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UNS Energy Corporation

UNS Energy is the Tucson, Arizona-based parent company of Tucson Electric Power (TEP) and UniSource Energy Services (UES), utilities that provide safe, reliable energy to about 694,000 customers. In 2020, the companies met a peak natural gas demand of          107 TJ and a peak electricity demand of 3,309 MW.

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2,057

employees

163,000

natural gas customers

531,000

electricity customers

  • 3,233 MW generating capacity
  • Regulated by Arizona Corporation Commission
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Projects

New Generation to Support Increased Renewable Resources

TEP has installed efficient natural gas-fired reciprocating internal combustion engine (RICE) generators at its largest local power plant. The flexible, responsive units can ramp up and down quickly to support the company’s increased use of intermittent solar and wind resources.

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Community

UNS Energy Volunteerism Option 1

A culture of community investment

Tucson Electric Power and UniSource are dedicated to improving the quality of life in the communities we serve, beyond providing safe, reliable power. Together, they assisted 290 local agencies and  provided more than 28,000 hours of volunteer service in 2019. 

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