Until recently, a store selling groceries in a village in Zambia couldn’t sell cold drinks: It didn’t have access to electricity to power a fridge. But the store now has a solar panel on the roof connected to a solar fridge that’s stocked with drinks and ice. The business owner has nearly doubled overall sales.

The store was one of the first to get a new fridge designed by Amped Innovation, a Bay Area-based company that’s now scaling up production of the appliance. They wanted to help tackle a widespread problem—even though the energy grid is quickly growing in Africa, millions of people still aren’t connected or have to deal with frequent outages.

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Source: Fast Company

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