Texas power retailer Griddy Energy LLC on Monday filed for Chapter 11 bankruptcy after the state grid operator cut off the company’s access to customers for unpaid bills following a rare deep freeze in the state. Griddy sold power to customers at market rates. When power prices spiked to $9,000 per megawatt hour (MWh) and remained at that lofty level for days during the extreme cold in February, some customers received monthly bills of over $10,000. That compares with an average price for power of $22 per MWh in 2020 in the Electric Reliability Council of Texas (ERCOT), which operates the state’s power grid. ERCOT last month shut Griddy’s access to the state’s power network and shifted its 10,000 customers to other utilities, as new signs of a financial crisis rose after a state-wide blackout. Griddy said on Monday it is seeking court authority to release its former customers from …