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South Africa-based renewable energy startup Sun Exchange has raised $3 million to close its Series A funding round totaling $4 million.
The company operates a peer-to-peer, crypto-enabled business that allows individuals anywhere in the world to invest in solar infrastructure in Africa.
How’s that all work?
“You as an individual are selling electricity to a school in South Africa, via a solar panel you bought through the Sun Exchange,” explained Abe Cambridge, the startup’s founder and CEO.
“Our platform meters the electricity production of your solar panel. Arranges for the purchasing of that electricity with your chosen energy consumer, collects that money and then returns it to your Sun Exchange wallet.”
It costs roughly $5 a solar cell to get in and transactions occur in South African Rand or Bitcoin.
“The reason why we chose Bitcoin is we needed one universal payment system that enables micro transactions down to a millionth of a U.S. cent,” Cambridge told TechCrunch on a call.
He co-founded the Cape Town-headquartered startup in 2015 to advance renewable energy infrastructure in Africa. “I realized the opportunity for solar was enormous, not just for South Africa, but for the whole of the African continent,” said Cambridge.
“What was required was a new mechanism to get Africa solar powered.”
Sub-Saharan Africa has a population of roughly 1 billion people across a massive landmass and only about half of that population has access to electricity, according to the International Energy Agency.
Recently, Sun Exchange’s main market South Africa — which boasts some of the best infrastructure in the region — has suffered from blackouts and power outages.
Image Credits: Sun Exchange
Sun Exchange has members in 162 countries who have invested in solar power projects for schools, businesses and organizations throughout South Africa, according to company data.
The $3 million — which closed Sun Exchange’s $4 million Series A — came from the Africa Renewable Power Fund of London’s ARCH Emerging Markets Partners.
With the capital, the startup plans to enter new markets. “We’re going to expand into other Sub-Saharan African countries. We’ve got some clear opportunities on our roadmap,” Cambridge said, referencing Nigeria as one of the markets Sun Exchange has researched.
There are several well-funded solar energy startups operating in Africa’s top economic and tech hubs, such as Kenya and Nigeria. In East Africa, M-Kopa sells solar hardware kits to households on credit, then allows installment payments via mobile phone using M-Pesa mobile money. The venture is backed by $161 million from investors including Steve Case and Richard Branson.
In Nigeria, Rensource shifted from a residential hardware model to building solar-powered micro utilities for large markets and other commercial structures.
Sun Exchange operates as an asset free model and operates differently than companies that install or manufacture solar panels.
“We’re completely supplier agnostic. We are approached by solar installers who operate on the African continent. And then we partner with the best ones,” said Cambridge — who presented the startup’s model at TechCrunch Startup Battlefield in Berlin in 2017.
“We’re the marketplace that connects together the user of the solar panel to the owner of the solar panel to the installer of the solar panel.”
Abe Cambridge, Image Credits: TechCrunch
Sun Exchange generates revenues by earning margins on sales of solar panels and fees on purchases and kilowatt hours generated, according to Cambridge.
In addition to expanding in Africa, the startup looks to expand in the medium to long-term to Latin America and Southeast Asia.
“Those are also places that would really benefit from from solar energy, from the speed in which it could be deployed and the environmental improvements that going solar leads to,” said Cambridge.
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Nigerian startup Rensource Energy has raised a $20 million Series A round co-led by CRE Venture Capital and the Omidyar network.
The renewable energy company builds and operates solar-powered micro-utilities that provide electricity to commercial community structures, such as open-air trading bazaars.
Launched in 2016, the startup has shifted its operating strategy. “We’ve pivoted away from a residential focus…and we’re building much larger systems to become essentially the utility for these large urban markets we have a lot of in Nigeria,” Rensource co-founder Ademola Adesina told TechCrunch.
The company has a partnership with German manufacturer BOS AG, with whom it designs specialized panels for it use case. Rensource also has developer teams in Nigeria and Europe for its software-related programs.
In addition to becoming a micro-energy provider to Nigeria’s robust SME classes, the startup aims to offer them B2B services. With the $20 million round, Rensource is launching its Spaces Offline to Online platform for supply-chain services, including business-analytics and working capital options.
“It’s a mini-ERP tool. We’re trying to bring a universe of people who are banked, but…still offline — their products are offline, they don’t track anything, and there’s no data behind their business — online,” said Adesina.

The benefit Rensource seeks to deliver to Nigeria’s SMEs — at a profit for itself — is to lower overhead costs through better business practices and free them from the bane of generators.
Across marketplaces in West Africa, noisy, fuel-guzzling and pollution-producing generators are like an unwelcome, yet necessary business partner.
Lack of affordable and reliable electricity in Nigeria creates a massive real and opportunity cost to Africa’s largest economy.
For perspective, the West African country is roughly the size of Texas, with a 200 million population larger than Russia, and generates less gigawatt hours of electricity annually than the U.S. state of Connecticut.
Nigerian businesses (and citizens) adjust for these power deficiencies by spending on diesel fuel and generators.
The IMF’s 2019 Nigeria report quoted economic losses of $29 billion in Nigeria due to unreliable electricity supply. On global Doing Business rankings, Nigeria ranked 169 out of 190 countries in the category of “Getting Electricity.”
This difficulty and cost weighs particularly heavy on Nigeria (and the continent’s) SMEs, which often operate in Africa’s informal economy — projected to be one of the largest off-the grid commercial spaces in the world.
Rensource’s micro-utility model deploys power clusters — made up of solar-panels, batteries and a power management system — adjacent to markets and commercial hubs. The energy application isn’t totally clean, as the startup still uses its own diesel backup system.
Rensourse has used this model to become an off-grid energy provider in six states in Nigeria, and powers the Sabon Gari market — one of the country’s largest, located in northern Kano State.
The company plans to expand to 100 markets within Nigeria and to additional African countries within 24 months, according to Adesina.
Rensource generates revenue from charging merchants daily, weekly or monthly fees. “In 2017, we did a few hundred thousand dollars in revenue. Last year we did about $7 million in revenue, and this year we’ll do better than that,” Adesina said.
The company doesn’t release official financials, but generated a small profit last year, according to Adesina. He named deploying more of its micro-utilities to new markets and diversifying services as the path to long-term profitability.
Rensource differentiates itself from many home-kit solar energy startups in Africa, such as M-Kopa, by becoming a renewable energy utility at scale.
The startup’s CEO sees the model as a classic leapfrog tech business, effectively bypassing Nigeria’s deficient electricity grid and providing a less capital intensive alternative to large (and often complicated) energy infrastructure projects.
Rensource is also following a trend by some Nigeria-based startups, such as trucking-logistics company Kobo360 and motorcycle ride-hail company Gokada, to shape a suite of additional services around the needs of core clients.
In Rensource’s case, those clients are SMEs and traders in the informal economy. “This informality of theirs is what we see as an opportunity in building this new business line and bringing these [merchants] into the online world,” said Adesina.
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