Our mains power line keeps fluctuating on us, especially during peak activity in the afternoon. Lights flicker and monitors turn on and off (even if we disconnect major loads like refrigerators), which would be damaging to their inside components, and annoying for when your in a meeting or doing something .
After recently getting a Cyberpower UT100EG UPS with built in AVR to help with this (couldnt get the pure sine wave stuff though, that stuffs expensive af), while the PC and monitor with built in adapter (the ones that only need AC cords) seems to work as it used to (no flicker or anything), our Acer LED monitor that uses a 12 AC to DC adapter with barrel jack keeps flickering even after connecting to the UPS (it was the only one flickering before).
This same flicker happens even if I swap the DC adapters with similar ones which rules out the adapter to be faulty. Is there any chance that recapping (or stepping up the uf capacity of the capacitors from like 1kuf to 1.2kuf) the original wall adapter might give the monitor more time to work when the relay switches from AC to DC, fixing the turning on an off issue?
The wall adapter two filtering caps on the DC side, one 1000uf 16V and one 680uf 16V, after replacing them with the same capacitance but rated for much higher voltages and of nichicon brand (1000uf 35V, 680uf 35V), the monitor flickers less but still does. After doing some research on the UPS itself, it comes with GreenPower tech that is built to minimize energy consumption. Their website (https://www.cyberpowersystems.com/feature_focus/greenpower-ups-technology/) says that one of its greenpower features is as followed
"Bypass Design: Our patented bypass design allows current to bypass the transformer and automatic voltage regulation (AVR) when utility power is normal, thus reducing energy consumption and associated costs. Because utility power functions normally most of the time, the bypass design allows for substantial energy savings. This technology also reduces heat generation, an important factor in decreasing operating costs."
After researching other UPS, it seems APC (Schneider) also comes with similar tech called Greenmode which could not be bypassed in older models. One eev post lists a possible workaround in greater detail (https://www.eevblog.com/forum/repair/how-to-disable-green-mode-on-apc-smart-ups-smt-series/).
My question is, is their any way to fix the issue either through upgrading the wall adapters DC capacitors (1200uf 35V and 700uf 35V or even higher). If this is simply not feasible and would damage the monitor, any UPS recommendations for 600W PC + 2 monitors? Preferably withing the same price range as the cyberpower one, that completely bypasses any Greentech/ Greenmode, leaving the transformer and AVR always on?