  There is a well known 2$\sigma$ tension in the measurements of the solar
$\Delta m^2$ between KamLAND and SNO/Super-KamioKANDE. Precise determination of
the solar $\Delta m^2$ is especially important in connection with current and
future long baseline CP violation measurements. Reference \cite{Seo:2018rrb}
points out that currently running short baseline reactor neutrino experiments,
Daya Bay and RENO, can also constrain solar $\Delta m^2$ value as demonstrated
by a GLoBES simulation with a limited systematic uncertainty consideration. In
this work, the publicly available data, from Daya Bay (1,958 days) and RENO
(2,200 days) are used to constrain the solar $\Delta m^2$. Verification of our
method through $\Delta m^2_{ee}$ and $\sin^2 \theta_{13}$ measurements is
discussed in Appendix A. Using this verified method, reasonable constraints on
the solar $\Delta m^2$ are obtained using above Daya Bay and RENO data, both
individually and combined. We find that the combined data of Daya Bay and RENO
set an upper limit on the solar $\Delta m^2$ of 18 $\times 10^{-5}$ eV$^2$ at
the 95% C.L., including both systematic and statistical uncertainties. This
constraint is slightly more than twice the KamLAND value. As this combined
result is still statistics limited, even though driven by Daya Bay data, the
constraint will improve with the additional running of this experiment.
