Impact of power outages on the adoption of residential solar photovoltaic in a changing climate
By Jiashu Zhu, Wenbin Zhou, Laura Diaz Anadon, Shixiang Zhu
DOI https://doi.org/10.48550/arXiv.2512.05027
Abstract
Residential solar photovoltaic (PV) systems are a cornerstone of residential decarbonization and energy resilience. However, most existing systems are PV-only and cannot provide backup power during grid failures. Here, we present a high-resolution analysis of 377,726 households in Indianapolis, US, quantifying how power outages influence the installation of PV-only systems between 2014 and 2023. Using a two-part econometric panel model, we estimate the causal effect of power outage exposure and project future risks under a middle of the road climate scenario (RCP 4.5). We find that each additional hour of annual outage duration per household lowers the new-installation rate by 0.012 percentage points per year, equivalent to a 31% decline relative to the historical mean(2014-2023). With outage duration and frequency projected to double by 2040,these results reveal a potential vicious cycle between grid unreliability and slower decarbonization, calling for policies that integrate grid resilience and clean-energy goals.Abstract
This study investigates the influence of power outages on the installation of residential solar photovoltaic (PV) systems, which are vital for reducing carbon emissions and enhancing energy resilience. The researchers analyzed data from 377,726 households in Indianapolis, US, from 2014 to 2023. They utilized a specialized econometric panel model to determine how varying lengths of power outages affected the adoption of PV systems. The findings revealed that for each additional hour of outage, the installation rate of new PV systems decreased by 0.012 percentage points annually, translating to a significant 31% reduction compared to the average rate over the study period. With projections indicating that outages may double by 2040, the study calls for policies that address both grid resilience and clean energy initiatives.
1. Introduction
The paper opens by emphasizing the crucial role electricity grids play in connecting renewable energy sources to consumers, particularly as the demand for electricity rises due to increasing electrification. The reliability of these grids is threatened by aging infrastructure and severe weather, leading to significant concerns about energy resilience. Outages are particularly prominent in certain regions, and while studies indicate that developing nations have increased their adoption of off-grid solar systems to counteract outages, developed nations mainly utilize grid-connected solar PV systems guided by financial incentives. Recent changes in policy, especially in the US and Europe, have reduced these incentives, making it harder for homes without battery storage to derive savings from PV systems.
The introduction stresses the growing significance of understanding how outages affect residential energy technologies, as extreme weather events—exacerbated by climate change—are becoming more frequent. The authors argue that insights into these impacts can guide future investments and inform policies promoting decentralized energy resources (DERs).
2. Findings and Results
Research Methodology
The study utilized a high-resolution dataset, analyzing various outage events and installations across households in Indianapolis. They employed a two-part econometric model, estimating the causal effects of outages on PV adoption while using wind speeds as an instrumental variable to account for potential biases.
Key Findings
- Impact of Outage Duration: An increase of one hour in annual outage duration led to a decrease in PV installation rates by approximately 0.012 percentage points, representing a 31% decline relative to the historical average.
- Outage Frequency: The study found that while the length of outages significantly deterred new installations, the frequency of shorter outages had a lesser and inconsistent impact. Prolonged outages triggered more intense negative reactions towards the adoption of solar technologies.
- Time Sensitivity: The adverse effect of outages was most pronounced within the first three months following an outage, indicating a short-term memory effect regarding power disruptions.
- Future Projections: Under mid-level climate change scenarios, both outage duration and frequency could double by 2040, compounding the issues of grid reliability and further impeding the growth of new PV installations.
Visual Data Analysis
Maps displaying the geographical distribution of outages and PV installations highlighted significant disparities across different regions in Indianapolis, showcasing areas severely impacted by outages compared to those with more reliable service.
3. Conclusion and Implications
The research asserted that long-term power outages negatively influence the adoption of PV-only solar systems, reflecting a complex relationship between grid reliability and technological adoption. As climates continue to shift, leading to more extreme weather events, regions become more susceptible to outages. Consequently, the results point toward a vicious cycle: as outages deter PV adoption, the slow uptake of clean energy technologies feeds back into the reliability issues of the grid.
Policy Recommendations
To break this cycle and enhance both the resilience of the grid and the transition to clean energy, the authors emphasized the need for policies that integrate grid improvement and energy goals. Key suggestions included:
- Retaining robust net metering systems to make solar adoption financially attractive.
- Encouraging the installation of battery storage systems to complement PV installations.
- Articulating policies that provide more incentives for household solar energy solutions and facilitate easier installation procedures.
Broader Context
The findings are not only applicable to Indianapolis but may resonate in other urban settings across the US and beyond, particularly within similar utility structures facing extreme weather influences. The research calls upon regulators and energy planners to incorporate outage impact assessments into future energy planning to promote sustainable growth within the energy sector.