Based upon the extended theory of planned behavior, an empirical investigation exonerates the green product purchase intentions and behavior of Pakistan consumers while considering the aspect of sustainability regarding solar instalments. Thus, this study examines the Green Product Purchase Behavior outcomes (attitude, subjective norms and perceived behavioral control) in adopting Green Products which the case is the adoption of solar panels. For this research data were compiled from 390 respondents who were taken through a structured questionnaire survey and found to be factors that influence green product purchase intention. Attitudes are shown to have strong positive relationship with green purchase intention, which clearly indicates the important role of favorable attitudes towards ecofriendly products. Although a moderate but still significant effect of subjective norms suggests the importance of social influences on sustainable consumer decisions, the latter was moderate. In addition, the impact of perceived control in performing green behaviours; the green purchase intention, was found to be significantly impacted. These findings are important for enterprises, policymakers and marketers supporting sustainable consumption in Pakistan too.