Zambia's State Utility Builds Solar as Grid Owner, Blocking Competition, The Vertical Integration Trap

Diggers reported in July 2026 that Kiyona Energy, a subsidiary of Zesco Limited (Zambia's state-owned utility), installed a 48-megawatt solar plant in Chongwe worth $38 million, with 40 megawatts feeding into the national grid by September.^[1] A second 10-megawatt plant, built in partnership with China Xi, was also under construction at a cost of about $8 million.^[1] The news arrived as progress; Zambia's grid is severely strained, and solar is cheap. But the structure reveals a deeper problem: Zesco owns the generation, owns the wires, sets retail rates, and now controls who gets to compete.

This is vertical integration, the same mechanism that kept US rooftop solar from scaling for a decade. When a utility owns generation it can build, distribution it controls, and the customer contract it writes, independent power producers and household solar installers face a rigged interconnection queue, punitive demand charges, and retail rates designed to make self-supply uneconomical. Zesco's move is not corruption; it is standard utility strategy worldwide. The firm also operates a rooftop solar financing scheme for its own employees, marketed through Kiyona,^[5] which creates a conflict: every kilowatt a household generates is a kilowatt the utility does not sell. Utilities in that position routinely slow or deny interconnection requests, impose engineering reviews and equipment standards that favor utility-scale plants, and lobby against net-metering rules that would let customers export power.

The comparison is instructive. Germany broke this lock by separating generation from distribution and retail through law: network operators must treat independent generators and household solar as grid assets, not competitors, and interconnection is a right, not a favor.^{Australia's Small-scale Renewable Energy Scheme uses upfront rebates to put customers directly in the hardware market rather than forcing them to negotiate with the utility.} Vietnam's feed-in tariff, before policy whiplash, simply promised a fixed price for any rooftop solar fed to the grid, stripping the utility's ability to throttle competition at the interconnection stage.

For Zambia, the stake is immediate. Grid demand exceeds supply; households pay among the world's highest effective tariffs (in purchasing-power terms) for unreliable power. A thriving rooftop market could absorb demand, reduce grid stress, and lower household bills without waiting for Zesco to build enough plants. But if Zesco owns both the supply and the wires, and sets rates to ensure profits from every kilowatt sold, independent solar will remain marginal. The mechanism is not technical; it is regulatory. Zambia has no unbundling law separating generation from distribution, no net-metering guarantee, no independent regulator with teeth to enforce open-access rules for small generators.

The alternative exists and is operational elsewhere: require Zesco to treat household and independent solar as grid supply, not load competing for market share. Guarantee interconnection by right (with safety inspections, not discretionary engineering review). Set a mandatory feed-in tariff or a net-metering formula that lets customers offset their own consumption and export surplus at a fair rate. These are not subsidies; they are property rights. They move the incentive from Zesco building more generation to Zesco managing the grid efficiently, which is what it should do.

Until those rules exist, Kiyona's $38 million solar plant will supply power while Zambia's households remain locked out of the market that could relieve them.