• Kamoa-Kakula in DRC and Baomahun in Sierra Leone are pulling CrossBoundary Energy into Africa's first baseload solar-and-storage offtake deals

• CrossBoundary Energy raised $200 million in debt from Standard Bank and $40 million in equity from Inspired Evolution within six months

• Storage now converts daytime solar into round-the-clock power for $33 per megawatt-hour, undercutting on-site diesel at roughly $370 per MWh

CrossBoundary Energy, a Nairobi-based developer that owns and operates clean-power plants for businesses across sub-Saharan Africa, secured $40 million in equity from pan-African climate fund Inspired Evolution last week, six months after closing a $200 million senior debt facility arranged by Standard Bank of South Africa Ltd. The combined $240 million haul over half a year is the largest disclosed capital raise by a commercial-and-industrial renewable platform on the continent in 2025-26.

The two financings are anchored by mining contracts. CrossBoundary's flagship project, a 222-megawatt-peak solar facility paired with a 526-megawatt-hour battery system, is under construction at the Kamoa-Kakula copper complex in the Democratic Republic of Congo, the largest copper operation in Africa with a capacity of 600,000 tonnes a year. A second project, a hybrid plant for the Baomahun gold mine in Sierra Leone operated by FG Gold, is in advanced development. Both supply 30 megawatts of guaranteed dispatchable power with 95% annual availability, according to project documents on CrossBoundary's website.

"Africa's most significant hindrance to growth and investment is access to reliable and affordable power. Projects like these prove that distributed clean energy can now provide cheaper baseload power, even for heavy industry," Matthew Tilleard, managing partner at CrossBoundary Energy, said in a statement on the company website. Tilleard co-founded CrossBoundary Group in 2011.

The shift redraws how African renewable assets are financed. Mining offtakers sign 15- to 20-year power-purchase agreements indexed in dollars and backed by global parent balance sheets, turning solar projects into infrastructure-grade credit. That risk profile attracts senior debt from commercial banks and equity from climate-mandated funds, allowing ticket sizes once reserved for utility-scale public procurement.

Cost inflection

The economics shifted in 2024 and 2025. Storage now converts daytime solar into fully dispatchable power for around $33 per megawatt-hour, the African Solar Industry Association said in its 2026 outlook published in January. That undercuts on-site diesel generation, which the same report estimates at $370 per megawatt-hour based on a $0.85-a-litre diesel price recorded in Nigeria last year. A 100-megawatt solar farm in Mauritius is delivering electricity at seven cents per kilowatt-hour, a level once judged unattainable for storage-backed solar.

Falling battery cell prices, mostly driven by Chinese imports, account for most of the decline. Africa added 2.4 gigawatts of new solar capacity in 2025, with battery-energy-storage systems taking a growing share, according to Africa Solar Outlook 2026. Almost every utility-scale project signed in the past 12 months pairs solar with batteries, where standalone solar dominated as recently as 2023. The trend is sharpest in markets with weak grids, where on-site generation now displaces both diesel and unreliable utility supply.

The mining pipeline is concentrated. CrossBoundary Energy lists Rio Tinto, Ivanhoe Mines, Unilever, Diageo, Heineken and Devki Group as offtakers across a $680 million portfolio totaling 500 megawatt-peak of generation and 600 megawatt-hours of storage. Anglo American Plc's Sishen iron-ore mine in South Africa runs a 100-megawatt solar plant with a 50-megawatt-hour battery. Tata Chemicals' Magadi soda mine in Kenya operates a 12-megawatt solar plant with 6 megawatt-hours of storage, cutting diesel use by 35%.

Mine-anchored solar carries concentration risk. Half of CrossBoundary's contracted capacity is exposed to copper and gold price cycles. Kamoa-Kakula was disrupted by seismic flooding in May 2025, briefly halting operations at the mine that anchors the company's largest project. A prolonged downturn in metal prices, or operational shutdowns, could compress cash flows on power purchase agreements (PPAs) that lenders treat as quasi-sovereign credit.

The next test arrives mid-2026, when CrossBoundary Energy is scheduled to start construction on the Baomahun hybrid plant and to commission the first phase at Kamoa-Kakula. Both projects will be tracked by lenders weighing exposure to a sector where the offtake side is consolidating around a handful of multinational miners and the technology side is still cutting prices.

Idriss Linge