Contact Us

Please note that our phone lines and several of our portals are unexpectedly down, and we are currently working on a resolution. The New York portals are not affected. When you call us, please leave a message with the best number to reach you, and we will return your call as soon as possible. You can email us at
Please note, Slipstream EFS’s address in Madison has changed to 431 Catalyst Way, Madison, WI 53719. We have not moved, but a new city street has been dedicated adjacent to our property. Mail sent using our old address or PO Box will be forwarded to us for a short time, however, to ensure timely processing of your applications please utilize our new address only.
Financing for energy efficiency improvements - it's something your customers want, something that can help close the sale, and now, with EFS it's easy to provide your residential and commercial customers with an attractive financing option.

Energy Finance Solutions
431 Catalyst Way
Madison, WI 53719

Illinois Residents: 1.877.923.2665

Michigan residents: 1.800.681.2095

New Jersey residents: 1.888.264.4367

New York residents: 1.800.361.5663

All other questions: 1.800.861.1929