This study evaluates the techno-economic and environmental performance of solar-powered liquid direct air capture (L-DAC) compared to conventional L-DAC. The research focuses on the impact of location and plant capacity on capture costs and environmental outcomes. The study proposes a solar-powered L-DAC system that uses solar thermal energy for calcination, which is more environmentally friendly and cost-effective than conventional L-DAC. The solar-powered L-DAC system is designed to operate in arid regions where solar thermal energy is available, but it faces challenges due to the intermittent nature of solar irradiance and the need for high-temperature calcination. The study develops a model to assess the influence of location and plant capacity on capture costs and environmental impact. The results show that solar-powered L-DAC is more cost-effective and environmentally friendly than conventional L-DAC. The study also highlights the importance of considering environmental conditions when selecting a site for a solar-powered L-DAC plant. The study concludes that solar thermal energy is a promising alternative for decarbonizing L-DAC, which remains its biggest challenge when competing with other DAC technologies. The study also finds that the levelized cost of produced CO₂ (LCOP) is lower for solar-powered L-DAC than for conventional L-DAC, but the levelized cost of removed CO₂ (LCOD) is higher due to the associated emissions. The study also finds that the LCOD is significantly lower for solar-powered L-DAC when powered with low-cost energy. The study concludes that solar thermal energy is a promising alternative for decarbonizing L-DAC, which remains its biggest challenge when competing with other DAC technologies.This study evaluates the techno-economic and environmental performance of solar-powered liquid direct air capture (L-DAC) compared to conventional L-DAC. The research focuses on the impact of location and plant capacity on capture costs and environmental outcomes. The study proposes a solar-powered L-DAC system that uses solar thermal energy for calcination, which is more environmentally friendly and cost-effective than conventional L-DAC. The solar-powered L-DAC system is designed to operate in arid regions where solar thermal energy is available, but it faces challenges due to the intermittent nature of solar irradiance and the need for high-temperature calcination. The study develops a model to assess the influence of location and plant capacity on capture costs and environmental impact. The results show that solar-powered L-DAC is more cost-effective and environmentally friendly than conventional L-DAC. The study also highlights the importance of considering environmental conditions when selecting a site for a solar-powered L-DAC plant. The study concludes that solar thermal energy is a promising alternative for decarbonizing L-DAC, which remains its biggest challenge when competing with other DAC technologies. The study also finds that the levelized cost of produced CO₂ (LCOP) is lower for solar-powered L-DAC than for conventional L-DAC, but the levelized cost of removed CO₂ (LCOD) is higher due to the associated emissions. The study also finds that the LCOD is significantly lower for solar-powered L-DAC when powered with low-cost energy. The study concludes that solar thermal energy is a promising alternative for decarbonizing L-DAC, which remains its biggest challenge when competing with other DAC technologies.