The cross section of the scattering of solar neutrinos on electrons is sens
itive to the neutrino dipole moments through an interference of electromagn
etic and weak amplitudes. We show how future solar neutrino experiments wit
h good angular resolution and low energy threshold, such as Hellaz, can be
sensitive to the resulting azimuthal asymmetries in event number, and could
therefore provide valuable information on the CP properties and the nature
of the neutrinos, provided the solar magnetic field direction is fixed.