Which ones the best? Like all things energy, it depends. Do you prefer predictability, or do you like the idea of potentially saving some cash by monitoring the market? Our (albeit conservative) recommendation: Fixed rate is probably best. Energy prices are on the rise — the U.S. Energy Information Administration predicts a 3 percent increase in residential electricity prices in 2018.
Knowing how much electricity you use each month is important to finding the cheapest electricity plan. For Houstonians, usage is typically the lowest in the winter and highest in the summer. Your specific usage levels can be determined by simply looking back at previous electric bills and finding the kWh used. To avoid electric bill surprises during the peak summer months, you’ll need to accurately know your peak electricity usage which typically occurs in August.
Both tariffs are available with either paper or paperless (online) billing. E.ON participates in the Warm Home Discount scheme for some customers. There are no exit fees if you decide to leave this supplier within 14 days. If you change your mind after that time, you’ll be charged exit fees of £25 per fuel. Exclusions apply, including the type of meter you own, so make sure you read the additional terms and conditions.  
Then, in 2002, Texas deregulated the electricity market and everybody cheered!  Except that, sure, deregulation opened up the market to competition that may (or may not) have resulted in lower rates, but it introduced a whole host of other issues.  These issues may not have been factors before but now they’re critical when you’re on the look-out for cheap Houston electricity providers.