Small Mirrors for Solar Power Tower Plants

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OPEN 2012
San Francisco, California
Project Term:
02/19/2013 - 09/30/2017

Technology Description:

Otherlab is developing an inexpensive small mirror system with an innovative drive system to reflect sunlight onto concentrating solar power towers at greatly reduced cost. This system is an alternative to expensive and bulky 20-30 foot tall mirrors and expensive sun-tracking drives used in today’s concentrating solar power plants. In order for solar power tower plants to compete with conventional electricity generation, these plants need dramatic component cost reductions and lower maintenance and operational expenses. Otherlab’s approach uses a smaller modular mirror design that reduces handling difficulty, suffers less from high winds, and allows the use of mass manufacturing processes for low-cost component production. These mirrors can be driven by mechanisms that utilize simpler, more readily serviceable parts which decreases system downtime and efficiency. The incorporation of low-cost and highly-scalable manufacturing approaches could significantly reduce the cost of solar electricity generation below conventional solar tower plant technologies.

Potential Impact:

If successful, Otherlab’s approach would reduce the cost of installed solar power tower mirror fields by over 70%.


Cost-effective solar energy would increase U.S. renewable energy use and help reduce our dependence on fossil fuels.


Replacing energy systems powered by fossil fuels would provide an immediate decrease in greenhouse gas emissions, of which electricity generation accounts for over 40%.


Cost-effective renewable energy alternatives would reduce fuel prices and stabilize electricity rates for consumers.


ARPA-E Program Director:
Dr. Christopher Atkinson
Project Contact:
Dr. Leila Madrone
Press and General Inquiries Email:
Project Contact Email:

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