ANSI C84.1-2020 Standarrds for Electric Power Systems And Equipment allows two standard levels of service, Range A being the normally acceptable 5% loss at your service, and 10% percent voltage loss at point of use, and Range B allowable voltage loss of 8.3% at your service and 13.3% percent voltage loss allowance at point of use to deliver acceptable performance.

Your single family residence should be served by a 120v/240v service, calculating a minimum service voltage of 220v and a minimum point of utilization of 208v.

Voltages at the service are utility responsibility, and if acceptable at the service the utilization is your responsibility. the 114v you have is right at the bottom of acceptable, it is unlikely you would get any satisfactory response from your utility unless you can demonstrate times of day that unacceptable levels frequently occur.

ANSI C84.1-2020 American National Standard for Electric Power Systems and Equipment allows two standard levels of service, Range A being the normally acceptable 5% loss at your service, and 10% percent voltage loss at point of use, and Range B allowable voltage loss of 8.3% at your service and 13.3% percent voltage loss allowance at point of use to deliver acceptable performance.

Your single family residence should be served by a 120v/240v service, calculating a minimum service voltage of 220v and a minimum point of utilization of 208v.

Voltages at the service are utility responsibility, and if acceptable at the service the utilization is your responsibility. the 114v you have is right at the bottom of Range A, it is unlikely you would get any satisfactory response from your utility unless you can demonstrate times of day that unacceptable levels frequently occur.