Variable Rate: With a variable rate, you stand closer to the fire. Rather than keep your costs separate from market conditions, you experience the rise and fall of price alongside your provider. You profit when supply exceeds demand, but could pay through the nose if the electricity grid becomes overtaxed. That usually means a higher bill in the summer and winter (when demand is at its highest) and a lower one in the fall and spring. A variable rate plan is best for people interested in staying on top of market changes – when prices get too exorbitant, there’s no contract and no cancellation fee if you want to try a new provider.
ElectricityPlans lets you easily compare electricity plans by displaying all-inclusive rates at all advertised usage levels in a simple easy-to-read format. You can easily estimate your actual all-in electric bill at any given usage level using our Plan Details and Pricing section for each plan. All energy charges, delivery fees, bill credits, and other fees for each plan are shown so you can accurately estimate your monthly electric bill. By showing all rates and fees, you’ll avoid the electric bill sticker shock and so-called “teaser rates” commonly used by electric suppliers to achieve better search results on sites such as powertochoose.org.
Know that Green Mountain’s cheapest advertised plans are all variable rate plans. “Pollution Free,” “Pollution Free Try 3,” or “SolarSPARC 10 Try 3” all advertise a great initial rate — a full cent below Pennsylvania’s 8.49 cent “price to compare” — but its variable rates means the company can raise them at any time. The two “Try 3” plans just lock in the low introductory rate for three months instead of one. The flipside of fixed rate: Should prices fall, you’ll be locked into a contract with a constant, elevated rate for two more months.

*Only new customer successful enrollments with Constellation. Cards are issued by Virtual Rewards Center. Valid email address required for receipt of Gift card. Gift cards will not have cash access. For any questions about your Gift card, call our customer care team at 1-877-997-9995. The listed merchants are in no way affiliated with Constellation nor are the listed merchants to be considered sponsors or co-sponsors of this program. Use of merchant names and/or logos is by the permission of each respective merchant and all trademarks are the property of their respective owners. Terms and conditions are applied to gift cards/certificates. Please see the merchant gift card/gift certificate for additional terms and conditions, which are subject to change at merchant's sole discretion. Constellation will share your name and email address with Virtual Reward Center for reward fulfillment only. Reward link expires in 3 months.
You’ll also see a flat rate and a price per kWh rate for TDU or TDSP (which stand for Transmission and Distribution Utility or Transportation Distribution Service Provider). These are costs that your utility charges for delivering electricity and maintaining power lines. The costs are unique to your local utility and have nothing to do with your electricity provider.
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