1. Introduction
Global warming is a pressing concern that garners attention from nations worldwide, with this issue intensifying in recent years primarily due to human activities. If substantial efforts to reduce greenhouse gas (GHG) emissions are not mobilized in the coming decades, the impacts of climate change are projected to escalate gradually and become increasingly severe [
1]. In light of this predicament, one of the pivotal measures to confront this challenge is the adoption of smart grids. Smart grids are designed to facilitate the efficient utilization of renewable energy sources [
2]. The grid update aims to harmonize the demands and resources of all stakeholders, including providers, operators, end users, and others, in the electrical energy market [
3]. The smart grid is built upon digital resources and information technology, enabling a two-way exchange of information between the energy provider and consumers. Moreover, smart energy grids allow for comprehensive monitoring, analysis, control, and communication across the energy system [
4].
The literature underscores that innovations within the energy sector, including those integrated into smart grids, require social acceptance to succeed [
5,
6]. In simpler terms, stakeholders, such as the general public and consumers, must be open to using these technologies or acknowledging their utilization by others [
4]. Despite the significance of taking residential customer acceptance into account, various initiatives aimed at implementing smart meters have encountered issues concerning their acceptance by residential consumers [
7,
8,
9]. Therefore, proposing an acceptance model for residential smart meters is paramount to improving implementation processes to enhance acceptance among householders and, consequently, move towards the development of the present energy system to smart grids. Over the past decade, numerous studies have delved into the factors influencing households’ acceptance of smart meters, e.g., [
10,
11,
12,
13]. Despite this, several smart meter implementation initiatives continue to assume the universal acceptance of smart meters by consumers, even though such assumptions face widespread rejection in the literature, e.g., [
12,
13,
14,
15,
16].
Like numerous other countries, Brazil is steadily gearing up for an extensive smart meter implementation program, which involves replacing 64 million meters with an investment of 91 billion reais by 2030 [
17]. Despite a growing body of literature on smart meter acceptance, a notable gap exists in understanding the factors influencing this acceptance within South America, including Brazil. A comprehensive review of existing research findings, encompassing literature reviews [
18,
19,
20,
21,
22,
23,
24] and smart meter acceptance studies conducted in over 40 locations [
25], confirms this scarcity of research within the South American context.
Brazil’s population has already surpassed 213.3 million [
26]. Against the backdrop of this population growth, the Brazilian government is keen on modernizing its energy grid for several compelling reasons, such as the increasing share of renewable energy sources in its energy matrix [
27], the implementation of variable energy tariffs, comprehended locally as the white tariff [
28], the increase in the number of consumers that are producing their own energy, also named of “prosumers” [
29], and the decrease of non-technical energy losses [
29,
30]. With these foundational principles in mind, the Brazilian government actively promotes public policies and investments in smart meter adoption, thereby replacing conventional electricity meters with smart meters [
31]. Despite the national plan for updating the electrical system, the replacement of traditional meters by smart meters is decentralized and carried out by the various energy utilities. This complexity occurs due to the inherent diversity and complexity of the Brazilian electrical system, which encompasses a variety of entities, ranging from private companies to public–private partnerships and fully public concessionaires. Though implementing smart meters offers numerous benefits to energy utilities, including improved data accuracy, the elimination of manual reading, and the potential to introduce various customer-centric services, the cost of replacing traditional meters with smart ones is paid for by residential consumers, as per the National Electric Energy Agency (ANEEL) [
31]. Nevertheless, energy utilities have undertaken several pilot projects for smart meter implementation. Nevertheless, transitioning from pilot projects to widespread smart meter adoption necessitates a deeper examination of user needs and perspectives [
8]. Consequently, understanding the factors that influence the acceptance of smart meters by the population is instrumental in shaping more effective public policy implementation. Furthermore, this knowledge helps to mitigate the delays and setbacks frequently encountered during the implementation process [
32], which often arise from the oversight of consumer perspectives in the transition to smart grids, as noted in the literature, e.g., [
12,
13,
14].
In light of this context, two fundamental inquiries guided this research. Firstly, what are the factors of smart meter acceptance? Secondly, how do these factors impact the acceptance of smart meters? Within this framework, the primary objective of this research is to assess the factors influencing the acceptance of residential smart meters in a specific city in the south of Brazil, specifically in the city of Joinville. Joinville is the largest urban center and industrial epicenter in Santa Catarina state [
33]. It was selected as the focal point of this study due to its pivotal role in the Brazilian economic landscape, being the third wealthiest city in the southern region of the country [
33]. Moreover, focusing the research on a single region ensures a more dependable and representative sample within the designated population [
34]. The article’s results unveil critical insights for the formulation of public policies concerning the deployment of smart residential meters in the study area. Additionally, the findings aim to furnish valuable evidence regarding consumer behavior in the installation of smart meters in the southern region of Brazil.
4. Discussion
Performance Expectancy (PE) refers to how an individual believes using a particular technology will help them perform better at a given task or job [
36]. In the case of smart meters, feedback provided to consumers is considered a critical factor in smart meter adoption [
42,
62] because it helps users achieve goals, such as reducing their daily energy consumption [
63]. The relationship between PE and IU (β = 0.497;
p-value < 0.001) was significant and the strongest of the seven constructs in the model. This result is consistent rk with the literature and previous studies on smart meter adoption in Republic of Korea and the USA [
42,
64,
65].
Hedonic Motivation (HM) refers to the enjoyment and satisfaction that using a new technology provides rather than its functional benefits [
35]. HM could influence the Intention to Use (IU) smart meters, reflecting an individual’s desire to use the device. As with Performance Expectancy (PE), the relationship between HM and IU is also significant in Joinville (β = 0.230;
p-value < 0.001). However, the relationship is notably weaker than what has been reported in examinations conducted in Republic of Korea (β = 0.630) [
11], Vietnam (β = 0.435) [
11], and Indonesia (β = 0.505) [
62]. Despite this, consumers in Joinville who find smart meters to be enjoyable to use will be more likely to accept them. Although there are few studies on this relationship, those suggest a positive effect of HM on IU, mainly when gamification interfaces are applied, e.g., [
66,
67]. Fensel et al. [
66] also suggest that designing a user-friendly and intuitive platform to monitor and control energy consumption is paramount for improving the acceptance of smart meters. Given the limited number of studies on this relationship, further research is needed to investigate the effect of HM on the acceptance of smart meters.
Social influence (SI) refers to the degree to which an individual is susceptible to using a new technology because of the influence of other people or organizations that they consider essential [
36]. Although this factor has already been frequently tested in the literature, it has become more critical due to the increasing use of social media [
68]. SI was significantly related to IU (β = 0.195;
p-value < 0.05) for the Joinville, SC sample. The estimated value is similar to those obtained by Warkentin et al. [
38] (β = 0.208;
p-value < 0.001) in the USA and Guerreiro et al. [
9] (β = 0.108;
p-value < 0.05) in Évora, Portugal. SI may be more important in Brazil because, according to a 2021 report by Hootsuite and WeAreSocial, Brazil is the third most active country on social media in the world, with users aged 13 or older spending an average of 3 h and 42 min per day on social media. This is more than in any other country except Colombia and the Philippines. Furthermore, 82.2 percent of Brazilians aged 13 or older are active social media users, compared to a global average of 53.3 percent [
69]. The COVID-19 pandemic has accelerated the digital inclusion of older adults, who are now using smartphones and social media more to stay in touch with friends and family and to search for information and products that they are interested in [
70]. This indicates that SI is becoming increasingly crucial for the acceptance of smart meters by the general population, not just younger individuals. Therefore, one strategy to boost the acceptance of smart meters is to use digital media as an ally, both through social networks and e-commerce, investing in the creation of content and dissemination on the topic.
Environmental Awareness (EA) is the degree to which people are concerned and aware of environmental changes and the problem of global warming [
41]. Although not part of the traditional UTAUT2 model, EA is recommended for inclusion in acceptance models for new sustainable energy technologies, such as smart meters [
4,
42]. In this study, EA did not have a significant effect on UI (β = 0.047;
p-value = 0.482). This result contradicts previous research on smart meter acceptance in Malaysia [
4,
40,
42] and the USA [
4,
42]. Chen et al. [
42] and Bugden and Stedman [
4] note that a limitation of their studies is that they assume a positive relationship between EA and smart meter acceptance. For example, Chen et al. [
43] report that 39.9% of their sample participants were liberal-leaning Democrats, who are more likely to have pro-environmental attitudes. Similarly, Bugden and Stedman [
4] found that a large portion of their sample was from wealthier segments of the North American population, who are generally more favorable towards the environment and the benefits of smart meters. The Joinville sample also has higher purchasing power than the average population. However, the results suggest that the environmental factor is not yet decisive for smart meter acceptance. The non-significant EA may indicate that the estimated model lacks a better fit, perhaps requiring more variables or the moderation of socio-demographic factors to explain this factor.
Effort Expectancy (EE) encompasses concepts such as familiarity and perceived ease of use. It is defined as the individual’s perceived difficulty or ease in learning to use a specific technology [
36]. Interestingly, in the present study, EE had no significant effect on Intention to Use (IU) (β = 0.008;
p-value = 0.910), unlike all previous studies on smart meter acceptance, e.g., [
4,
9,
40,
65]. This result is contradictory, as EE comprises factors, such as ease of use and familiarity, which are recurrent in the literature as influencers of smart meter acceptance [
19,
59,
71]. People who know little about this technology tend to judge it as complex [
19]. Conversely, the easier a new technology seems to be to use, the greater its acceptance [
58,
65]. Again, the fact that the sample in this study had a higher income than the population average suggests they likely have access to many other smart devices. This greater familiarity with smart devices may increase familiarity with smart meters, making the relationship between EE and UI non-significant. Despite this, the result reinforces the need to test moderation with demographic variables for this relationship.
Violation of Privacy (VP) represents the degree of concern about ensuring the privacy and security of consumer data [
58]. Like Environmental Awareness (EA), despite not being part of the traditional UTAUT2 model, these constructs should be incorporated into smart meter acceptance models [
4,
42]. Similar to Effort Expectancy (EE), the effect of VP on Intention to Use (IU) was not significant (β = 0.011;
p-value = 0.869), which is opposite to the results of studies conducted in Malaysia [
40] and the USA [
4,
42]. The issue of privacy violation is considered relevant in the digital world despite a lack of consensus in the literature on its effect on the intention to use residential smart meters. Recent studies provide evidence that concerns about hacker invasion, and the leakage and distribution of personal data are significant factors in the Intention to Use smart meters, e.g., [
38,
40,
42,
62]. However, other studies have not found significant results in this relationship, e.g., [
72]. For example, Wunderlich et al. [
72] reported that smart meter technology is still in its early stages in Germany, which suggests that people may evaluate privacy violations as less important than the potential benefits that this new technology can offer. The specific situation in Joinville and other Brazilian cities, where physical violence and property crime are high, may also contribute to survey respondents being less concerned about privacy and data protection. The non-significance of the relationship between VP and IU associated with the target sample/population reinforces the need to test moderation with demographic variables for this relationship.
Finally, of the other constructs analyzed, only Associated Costs (ACs) were not validated, as they did not achieve satisfactory results in the Measurement Model, and it was removed from the estimated model. Although AC is not originally incorporated into UTAUT2, it is a relevant factor for smart meter acceptance, as it is defined as the personal financial and social costs (subsidies) required to make the initial investment effective [
41]. However, as Gumz et al. [
58] have noted, validation problems related to the AC construct are common when estimating smart meter acceptance. This suggests that more consistent items should be included to enable the estimation of this relationship in future research.
5. Conclusions
This article assessed the factors influencing the acceptance of residential smart meters in Joinville, a city in the south of Brazil. The PLS-SEM model was estimated using 136 responses from the population. Focusing on a particular city provides more reliable estimations by eliminating specific factors that could affect the results.
This article provides several managerial implications for the more efficient implementation of smart meters in Brazil, particularly in the city of Joinville. Although the sample is limited to one city, the cultural and climate similarity between other cities in southern Brazil suggests that these results can be generalized to a much wider region. Performance Expectancy, Hedonic Motivation, and Social Influence were found to have a significant impact on the acceptance of smart meters by the study population. Developing public policies and communication strategies focused on these factors is essential to reduce potential consumer resistance, as seen in several other smart meter implementation projects. Moreover, the results contribute to the smart grid implementation, which depends entirely on the smart meter.
Among the theoretical contributions of this study is the limited amount of research on smart meter acceptance in South American populations. Furthermore, some of the estimated relationships suggest new directions for future research, such as the non-significance of the relationships between Violation of Privacy (VP) and Associated Costs (ACs) constructs and the Intention to Use (IU) construct. The higher level of violence in Brazil may reduce the perceived risk of personal data exposure, unlike what is seen in populations with higher levels of security, such as in the United States, e.g., [
4,
42]. Understanding the factors contributing to lower perceptions of privacy-related problems in Brazil can enable the development of solutions to facilitate the use of consumption data from smart meters.
The study’s findings are derived from a specific sample, and the generalizability of these results to the broader population may be limited. The study’s limitations acknowledge the potential for biases arising from the sampling procedure and the need for further research to assess the predictive accuracy of the proposed model.