Do not look elsewhere if it concerns sensitive electronic devices, especially if it is for a PC that requires true sine-wave from modern power supplies (PSU) for many years.
This specific model of 900W (or smaller) is mainly for those who have a PC, but it is highly worth it compared to online UPSs which continuously provide power from their batteries, converting the alternating current into direct current, but constantly produce noise from their fans and their batteries wear out from continuous use, which need replacement after a certain period of time in order for the UPS to continue working, something that does not apply here (in terms of frequency).
The batteries of Line-Interactive UPSs only wear out when they discharge/recharge because they have worked to power the devices, otherwise they remain inactive and on standby when needed during voltage drops/power outages. In practice, it may take you years (with photovoltaic systems and a generator that turns on and off daily) to replace them, whether it is the large model of the evaluation or another Cyberpower Line-Interactive model. I do not have experience with other brands (except for APC which - personally - I do not recommend in terms of cost-reliability-lifespan), but this is absolutely true for Cyberpower UPSs which are the cream of the crop in my opinion.
This specific model, as a line-interactive UPS, is COMPLETELY quiet when it does not need to provide power from its batteries and it does this for a very short period of a few minutes until its internal circuits cool down after its protection has worked. The same exact comment applies to the other true sine-wave models of the CyberPower CPXXX0EPFCLCD series.
Incredibly reliable with thousands of voltage drops in their history (photovoltaic + generator) without ANY problem, no comparison to the 4-5 power outages per year that most people experience in cities (and write about in their comments), I am speaking to you from my extensive experience with them.
The definition of the word "investment" for the safety of your equipment.
ONLY Cyberpower for UPS, no other company! Personal opinion, DO NOT get the model with the watts you think you need for cost-saving purposes, as nowadays you will not only use it for one PC or one monitor as you initially calculate, you will see how many devices you end up using it for to protect them from possible outages/surges/lightning and more, as it has automatic AVR, meaning it corrects the incoming voltage it receives to reach around 220V.
I forgot to tell you that "cheap" UPSs consume up to 20-25W in standby without doing ANYTHING, which means you will be paying for 1 kWh every 48 hours...
This specific brand, due to its GreenPower feature, does not consume more than 2-3W in standby (while working with devices on it, not turned off) in the worst case scenario in the 540W model and about 5-7W in this 900W model (including the monitor, when you want it constantly turned on to show you something like the watts it sends to the connected devices), when it is not using the batteries, as it allows the current to pass "freely" through it (with protection, not unfiltered).
In general, remember the wisdom of the people: "Cheap will eventually become expensive" or as the Americans say: "If you don't pay nice, you pay twice!".
With closed eyes, Cyberpower, NO other company as tempting as their brand or price may seem!
Thank God it's over!