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A desire to shift from fossil fuels to non-carbon-emitting energy sources has become an imperative supported by national, state, and local policies. In the U.S., a diverse array of policies at multiple levels of government have helped the solar industry achieve exponential growth. These advancements, however, are mediated by local implementation processes, which might be expected to have a large impact in the context of U.S. federalism. This paper investigates the effects of two countervailing forces – policy incentives and implementation disincentives – on residential solar adoption in New Jersey. The New Jersey case study includes two complementary analyses designed to illuminate policy incentives and implementation disincentives, respectively. The first is an interrupted time-series analysis that evaluates the effects of federal and statewide renewable energy policies on residential photovoltaic (PV) growth. The second is a set of semi-structured in-depth interviews with solar industry experts, providing implementation insights from the solar industry and indirectly portraying residential customers' experiences. Results confirm that market-based instruments at the state-level play a crucial role in increasing the relative financial advantage of these systems and, thus, the attraction of residential solar PV to adopters. In addition, the behaviours of future adopters and the valuation of this technology as an investment in the housing market will impact the spread of residential PV systems in the future. Unfortunately, case study findings also confirm that an absence of standardized solar application procedures and outdated interconnection standards is a significant drag on the adoption rate. This highlights a need for policymakers to place greater emphasis on local implementation pathways in solar policy design. Options to achieve this include more robust ex-ante coordination among state and local levels of government and with industry to standardize implementation processes. While U.S. federalism may at times be constraining, our results suggest that even minimal levels of ex-ante coordination can lead to implementation gains that will have a large impact on solar diffusion outcomes. Federal and state-level financial incentives significantly impact the residential photovoltaic solar adoption rate. The absence of streamlined interconnection application procedures and outdated interconnection standards for the grid limit the residential PV adoption in New Jersey. Our findings underline the importance of paying equal attention to both policy design and to technical standards to underpin implementation processes, especially in the decentralized context of U.S. federalism. [ABSTRACT FROM AUTHOR]

Problem, research strategy, and findings:Increased demand for urban living, financial incentives for redevelopment, and conducive planning regulations are leading to significant commercial building reuse. This trend represents an opportunity to upgrade the energy performance of the existing building stock in older, more walkable downtowns and to achieve preservation goals. Some advocates of building reuse resist imposing the cost of energy improvements on associated projects, while many energy efficiency advocates do not distinguish how the opportunities and constraints differ between new and existing buildings. Building code officials experience this tension when reviewing improvements to existing buildings, and many find that sections of the widely adopted International Energy Conservation Code are pragmatically unenforceable. In this study we examine the existing-building energy challenge using a mixed-methods approach within one region as well as a national-level analysis of governmental data. We characterize promising regulatory strategies including exempting historic buildings (which is the status quo), exempting smaller buildings and less energy-intensive occupancies and systems, and creating simple lookup tables that provide succinct guidance to redevelopers and code officials. Takeaway for practice:Code officials enforce longstanding life-safety codes more assiduously than they do the newer energy codes, and these codes need revisions to make them more cost effective and enforceable. A better understanding and implementation of building energy codes can have positive implications for both energy performance and downtown revitalization. Success depends on better managing interdependencies among the national policy objective of energy efficiency, the ubiquitous local planning objective of downtown revitalization, and the bureaucratic challenges of regulating construction in existing buildings. Planners should bring code officials into adaptive reuse projects early. [ABSTRACT FROM PUBLISHER]