A structural equation model of factors influencing intention to use solar rooftop energy of households in Thailand

Name: Pongsapat Theppratuangthip

LCSH: Solar energy -- Thailand

LCSH: Solar houses -- Thailand

ThaSH: พลังงานแสงอาทิตย์ -- ไทย

ThaSH: บ้านพลังงานแสงอาทิตย์ -- ไทย

Abstract: This research aimed to 1) develop a model of the government policy, attitude, the subjective norm, and perceived usefulness influencing the intention to use solar rooftop energy of households in Thailand; 2) to examine the model fit of the government policy, attitude, the subjective norm, and perceived usefulness influencing the intention to use solar rooftop energy of households in Thailand, and 3) to study the direct effect, indirect effect, and total effect of the variables on the intention to use solar rooftop energy of households in Thailand. Mixed methods were used, i.e., quantitative research and qualitative research. For the quantitative research, the online and hardcopy questionnaires were used as the instrument for collecting the data. The samples comprised 320 homeowner and household members in residence in a type of detached houses, townhouses, duplexes, townhomes, row houses, or shop houses which has the roof space exposed to sunlight. Then, the data was analyzed by percentage, mean, standard deviation (SD), skewness, kurtosis, Confirmatory Factor Analysis (CFA), and analysis of the casual relationship. The obtained analysis results were conducted further in the form of qualitative research with an in-depth interview with the experts, executives, users, and senior officers from related energy authorities involved in solar rooftop energy. For the general data of the respondents, 174 or a little over half of the total number of participants were female (54.38%). The highest number of respondents were aged between 31-40 years (89; 27.81%). About half of the total number of respondents had graduated with a bachelor’s degree (139; 43.44%). A little over half of the total number of respondents were corporate employees (174; 54.38%). About one third of the total number of respondents received a monthly income less than 35,000 Baht (127; 39.69%). Most of the respondents lived in detached houses (235; 73.44%). At least half of the total number of respondents were house members (162; 50.63%). A little over half of the total number of respondents lived in houses aged more than 10 years (184; 57.50%). Nearly half of the total number of respondents paid a monthly electricity cost between 1,001-3,000 Baht (142; 44.38%). According to the survey by the assessment of the general knowledge on a solar rooftop, it was found that 54 respondents or 16.88% replied the correct 4 questions out of 10 questions. Moreover, the level of their overall self-knowledge assessment about a solar rooftop was still quite low (x̄ = 2.77; SD = 1.512). According to the analysis results of the level of the factors, it was found that attitude had the highest mean (x̄ =5.28), followed by perceived usefulness (x̄ = 5.18), the subjective norm (x̄ = 4.18), intention to use (x̄ = 4.05), and the government policy (x̄ = 3.16). According to the CFA results, it was found that the scale had convergent validity with significant standard regression weights in all variables. Then, the Structural Equation Model (SEM) was analyzed and the model fit was examined. The results found that the (X²) = 80.705, df = 6 3, CMIN/DF (X²/df) = 1.302, p = .055, GFI = 0.960, CFI = 0.994, AGFI = 0.922, NFI = 0.975, and RMSEA = 0.035. It was found that the intention to use was positively and significantly affected by attitude, perceived usefulness, subjective norm, and government policy. The variance of the intention to use could be explained as 61% (R²= 0.61). The remainder was affected by other factors. In addition, the study shows that the intention to use is indirectly influenced by subjective norm statistically significant. The intention to use is also indirectly influenced by perceived usefulness statistically significant. Both of these factors increase an indirect effect to intention to use solar rooftop. This was congruent with the in-depth interview results, which agreed that the attitude, perceived usefulness, subjective norm, and government policy were the key factors of users’ confidence. When consumers perceived the rules, regulations and obtained values, this would affect the positive attitude toward the use and intention to use a solar rooftop.

King Mongkut's Institute of Technology Ladkrabang. Central Library

Address: BANGKOK

Email: Lifelong@kmitl.ac.th

Name: Nuttawut Rojniriruttikul

Role: Thesis Advisor

Created: 2020

Modified: 2564-07-29

Issued: 2021-07-29

วิทยานิพนธ์/Thesis

application/pdf

eng

DegreeName: Doctor of philosophy

Level: Doctoral Degree

Descipline: Industrial Business Administration

Grantor: King Mongkut's Institute of Technology Ladkrabang

©copyrights King Mongkut's Institute of Technology Ladkrabang

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1	Fulltext Pongsapat Theppratuangthip.pdf	3.89 MB	7	2025-03-30 22:28:27

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