COVID-19 Update:

To protect the health of our staff and our customers, Efficiency Vermont offices are closed to the public. In the meantime, our customer support team is available to help you remotely. Contact us at (888) 921-5990 or

We have cautiously begun scheduling project related site visits when required. You can find more information on our safety protocols here.

The Value of Efficiency: Renewable Ramp Challenge

As the electricity grid increasingly accommodates solar electricity, a problem is emerging: At sunset, non-solar sources of electricity must quickly ramp up. This limits choices for power plants providing the post-sunset electricity and is difficult for traditional power grids to accommodate. In this study, Efficiency Vermont analyzed the effectiveness of specific energy-efficient equipment upgrades in flattening the loads of Vermont businesses and residences. These measures and results were: 1) clothes washers and dryers—minimal effect; 2) refrigerators—slight positive effect; 3) freezers—an excellent vehicle for alleviating the curve; 4) LED lighting—consistent alleviation of the system coincident peak, especially during the coldest weather; 5) cold climate heat pumps—while calculated to improve curve scores on the whole, this measure added to the morning ramp in warm weather (because water heaters have a nearly flat load shape) and improved scores by increasing usage in the early morning hours.

Download the Report