Energy Utility go Results Found: 3 Button group with nested dropdown CenterPoint Energy P.O. Box 4981 Houston TX 77210 (713) 207-2222 Visit Website Reliant, an NRG Company Reliant, an NRG Company 1201 Fannin St. Houston TX 77002 (713) 537-2328 Visit Website RWE Clean Energy LLC RWE Clean Energy LLC 1401 E. 6th St., Ste. 400 Austin TX 78012 (858) 922-5508