Agsol solar mills: Nairobi entrepreneurs push off-grid power

Agsol is selling solar-powered grain mills in and around Nairobi that reduce fuel spending and improve shop-owner margins. The mill’s initial cost is about $1,300, and operating an Agsol machine can be up to 80% more profitable once that cost is paid off, which the company says takes between six and 12 months.

What is Agsol selling in Nairobi?

Agsol makes a milling machine that runs on solar energy or on grid electricity, and the company launched its first product in 2018. The mills are being used by small shop owners who offer milling as a service; one Nairobi shopkeeper, Milcah Wanjiru, has used an Agsol mill since December 2025. Agsol is based just outside Nairobi and has received orders from as far as Mozambique and Angola.

How do the mills change the economics for shop owners?

About 40% of what shop owners who use diesel-powered mills charge customers goes toward paying for fuel, according to Agsol’s CEO Matt Carr, whereas operating Agsol’s solar-powered machine can be up to 80% more profitable after the roughly $1,300 upfront cost is recovered. Carr says the payback period is between six and 12 months. The solar machine also accepts very small amounts of grain, a practical advantage that has drawn additional customers for some operators.

The mills have tradeoffs. Wanjiru told Agsol’s CEO, "It can be slow," describing jams that occur when damp grain collects at the mill’s feeding chamber. Carr explains the machine reduces its speed when grain is damp to squeeze out more flour, a safety or efficiency behavior that can lead to the jamming she described.

How does this fit into Kenya’s wider energy picture?

Most of Kenya’s power grid runs on renewables, yet 25% of communities lack centralized electricity, which has pushed the country to explore off-grid solar as part of its plan to deliver universal electricity access by 2030. The improved economics of solar technology have helped: a couple of years ago a panel cost about $3 a watt, the article notes, and now "it’s down to cents." Agsol has raised over $4 million in investment, much of it via a UK government program that supports clean energy projects in the region.

Why it matters

Small businesses that mill grain act as local hubs for sales and services in low-income neighborhoods. Cutting the share of revenue spent on fuel from roughly 40% to a much lower number after payback shifts income toward owners rather than diesel suppliers. If machines like Agsol’s scale across regions that lack centralized power, they could reduce operating costs for microenterprises and lower emissions by replacing diesel-burning mills.

Agsol’s traction is concrete: last year the company sold 530 units, a sales figure that shows demand beyond Nairobi and a capacity to supply customers in neighboring countries. The company’s orders from Mozambique and Angola indicate the product has appeal beyond Kenya’s borders.

What to watch

Watch whether Agsol can address the damp-grain jamming issue Carr described and whether payback timelines hold as the company scales. Also note how policymakers factor off-grid solutions into Kenya’s 2030 electrification push, and whether declining panel prices continue to cut upfront costs for small enterprises.

Geoffrey Kamadi is the Nairobi-based reporter who provided the on-the-ground reporting for this story.