For Businesses

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.

The Smarter Way to Finance Energy Upgrades

Energy efficiency and renewable energy updates can improve building comfort and employee productivity, cut energy costs and boost your bottom line. With financing programs from EFS, it’s easier and more affordable than ever to make the improvements you need.