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In several extensions of the Standard Model of Particle Physics (SMPP), theneutrinos acquire electromagnetic properties such as the electric millicharge.Theoretical and experimental bounds have been reported in the literature forthis parameter. In this work, we first carried out a statistical analysis byusing data from reactor neutrino experiments, which include elasticneutrino-electron scattering (ENES) processes, in order to obtain bothindividual and combined limits on the neutrino electric millicharge (NEM). Thenwe performed a similar calculation to show a estimate of the sensitivity offuture experiments of reactor neutrinos to the NEM, by involving coherentelastic neutrino-nucleus scattering (CENNS). In the first case, the constraintsachieved from the combination of several experiments are $-1.1\times 10^{-12}e< q_{\nu} < 9.3\times 10^{-13}e$ ($90\%$ C.L.), and in the second scenario weobtained the bounds $-1.8\times 10^{-14}e < q_{\nu} < 1.8\times 10^{-14}e$($90\%$ C.L.). As we will show here, these combined analyses of differentexperimental data can lead to stronger constraints than those based onindividual analysis. Where CENNS interactions would stand out as an importantalternative to improve the current limits on NEM.

Constraints on neutrino electric millicharge from experiments of elastic  neutrino-electron interaction and future experimental proposals involving  coherent elastic neutrino-nucleus scattering