Adoption of Photovoltaic-Driven Heat Pump Systems in Residential Buildings: A Systematic Review of Economic and Socio-Behavioural Influences

Photovoltaic (PV)-driven heat pump systems offer potential for reducing household energy emissions and improving performance of residential low-carbon energy systems. However, technical feasibility alone does not explain why adoption remains uneven across residential contexts. This study focuses on the economic and socio-behavioural factors that facilitate or hinder the uptake of PV-driven heat pump systems in buildings. The aim is to systematically review literature to understand how lifecycle cost, payback period, electricity price conditions, household affordability, perceived financial risk, comfort expectations, trust in technology, information availability and social influence shape adoption decisions. A qualitative systematic literature review is being conducted using evidence from techno-economic assessment, household decision-making, residential energy behaviour and low-carbon technology adoption studies. PRISMA-based search and selection procedures are used to improve transparency, consistency and traceability in identifying peer-reviewed articles, conference papers, academic reviews, policy documents and institutional reports. Preliminary literature synthesis indicates that economic viability varies with electricity tariffs, PV system configuration, storage, operating conditions and modelling assumptions, with reported payback periods ranging from approximately 7 to 17 years across contexts. Socio-behavioural findings indicate that perceived ability to adopt, social expectations, product knowledge, technological innovativeness, environmental values, risk tolerance and trust can encourage adoption, while upfront costs, uncertainty about energy savings, limited information and perceived financial risk can discourage households. Adoption also differs across income, education, homeownership, age, dwelling size, insulation quality and regional conditions, while neighbourhood effects and complementary policy measures can influence co-adoption pathways. The novelty of this study lies in examining PV-driven heat pump adoption as an integrated household decision rather than treating PV and heat pump technologies separately. Preliminary evidence suggests that financial attractiveness alone is insufficient; successful uptake depends on combining viable economics with trusted information, household capability and policy. These findings can inform financial incentives, installer guidance and household decision support.