By Dhiladhila Magazine · Issue 15
A solar farm is a construction project before it is a power station. Omburu was 40 hectares of tracking panels raised in dry Erongo.
Before Omburu was a power station it was a building site: about 40 hectares of semi-arid Erongo ground some 15 kilometres from Omaruru, cleared, levelled and fitted with rows of sun-tracking panels. The 20 megawatt plant took shape over roughly fifteen months, and the engineering, procurement and construction contract was the instrument that turned a tender into a completed asset.
The appeal of solar is the clean power at the end. The reality that decides whether a plant is cheap is the construction: the tracking system, the civil works and the grid connection that have to be built to last in heat, dust and distance.
The contract that builds the plant
Omburu was delivered under a single engineering, procurement and construction contract, awarded in December 2020 to a joint venture of two Namibian firms, HopSol Africa and Tulive Private Equity, both based in Windhoek. A turnkey contract of this kind hands one party the design, the buying of modules and equipment, and the on-site build, so the utility deals with one accountable contractor rather than many.
That structure concentrates both risk and skill. It let a domestic joint venture carry a national-scale build and show that Namibian firms can deliver utility-scale solar, which matters more for the plants that must follow than for this one alone.
One turnkey contract, two local firms: the build tested domestic capacity as much as the site.
Why the panels move
Omburu uses a single-axis horizontal tracking system, so the panels tilt through the day to follow the sun from east to west. Tracking lifts the energy a given array captures compared with fixed panels, but it adds moving parts, motors and controls that have to keep working in a dusty, high-glare setting with little margin for downtime.
That trade is deliberate. On a good solar site, the extra output a tracker wins over the plant’s life outweighs its added maintenance, which is why a utility optimising for cost per unit chooses the more complex, higher-yield design rather than the simplest one.
The panels move because the extra sunlight they catch is worth more than the mechanism costs to keep.
Distance and dust set the budget
Building on dry ground far from a major centre shapes every line of the cost. Materials travel, water for construction and cleaning is scarce, and the finished plant must survive heat, wind-blown dust and long intervals between maintenance visits. Remote solar construction is not city solar priced up; it is a different set of constraints.
Dust is the standing enemy. A soiled panel loses output, so the design has to account for cleaning and durability in a place where water is precious, and the cheapest plant over its life is the one that keeps producing with the least intervention.
The build also had to reach the grid. A generating plant is only useful once its power can be evacuated, so the works included the connection that ties Omburu into the national network near the Omburu substation. That interface between a new solar field and an existing grid is often where remote projects meet their hardest engineering, because the plant and the network have to be matched exactly and commissioned together.
On a remote site, distance and dust write the budget long before the panels do.
The engineering read
For a contractor or an engineer, Omburu is a study in repeatable, unglamorous delivery: a turnkey contract, a proven tracking design, and a site chosen for sun rather than convenience. Completed on budget in about fifteen months, it is the kind of build a utility wants to standardise and repeat, not reinvent each time.
The property risk is the reverse of the reward. Underbuild the civils and the plant fails early in the heat; overbuild them and the capital cost undermines the low running cost that makes solar worth having. The winning design is the one another site can copy.
The best solar build is the boring one: standard, durable and ready to be built again.
For a contractor, an engineer or an infrastructure investor, Omburu is a preview of where Namibian generation building is heading: turnkey contracts, domestic joint ventures, remote sun-rich sites and a premium on durable, low-maintenance design. The decision it poses to the next bidder is whether to treat each solar plant as a bespoke project or to build, as Omburu largely did, a standard template that can be raised again and again across the country’s dry interior.
Sources: NamPower 2022 Annual Report; Namibia launches tender for 20MW Omburu solar PV plant (Construction Review); Namibia: EPC contractor sought for Omburu solar (African Energy)
