Jack Dorsey’s Block backs bitcoin mining firm bringing affordable

ACCRA, GHANA — Up until February, Janet Maingi didn’t think much about bitcoin. Born and raised in the Kenyan capital of Nairobi, Maingi had instead spent more than twenty years focused on trying to solve one of Africa’s biggest problems: connectivity. To that end, she spent more than 20 years working in operations in the telecom industry, in companies specializing in internet and wireless networks to cable and satellite television. But earlier this year, the 45-year-old mother decided to take on the continent’s second-biggest issue: Its energy problem.

Africa is a renewable energy mecca. There’s an estimated 10 terawatts of solar capacity, 350 gigawatts of hydro, and another 110 gigawatts of wind, according to data from Energy, Capital & Power, an investment platform focused on Africa’s energy sector.

Some of this renewable energy is being harnessed already, but a lot of it isn’t, because it is expensive to build the kind of specialized infrastructure necessary to capture it. Even though Africa boasts 60% of the best solar resources globally, the continent only has 1% installed solar PV capacity, according to the International Energy Agency.

“When you sit back and look at rural Africa and rural Kenya, one of the things that is very prevalent in the homes — I am talking about the 50% that are not electrified — is children have to do their assignments using either paraffin lamps or candles,” Maingi told CNBC on the sidelines of the Africa Bitcoin Conference in Accra.

“Think of their eyesight, think of their health,” she said.

Maingi was frustrated by the divide between generation and capacity, given that 43% of Africa’s population, or 600 million people, lack access to electricity. So in February, she began spitballing creative solutions with two friends, and the three of them landed on a sort-of counterintuitive idea: bitcoin mining.

Mining for the world’s biggest cryptocurrency is a process known as proof-of-work. Miners around the world run high-powered computers that collectively validate transactions and simultaneously create new tokens. The process requires a lot of electricity, and because this is the only variable cost in a low-margin industry, miners tend to seek out the world’s lowest-cost sources of power.

Bitcoin gets a bad rap for the amount of energy it consumes, but it can also help to unlock these trapped renewable sources of energy. Bitcoin miners are essentially energy buyers, and when they co-locate with renewables, it creates a financial incentive for buildout and improves the core economics of renewable power production. The IEA says that in rural areas “where over 80% of the electricity-deprived live, mini-grids and stand-alone systems, mostly solar based, are the most viable solutions.” 

By May,…