The paper discusses the use of solar neutrinos to probe new physics through elastic neutrino-electron scattering (EνES) in dark matter direct detection experiments. The authors analyze data from the XENONnT, LUX-ZEPLIN, and PandaX-4T experiments to derive constraints on several $U(1)'$ extensions of the Standard Model, which introduce new neutrino-electron interactions. These models include the anomaly-free $B-L$ model, lepton flavor-dependent interactions like $L_{\alpha}-L_{\beta}$, $B-2L_{e}-L_{\mu/\tau}$, $B-3L_{\alpha}$, and $B+2L_{\mu}+2L_{\tau}$. The paper provides bounds on the coupling and mass of light vector mediators for these models and compares them with other limits from terrestrial and astrophysical experiments. The authors also present forecasts for future experiments like DARWIN, which are expected to improve current bounds significantly, especially in the low-mass regime. The results highlight the potential of dark matter direct detection experiments to probe new physics beyond the Standard Model.The paper discusses the use of solar neutrinos to probe new physics through elastic neutrino-electron scattering (EνES) in dark matter direct detection experiments. The authors analyze data from the XENONnT, LUX-ZEPLIN, and PandaX-4T experiments to derive constraints on several $U(1)'$ extensions of the Standard Model, which introduce new neutrino-electron interactions. These models include the anomaly-free $B-L$ model, lepton flavor-dependent interactions like $L_{\alpha}-L_{\beta}$, $B-2L_{e}-L_{\mu/\tau}$, $B-3L_{\alpha}$, and $B+2L_{\mu}+2L_{\tau}$. The paper provides bounds on the coupling and mass of light vector mediators for these models and compares them with other limits from terrestrial and astrophysical experiments. The authors also present forecasts for future experiments like DARWIN, which are expected to improve current bounds significantly, especially in the low-mass regime. The results highlight the potential of dark matter direct detection experiments to probe new physics beyond the Standard Model.