This is one area where going green and saving money diverge. The cheapest renewable tariffs tend to cost more than the cheapest standard tariffs, so it really is a question of your personal politics. However, if you can afford to go renewable, then it's a help to the environment, and all the main comparison services allow you to compare renewable tariffs.
Variable Rate Plans: Designed as month-to-month contracts, these plans are in total control of your energy provider, which can shift the price you pay per kWh at its discretion. This means you, the consumer, are in a better place to reap the benefits when the energy market falls — but it also means you're at risk for hikes in prices, whether as a result of natural disasters or the provider's bottom line. Variable plans always offer a full year of price history to show the average price per kWh so you can get a sense of what you're getting into (like this one from Reliant) and know this: Variable plans don't have cancellation fees. You can cut your service at any time — a huge incentive for REPs to keep their prices reasonable.
After Senate Bill 7 went into effect in January 2002, nearly 6 million power customers became eligible to choose their energy supplier. That number has grown through the years. By deregulating the state’s energy market, the Texas Senate gave constituents the power to choose. The process of energy deregulation in Texas dismantled the utilities’ monopoly over the electric market and encouraged customers to explore their energy options.
Twenty-nine states have deregulated electricity, natural gas or both. That allows you to shop for the supply portion of your bill from alternative providers who may offer rates lower than the default supplier – usually a utility. Delivery services and billing will remain the responsibility of the local utility as they own the power lines and wires that keep the lights on.