January 10, 2018 | tucson.com — State regulators have approved a plan by Tucson Electric Power to move thousands of business customers from its smallest commercial rate plan to rates designed for larger customers.

The Arizona Corporation Commission panel approved the new rate treatment as it approved TEP’s base rates in February 2017, though a second phase dealing with customers who install rooftop solar systems is still pending. The utility panel voted to approve TEP’s small-business rate transition plan in late December and filed its ruling Jan. 3.

TEP had asked the commission for permission to move customers now on the utility’s Small General Service rate to a new Medium General Service rate or to Large General Service rates, if their power usage exceeds certain levels.

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