How do i contact reliant energy customer service? Reliant Energy Customer Service Phone Number (713) 207-7777, Email, Address. Utility. Reliant Energy 55. Customer Service. Updated on 11/30/2020.What does reliant energy do in texas? Reliant Energy is one of the largest electric companies in Texas with over 1 million residential customers. Reliant provides Houston electricity and Dallas electricity, and services all de-regulated Texas cities with electricity.Is nrg reliant energy a good company? Reliant Energy, an NRG company, provides affordable electricity to more than one million homes and businesses in Texas. Reliant Energy is a trusted provider in the state’s deregulated energy market, offering 24/7 customer support, bill credits for customer referrals, green energy options, and more.How do i get reliant electricity rates? Call Reliant directly for all plans at 833-339-0416. These rates are for Oncor service areas. Pricing shown is based on an exact usage of 1000 kWh. Call Reliant directly for their full range of plans at 833-339-0416. Reliant has a variety of plans to fit your budget, home and lifestyle, including: