Argo expects to sign a fixed-price power purchase agreement in the next few months that will stabilize its electricity expenses and allow it to sell power back to the grid. other peersWall said. The company continues to target a long-term power rate of about 2.5 cents per kilowatt hour (kWh) in Texas, home to its largest mine. The Jefferies team isn’t so sure, expecting power to cost 3.75 cents per kWh across Argo’s portfolio in the fourth quarter of this year and into 2023.