Yes, you can switch back to your old electricity provider after enrolling with Green Mountain Energy, but there are some important considerations to keep in mind. When switching electricity providers, it is essential to check for any terms or conditions related to your current enrollment with Green Mountain Energy. For example, there may be a specific contract length or termination fees that you could encounter if you decide to switch before the end of your contract. Additionally, some providers may have their own policies regarding re-enrollment or may offer incentives to stay with them. It is advisable to review the agreements and policies of both Green Mountain Energy and your previous provider to ensure a smooth transition. It is wise to look on the current Green Mountain Energy website for detailed information about their policies and any potential charges that may apply when switching back to a previous provider.