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I’d read that giant solar arrays were positioned throughout the city, along with two heliostat power plants on its outskirts.

Heliostat machines on the roof of the Lowline Lab.

In 2011, Google announced that it halted its own heliostat project after researchers could not design an inexpensive model.

Until now, building heliostat plants has been prohibitively expensive.

An engineer at Stellenbosch University's Helio100 project says the team has designed a cost-effective heliostat that harnesses solar power to generate electricity.