Rabbani, if I were you I would give the local power company a ring, and have them investigate your problem. 210V is below the UK and Australia mains voltage tolerance standard of +10%/-6% of 230V (253V-216.2V).
Is the daytime low always 210V year round? During the warmer months of the year, when more air conditioners are in use, it is not uncommon for voltage to fall a little below minimum tolerance due to the increased load on the system. The utility companies will also deliberately lower the voltage to reduce strain on the power grid, and prevent blackouts.
Glen
Is the daytime low always 210V year round? During the warmer months of the year, when more air conditioners are in use, it is not uncommon for voltage to fall a little below minimum tolerance due to the increased load on the system. The utility companies will also deliberately lower the voltage to reduce strain on the power grid, and prevent blackouts.
Glen