  Non-vanishing electromagnetic properties of the neutrinos have been predicted
by many theories beyond the Standard Model, and an enhanced neutrino magnetic
moment can have profound implications for fundamental physics. The XENON1T
experiment recently detected an excess of electron recoil events in the 1-7 keV
energy range, which can be compatible with solar neutrino magnetic moment
interaction at a most probable value of $\mu_{\nu} = 2.1 \times 10^{-11}
\mu_{\text{B}}$. However, tritium backgrounds and solar axion interaction in
this energy window are equally plausible causes. Upcoming multi-tonne noble
liquid detectors will test these scenarios more in depth, but will continue to
face similar ambiguity. We report a unique capability of future large liquid
scintillator detectors to help resolve the potential neutrino magnetic moment
scenario. With a liquid scintillator exposure of $O$(100) kton$\cdot$year, a
sensitivity of $\mu_{\nu} < 10^{-11} \mu_{\text{B}}$ can be reached at an
energy threshold greater than 40 keV, where no tritium or solar axion events
but only neutrino magnetic moment signal is still present.
