Berkshire Hathaway, the investment firm headed by Warren Buffett, has invested $22.5 million in eVolution Networks, a company that has developed a technology to use cell phone base stations more efficiently saving energy, The Times of Israel reported Thursday.

With its Smart Energy Solution (SES) technology, eVolution conducts both a thorough radio coverage analysis and a deep study of typical daily traffic patterns for each existing base station across the network and creates individual traffic and radio profiles for each. The information allows the network to list the stations that can be safely deactivated while still maintaining coverage and service integrity.

Base stations use large amounts of energy, so turning them off when they’re not needed can lead to significant savings in energy usage. Electricity makes up one third of the operating costs of a cellular network.

Buffett, who first invested in Israel in 2006, said two years ago that Israel was the “most promising investment hub” outside of the United States.

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