1. After your contract ends, the energy company will send you a notification of your rate increasing to a variable rate (which usually translates to 2-3 cents higher/kWh by a certain date). They are supposed to notify you of this change. I've noticed as a customer, we get short-changed of one month from the contract rate (if you signed for 7 cents for 6 months, you'll only get that for 5 months). If you don't call, your rate goes up significantly if you don't call to change to a cheaper contract. Tell them you want the cheapest rate or you will cancel with their company.
On the one hand, long-term, fixed-rate (contract) plans offer stability in pricing. If energy supply costs suddenly go up in your area, you won’t be left paying more than what you bargained for. You’ll have peace-of-mind. If you want to switch out of your contract before it ends with a lower cost plan, you’ll likely face a cancellation fee (early termination fee).