate movements, and global commodity prices now directly influence what Ghanaians pay for electricity every quarter.

The long-term path toward more affordable and stable electricity almost certainly runs through renewable energy, particularly solar, given Ghana's geography and sunlight availability. The data suggests that path still has a long way to go.

Ghana built a bigger grid. The next question is what it is built on.

Data source: Ghana Energy Commission, 2025 National Energy Statistical Bulletin

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