The creation of a spark

Since the beginning, Slipstream has been at the forefront of energy solutions. The richness of our history may make us industry pioneers, but that doesn’t mean we rest on our accomplishments. We believe that our past serves as a starting point—a spark—for our future. We’ve had fantastic success, and we’ve learned from our failures. These experiences have allowed us to build one of the most influential legacies in the industry. We’re proud of the legacy we’ve left so far, and we look forward to creating a new one every day.



Illinois map with counties

Slipstream EFS launched the Illinois Energy Loan Program

This utility on-bill financing program encourages high efficiency measures for residential customers and brings together all the Illinois IOUs into one collaborative program.



Slipstream logo

WECC and Seventhwave merged to form Slipstream

With a track record of innovation and high-impact, energy-savings programs, the two organizations came together to solve some of the toughest problems around saving energy and to drive equity in the clean energy transition.



EFS former logo

WECC's EFS closed its 50,000th loan for residential energy savings projects

EFS loan volume totals over $490 million since launch.



PACE WI logo

WECC launched statewide administration of the PACE Wisconsin program

PACE Wisconsin finances commercial energy efficiency upgrades that reduce energy use and emissions, save building owners and tenants money, and foster economic development.



Green Masters Program logo

The Wisconsin Sustainable Business Council named WECC a Green Master

The Green Masters program encourages continuous improvement in sustainability efforts.



Seventhwave logo

New name for Energy Center of Wisconsin

ECW changed its name to Seventhwave to better illustrate its national impact on energy and climate.



office at 749 University Row, Madison

ECW moved its headquarters to a multi-tenant LEED platinum building

ECW staff influenced the overall building design, especially in terms of geothermal systems, lighting, and daylighting. Download our fact sheet.



NASA Stennis Space Center, Mississippi

Climate impact and building resilience

ECW provided guidance to NASA's Stennis Space Center in Mississippi to help the campus select the best energy efficiency measures to adapt to future climate variability. Download our research results.



Wisconsin Welcomes You sign

WECC established the Wisconsin Energy Efficiency Program (WE2), a residential and commercial energy efficiency program for the City of Milwaukee, Madison, and Racine

WE2 offered project development services, rebates, and financing to achieve a goal of better than 15 percent energy savings in buildings. WECC managed all aspects of program design and delivery with program funding provided through a U.S DOE Energy Efficiency Conservation Block Grant for the Better Buildings Neighborhood Program. Energy efficiency upgrades were completed on 2,000+ residential (single- and multi-family) and 300 commercial buildings with actual average energy savings per building of 30 percent, doubling the grant goal.

New York map drawing

WECC’s EFS worked closely with NYSERDA to develop loan products using capital made available through the Green Jobs, Green New York legislation

Loan products included residential unsecured and on-bill repayment (OBR). The OBR program was the first statewide on-bill repayment option available.

open office

Expanded Midwest presence

ECW opened offices in Chicago and Minneapolis.



power button

Minnesota plug load study

ECW published a ground-breaking Minnesota study quantifying savings opportunity from consumer plug loads, including illuminating consumer motivations. Watch our webinar.

Weatherization Assistance Program Evaluation

National WAP Evaluation

As a core member of the U.S. DOE’s evaluation of the national low-income Weatherization Assistance Program, ECW conducted national field work to provide new insights on indoor air quality impacts from weatherization. Download the results.



Chicago skyline

New service for ComEd customers

ECW launched ComEd’s first commercial new construction program. ECW’s leadership quickly gave ComEd over 50% market share during a construction boom in northern Illinois.

Energy Efficiency Guidebook for Public Power Communities

Energy efficiency guidebook for public power communities

ECW created this resource to provide step-by-step recommendations for energy efficiency program design, implementation, tracking, and evaluation. Download the guidebook.



webinar screenshot

ECW launched video-based learning

After more than a decade of providing continuing education in the classroom, ECW created a suite of online courses to reach customers worldwide. Check out our current collection of webinars and videos.

New Jersey skyline

Energy efficiency financing in New Jersey

The New Jersey Clean Energy Program, the Board of Public Utilities, and select gas and electric utilities, partnered with WECC's EFS to offer financing programs to help most New Jersey homeowners install qualifying eligible energy efficiency measures.

Midwest map drawing

ECW created the Midwest Energy Survey

This tool measured public attitudes, awareness, and practices on energy efficiency and climate.

parking lot with solar panels

WECC's new Charmany Drive headquarters

WECC’s new headquarters boasts a 19 kW PV system in Dane County, Wisconsin. The building earned LEED Gold certification.



building exterior

Back of the Envelope Calculator

ECW saw that design professionals needed better information early in the building design process to make good energy decisions. We created the Back of the Envelope Calculator – a free, online tool that allows design professionals to make early decisions about the building as an energy system. Architects and engineers can enter various design parameters, see real-time connections between components, isolate the effects of changing one parameter, and produce concept-level energy estimates. To date, the tool has been used by thousands of professionals nationwide.

architectural drawings

WECC's new office in the works

WECC worked with architects to design our new office as a demonstration building to show how energy efficiency, sustainability, and renewable energy could easily and cost effectively be integrated into an office building.



person wearing suit with green leaf tie

Wisconsin potential study

The Governor's Task Force on Energy Efficiency and Renewables in Wisconsin called on ECW to analyze options for investment in energy efficiency and customer-sited renewable energy. Download the results.



Power Your Design

Advanced Buildings

ECW collaborated with the New Buildings Institute to launch Advanced Buildings – a suite of education and outreach resources driving deep energy savings across the commercial new construction industry nationwide. Key state participants included Massachusetts, Vermont, Oregon, Washington, Wisconsin, New York, and California.

man holding wood chips

Wisconsin Biorefining Development Initiative

ECW launched the Wisconsin Biorefining Development Initiative to help Wisconsin move bio-science to market by introducing new opportunities for refining products from biomass materials and waste streams.

ACEEE award certificate

ACEEE recognition

The American Council for an Energy-Efficient Economy (ACEEE) honored WECC as a Champion of Energy Efficiency.




AIA award

The American Institute of Architects awarded ECW an unprecedented second Award of Excellence in Education, based on the Malcolm Baldrige quality standards.



fall in Wisconsin

Focus on Energy program leadership

WECC became the first statewide administrator of Focus on Energy residential and renewable energy programs in Wisconsin. ECW played a key role in industrial, commercial, and educational program management early in Focus on Energy. WECC eventually led all sectors of Focus on Energy statewide, becoming nationally recognized as a leading energy efficiency innovator and earning Wisconsin recognition by the American Council for an Energy-Efficient Economy (ACEEE) as one of the top states for energy efficiency.


Energy efficiency financing in New York

WECC’s EFS began to originate New York standard and Assisted Home Performance with ENERGY STAR® loans on behalf of New York State Energy Research and Development Authority (NYSERDA). EFS provided the capital for the NYSERDA program, and funded projects which included ancillary health and safety improvements, in addition to the approved energy efficiency upgrades.



drawing of houses

Residential Characterization Study

ECW developed the first and most complete picture of energy use and energy efficiency in Wisconsin housing. This study has been leveraged countless times in program design for the state. Download the results.


Industry of the Future roadmaps

ECW partnered with the U.S. DOE and the most energy intensive manufacturing sectors to develop Wisconsin's Industry of the Future (IoF) roadmaps. IoF roadmaps showed foundries, paper companies, glass and plastics manufacturers, and more how to boost their competitive position through energy efficiency.

drawing of houses

Exemplar Award

The International Association of Continuing Education and Training recognized ECW for excellence in developing training that led to energy behavior change for residential builders and contractors.



residential and new construction

Focus pilots

Both WECC and ECW led pilots that scaled to become Wisconsin Focus on Energy. WECC led the residential sector strategy and programs. ECW played key roles for Wisconsin’s most energy intensive industries and drove efficiency in commercial new construction. ECW also produced all the education programming for the entire Focus on Energy pilot.



Daylighting Collaborative logo

Daylighting Collaborative

ECW created and managed this national market transformation effort that inspired design professionals to create beautiful, naturally-lit buildings, and drive down energy use.


AIA award

The American Institute of Architects awarded ECW the Award of Excellence in Education, based on the Malcolm Baldrige quality standards.



Compressed Air Challenge logo

Compressed Air Challenge

ECW partnered with the U.S. DOE to create the Compressed Air Challenge (CAC), transforming the compressed air manufacturing market through training, publications, software, and more. Third-party studies of CAC outcomes demonstrated over $80 in energy-savings impacts for every dollar invested by sponsors.

conference attendees

Better Buildings: Better Business Conference

ECW launched the Better Buildings: Better Business Conference, North America’s largest educational event for cold-climate residential building professionals.



EFS logo

WECC created Energy Finance Solutions

WECC created EFS to catalyze more energy efficiency projects through financing. EFS became one of the original lenders for the Fannie Mae Energy Improvement Loan program. Visit the EFS website.


Wisconsin code training

In response to a much more stringent commercial and residential building energy code for Wisconsin, ECW led the public/private partnership that trained over 10,000 Wisconsin building professionals how to implement the new code.



New London on a map

WECC pioneered community-based program approaches in New London, Wisconsin

The whole-house, energy-efficiency program inspired behavior change through community-based marketing strategies, incentives, and financing.

ECW logo

Energy Center of Wisconsin established

WCDSR merged with sister-organization Wisconsin Demand-Side Demonstrations to become the Energy Center of Wisconsin (ECW). ECW offered a broader range of energy efficiency services and increased interaction with private industry and the public.

KEEP logo

K-12 Energy Efficiency Program

ECW co-founded KEEP, driving energy literacy in Wisconsin's K-12 faculty and students. KEEP broke new ground by partnering educators and energy professionals.



Wisconsin landscape

Statewide Technical and Economic Potential Study

WCDSR estimated potential savings from energy efficiency measures in Wisconsin over a 20-year period in the agricultural, commercial, industrial, and residential sectors. Download the report.



adding machine

Appliance sales tracking

WCDSR began tracking appliance sales after researching the kinds of appliances and lighting Wisconsin residents purchase and how these purchases compare over time. WCDSR tracked appliance sales for decades, providing critical market intelligence to utilities and later to Focus on Energy to inform program approaches.



1990s computer


WCDSR developed the Wisconsin Demand-Side Options Database which pioneered online access to more than 220 DSM technologies.



WCDSR mission

WCDSR established

Wisconsin utilities, regulators, educators, and community-based leaders created the Wisconsin Center for Demand-Side Research (WCDSR) to accelerate energy efficiency knowledge in Wisconsin through statewide research across utility service territories.



Iowa map

Program offerings in Iowa

WECC expanded its leadership in the low-income sector to Iowa.



original WECC logo

WECC established

Wisconsin Energy Conservation Corporation (WECC) was founded to bring the benefits of energy efficiency to underserved populations. WECC partnered with the Department of Labor on a two-year, four-million-dollar effort to develop a model of employment, training, educational services, and career opportunities for unemployed people and disadvantaged youth. The program brought the first energy conservation services to low-income residents in Wisconsin.