COVID-19 Update:

To protect the health of our staff and our customers, Efficiency Vermont offices are closed to the public. We have cautiously begun scheduling project related site visits when required. You can find more information on our safety protocols here.

We know that you need support in reducing energy costs now more than ever, and we will continue to launch new offers and programs over the course of the summer. In the mean time, our customer support team is available to help you remotely. Contact us at (888) 921-5990 or

Solar thermal works by using mirrors to concentrate sunlight. The concentrated sunlight is then used directly as a source of heat, as in solar water heating. Solar power is generally photovoltaic, where the sun's light is directly converted by solar panels into electricity.