I live in a rural area.
A problem occured when my UPS could not run my computer simply because of voltage fluctuations. I have tried many stabilizers but its too rapid that it would make a tick and the UPS would switch to battery then on line after some time it would run out of juice and just decide to shut off.
I now have many stabilizers but none worked. the last fix I can think of is the cap/ throttle the outlet voltage to 100-110 depending the minimum its fluctuating from so the stabilizer won't tick and the UPS neither hence running all day long.
TL;DR: How to Cap / throttle the output voltage a wall outlet to stop stablizer from making a tick, hence running the UPS on line. ANY way even bringing an electrician and do what's described in the answer.