Case Studies

  • Strateg.planning.decarbonized.future
    Strategic Planning for a Decarbonized Future

    Case Studies

    ILLUME assists clients by offering strategic planning support to identify research, program designs, and technologies that align with utility and policy…

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  • Whitepaper.mockup.designs intersection
    The Intersection of Food Deserts and Energy Efficiency

    Case Studies

    The ILLUME team led a research study to support the launch of SoCalREN’s new Food Desert Energy Efficiency Equity (FDEEE) program.

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  • Hpwh.adoption
    Addressing Challenges in Heat Pump Water Heater Adoption

    Case Studies

    ILLUME conducted an ethnographic research study to explore the magnitude of installation challenges for heat pump water heaters (HPWHs) in cold-climate…

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  • Heat.pump.and.integrated.controls
    Heat Pump and Integrated Controls Performance Review

    Case Studies

    Heat pumps are on the rise in the Northeast, with Massachusetts offering incentives for electrifying home heating and reducing reliance on…

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  • Whitepaper.mockup.designs dynamic pricing
    Shifts in Energy Use Through Time-Varying & Dynamic Pricing Rates

    Case Studies

    Rolling out dynamic pricing (or real-time pricing) rates is a challenge, but new rate designs will be increasingly necessary to address…

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  • Square.peg.round.hole
    A Square Peg and a Round Hole: Advancing Affordability, Access, and Resiliency

    Case Studies

    Many states, agencies, and utilities are entrusted with translating policies and goals into actionable strategies. In this case study, ILLUME shares…

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  • Inclusive.energy.codes
    Driving the All-Electric Home Construction Market Forward

    Case Studies

    In order to help federal, state, and local action plans reach their decarbonization goals, ILLUME looked into ways to promote the…

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  • Driving.the.all.electric.home.construction (1)
    How Market Actors Can Spur All-Electric New Home Construction

    Case Studies

    ILLUME investigated the market actors that have the power to influence electrifying the residential sector to better understand the barriers that…

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  • Eliminating energy program participation barriers
    Eliminating Energy Program Participation Barriers

    Case Studies

    An ILLUME study reveals that homeowners are nearly 20% more likely than renters to be aware of their utility’s energy efficiency…

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  • New.york.leans.into.equity.focused
    New York Leans Into Community-Focused Climate Goals

    Case Studies

    Disadvantaged communities face numerous barriers when accessing clean energy and climate adaptation services. To overcome these barriers, NYSERDA enlisted ILLUME to…

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  • Oracle case study banner
    Testing the Efficacy of Home Energy Reports

    Case Studies

    Drawing on statistical methods from biomedical research, ILLUME applied meta-analysis techniques to measure savings from home energy report (HER) programs to…

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  • Connecting With Communities 4 3
    Connecting with Communities

    Case Studies

    Expanding engagement to create more inclusive programs. With a novel and engaging research approach, ILLUME identified strategies for an electric utility…

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  • Screenshot 2025 04 03 161422
    Understanding Customer Motivations to Reshape Solar Programs

    Case Studies

    In 2021, ILLUME conducted research to help a southeastern utility understand customers’ experiences with under-subscribed solar offers and to understand how…

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  • Case Study Holistic Customer Segmentation.v2
    Holistic Customer Segmentation

    Case Studies

    ILLUME was contracted by a regional utility to conduct a customer segmentation study that coupled demographic data with satisfaction and engagement…

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  • Integrated HVAC
    Integrated HVAC Controls: Learning From Early Adopters

    Case Studies

    To reach our industry’s ambitious carbon reduction goals, technology has to work for the environment and for people. In this case…

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  • Unpacking The Meaning
    Value, Cost, and Price In A Time of Climate Shocks

    Case Studies

    Extreme weather events nearly always result in the same outcome: power failures. When this happens, utilities can activate incident command protocols…

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  • From Energy Efficiency to Demand Impacts:
    From Energy Efficiency to Demand Impacts

    Case Studies

    As the need for demand mitigation increases, how can utilities and program administrators extend energy efficiency portfolios to increase demand impacts?

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  • Hidden Basement 1
    Hidden in the Basement: Learnings From A Demand Response Study

    Case Studies

    In a crowded market of new and more efficient appliances, can heat pump water heaters deliver deeper savings and expanded opportunities…

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  • New Metrics
    New Metrics: Assessing Energy Burden and Bill Impacts

    Case Studies

    Reorienting toward equity, utilities are seeking ways to remedy disparities through income eligible (IE) offerings. Learn how we helped a Midwest utility…

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  • Mass
    Understanding Our Underserved Majority

    Case Studies

    What happens when we reject monolithic thinking, and listen to customers’ lived experiences to find out what matters most to them?…

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  • Ev Revving
    Are EV-Supporting Programs Revving the Market?

    Case Studies

    ILLUME led research to evaluate and understand the market impact of National Grid’s EV charging incentive program in 2020.

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  • Barriers Study
    Residential Nonparticipant Market Characterization and Barriers Study

    Case Studies

    ILLUME conducted primary research for the Massachusetts Program Administrators and EEAC to characterize Mass Save residential nonparticipants, investigate barriers to participation,…

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  • Smart Home 4 3
    Bring Your Own Thermostat (BYOT) Pilot Evaluation

    Case Studies

    ILLUME conducted a Bring your Own Thermostat (BYOT) Pilot evaluation for Georgia Power (process, impact) to assess demand impacts and savings…

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  • Thermostat
    Optimizing Thermostat Demand Response Program Performance Paper

    Case Studies

    This paper, co-presented at the 2019 IEPEC conference, explores how weather and program design factors influence DR program participant behavior, particularly…

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