Ethiopia, which has rapidly established itself as one of the world’s leading Bitcoin mining hubs, has just dealt a brutal blow to its operators: a 77% reduction in the electricity supply allocated to cryptocurrency miners.

Behind this drastic decision lies an unforgiving climatic reality: the country’s hydroelectric reservoirs are drying up, forcing the government to make hard choices about its energy priorities. Households and industrial users are taking precedence over mining data centers.

This turning point raises serious questions about the sustainability of the Ethiopian model — and more broadly, about the mining sector’s dependence on intermittent renewable energy sources.

A booming mining sector brought to a sudden halt

Ethiopia had established itself as a prime destination for Bitcoin miners thanks to some of the cheapest electricity on the continent, with more than 90% of its power generated by the Grand Ethiopian Renaissance Dam (GERD). In 2024, Bitcoin miners accounted for 35% of revenues at Ethiopian Electric Power (EEP), the state-owned energy producer — a figure that illustrates just how heavily the country had bet on this industry to generate foreign currency.

But the 2024–2025 dry season has upended that balance. Lower-than-average rainfall triggered a significant drop in reservoir levels, reducing available hydroelectric generation capacity. Faced with this shortfall, EEP applied a triage logic to energy distribution: households and critical industrial sectors were prioritized, pushing mining operations to the back of the queue.

In practice, mining farms operating in Ethiopia have seen their electricity allocation cut by 77% — a reduction that makes any profitable operation virtually impossible in the short term. For large operators who have invested tens of millions of dollars in infrastructure, the impact is severe.

The systemic risk of hydropower for Bitcoin mining

The Ethiopian situation highlights a structural vulnerability that is often underestimated in the mining sector: dependence on non-dispatchable renewable energy sources. Hydropower, unlike solar or wind to a lesser extent, is directly conditioned by climatic variables — rainfall, snowmelt, and watershed management. A prolonged drought can wipe out an entire region’s competitive advantage within a matter of weeks.

The Ethiopian case is not an isolated one. Kazakhstan already experienced similar restrictions in 2022 following grid overload after a massive influx of miners in the wake of China’s mining ban. The key difference here: it is nature itself imposing the rationing, not a purely political decision. This makes the situation all the more unpredictable for operators.

As for the global Bitcoin hashrate, the precise impact has yet to be quantified. Ethiopia represented a growing but still minority share of global computing power. The network’s difficulty automatically adjusts downward in response to a hashrate decline, which mechanically protects the security of the protocol. That said, local operators will either need to migrate their equipment to other jurisdictions or wait for the rains to return and reservoir levels to recover — an uncertain prospect in the context of accelerating climate disruption.

What are the consequences for Ethiopia’s attractiveness?

Beyond the immediate crisis, this decision raises a strategic question for Addis Ababa: how to maintain the country’s appeal to Bitcoin mining investors while ensuring national energy stability? Ethiopia officially regulated Bitcoin mining in 2022, issuing licenses and integrating the sector into its broader economic development strategy. The dollar-denominated revenues generated by miners had become a valuable source of foreign currency for a country under significant monetary pressure.

The 77% power cut risks undermining the confidence of international investors and accelerating the relocation of operations to countries offering greater supply stability — whether that means the United States, the United Arab Emirates, or certain Latin American nations with a more diversified energy mix.

Over the longer term, this episode underscores the imperative for states hosting mining operations to structure energy contracts with clear interruptibility clauses — allowing them to reduce power to miners during periods of grid stress without cutting them off entirely. This is a model that several US states have already adopted, effectively turning miners into flexible demand-response regulators within the electricity grid.