As of my last knowledge update in October 2023, the rates for residential customers of NV Energy Southern NV can vary based on different factors including the customer's energy usage, the time of year, and any applicable rate schedules. Typically, residential customers are charged based on a tiered pricing structure, meaning that the more energy consumed, the higher the cost per kilowatt-hour may become. In addition, there may be seasonal variations in rates. For the most accurate and up-to-date information regarding current residential rates, it is advisable to check the official NV Energy website. This site provides detailed information about different rate plans, current pricing, and any other charges that may apply to residential service.