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Exploring the Potential of Factory Installed Solar + Storage for Homebuilding

Cityscape (Washington, D.C.), 2023-01, Vol.25 (1), p.145-162 [Peer Reviewed Journal]

Copyright U.S. Department of Housing & Urban Development 2023 ;ISSN: 1936-007X ;EISSN: 1939-1935

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  • Title:
    Exploring the Potential of Factory Installed Solar + Storage for Homebuilding
  • Author: Nahmens, Isabelina ; Labík, Ondřej ; Donovan, Alison ; Whitehouse, Kalee ; Lane, Damon ; Kirwan, Desmond ; Badger, Leslie ; Podder, Ankur ; Pless, Shanti
  • Subjects: Affordable housing ; Cost control ; Factories ; Lean manufacturing ; Symposium: Housing Technology Projects
  • Is Part Of: Cityscape (Washington, D.C.), 2023-01, Vol.25 (1), p.145-162
  • Description: In recent years, an increasing number of grid disruptions due to intense weather events, natural disasters, and high peak loads resulted in increased interest in energy-resilient homes. Solar + storage (S+S) as an energy resiliency solution can provide continuity, onsite generation, and backup power during critical events. This project explored factory-installed solar plus storage (FISS) to overcome first cost and installation barriers and bring this resiliency solution to scale for single-family affordable and market-rate homebuyers. Guided by the principles of Lean manufacturing, the team explored how factories building high-performance zero energy modular homes can incorporate S+S into their existing construction system while improving quality and productivity and reducing the costs of the resilient energy system. The team identified both potential barriers (for example, first cost, permitting, utility interconnection, finished module transportation, and future battery replacement) and value (such as, resiliency benefits, opportunities for utilities, clean energy equity for affordable housing, and new markets for modular factories) of incorporating S+S into factory-built housing. Through a case study and factory information modeling, the team analyzed the FISS approach, which resulted in about 27 percent potential total cost reduction compared with onsite installation. Using the cost reduction results from the case study, the team evaluated the homeowner economics and duration of backup power using the National Renewable Energy Laboratory’s (NREL) System Advisor Model (SAM) in six locations in the United States. Results showed that in five locations, homeowner net present value (NPV) is positive with long-term, lowinterest financing through a mortgage. The SAM analysis showed in almost all cases, the S+S system could power 25 percent of the electricity needed in a home for 4 days, and under some scenarios, up to 100 percent of the load for 4 days. Findings from this study show S+S is a viable backup power source during grid outages and supports the creation of a high-performance factory to produce resilient homes that can be adopted at scale, with reduced cost by integrating S+S with prefabricated modules guided by lean manufacturing principles.
  • Publisher: Washington: US Department of Housing and Urban Development
  • Language: English
  • Identifier: ISSN: 1936-007X
    EISSN: 1939-1935
  • Source: U.S. Government Documents
    ProQuest Central

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