September 2, 2017 | — Tucson Electric Power Co. is turning to an age-old technology to back up new renewable-energy resources.

A hint: It’s essentially the same technology you use every time you drive your car.

The company plans to build a new power plant using giant reciprocating natural-gas engines — similar to internal-combustion engines that have been around since the 1800s — on the grounds of its mainly gas-fired H. Wilson Sundt Generating Station on East Irvington Road.

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