Power, not price, may cap Uganda's mining growth

Uganda's large hydro additions changed the national generation picture materially. Mine processing plants, however, need firm supply at stable voltage at a specific location, and evacuation and distribution infrastructure has not kept pace uniformly across the mineral districts.

This is a familiar pattern across sub-Saharan Africa: national generation statistics and headline capacity additions tend to be reported and celebrated far more than the transmission and distribution build-out required to actually deliver that power to a specific industrial load many kilometres from the nearest substation. The gap between the two is exactly where most mine electrification project delays originate.

Diesel back-up at scale can add a meaningful figure per ounce to operating cost, and it is the first thing to review in any Ugandan project economics that assume grid tariffs. Hybrid solar and storage is increasingly the sensible base case for medium-scale sites.

The economics of hybrid solar and storage have shifted meaningfully in the past several years as battery costs have fallen, to the point that a well-designed hybrid system can now undercut sustained diesel generation over a mine's operating life even before accounting for diesel's price volatility and logistics risk in remote districts. Projects that still model diesel as the base case, rather than as a top-up for a solar and storage system, are likely working from outdated cost assumptions.

Industrial connection to mineral districts is a comparatively cheap way to convert surplus generation into export value. It is also the enabler for onshore processing that the value-addition agenda depends on.

A credible signal that this constraint is being taken seriously would be a published transmission investment plan explicitly sequenced against the mineral districts where licensing activity is concentrated, Busia, Karamoja, Yumbe and the west, rather than a generic national grid expansion plan. So far, public disclosure has tended toward the latter.

A second useful indicator is whether newly licensed medium-scale operators are required, or incentivised, to disclose their power sourcing plan as part of the licensing process. A licence granted without visibility into whether a project intends to rely on grid connection, self-generation or a hybrid solution tells outside observers little about whether the project's stated production timeline is actually achievable.