Im worried about the electricity bill. How does the ups consume electricity? Lets say in my case i got a 720 watts ups, does it constantly consume 720 watts or just consumes the tiny amounts to keep it maintained at 720 watts? (After the initial charge)
The 1200VA/720w rating is how much energy the UPS can process through line-power or battery before overloading. How much energy is actually being consumed will depend on the energy demand of every component plugged into the UPS. If you are experiencing overloads, the first step is to calculate the total demand of your PC and Monitor and any anything else plugged into the UPS. This should be done before selecting a UPS.
Other than your PC and Monitor, do you have anything else plugged into the UPS?
3060 Ti: ~200w peak
i5 11400f: ~190w peak (stress)
Generic Gaming Monitor: ~55w
Generic Gaming Motherboard: ~150w peak (stress)
Even with the highest stress values and peak use, your system, using approximations and generic values, is only at 595w. Even when factoring in RAM, AIO, and etc... a 720w UPS should be enough.
Are you certain that the beeping is not an indication of another problem? I have a Cyberpower 1500VA/900w and it gives one long beep for overload, two short deeps when switching to battery, and a continuous alarm for low battery. The Maverick may not have the same alarm setup, but I'm assume something similar.
The Maverick is a Line-Interactive UPS meaning it has two functions. The first is to balance or condition line-power so that each plugged in item receives optimal and stable voltage. The second is to provide battery backup power in the case of total power loss or if line-power drops below a predetermined value. A line-interactive UPS has to switch to battery to use battery, and only does so when battery is needed. In short, the UPS will only use battery when specific conditions are met. Outside those specific conditions - the UPS will not use battery. Technically, a Line-Interactive UPS should work without a battery - battery backup will simply be unavailable.
After the initial charge, the UPS will only need to maintain the charge against natural decay (no battery is 100% efficient) and need-based use. Otherwise, the UPS will only draw enough power for self-operation and to power each item plugged into it and turned on. For self-operation, see how many watts your UPS draws per hour then figure out what you pay per watt/hr.
It's true that there is some power draw when a device is plugged in but turned off. And while I agree there is an environmental and fair-consumption ethics argument - your electric bill should not be significantly impacted. That is unless you regularly experience total loss of power and severe fluctuations in power, resulting in regular depletion and recharging of the battery. Or if where you live there is a heavy consumption tax.