This particular 2700W (or 1980W) model is for those who have a workstation PC and need a lot of watts for hours of rendering/machine learning, etc., but it is highly worth it compared to online UPS which constantly supply power from their batteries, converting the AC supply to DC, but they constantly produce noise from their fans and their batteries wear out continuously from constant use, requiring replacement after a period of time to keep the UPS working, which is not the case here.

The batteries of Line-Interactive UPS only wear out when they discharge/charge because they have worked to power the devices; otherwise, they remain inactive and on standby until needed during a voltage drop/power outage. 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 huge model of this review or another Cyberpower Line-Interactive model. I have no experience with other brands (except for APC, which I personally do NOT recommend for reliability/lifespan), but this is absolutely true for Cyberpower UPS, which are, in my opinion, the cream of the crop.

For those wondering and haven't found an answer, the difference between ***XL and ***SL is that you can connect a battery extension to increase its autonomy, with the BP48VPT01 model.

There is also compatibility with the smaller 2200W model, the PR2200ELCDSXL. The SL models do not have such an external battery port.

This particular line-interactive model is ABSOLUTELY quiet when it doesn't need to supply power from its batteries, and it does so for a very short period of a few minutes, just enough to cool its internal circuits after its protection has worked. I wrote a similar comment on the other true sine-wave models of the CyberPower CPXXX0EPFCLCD series, and the same applies here.

Don't look elsewhere if it's for sensitive electronic devices, ESPECIALLY if it's for a PC that requires true sine-wave (pure sine wave) from modern PC power supplies (PSU) for many years now.

Incredibly reliable with thousands of voltage drops in their history (photovoltaics+generator) without ANY problem, nothing like the 4-5 power outages per year most people have in cities from the public utility, I'm talking about such long-term 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 less wattage than you think you need to save money, because nowadays you WON'T use it just for one PC or one monitor as you initially estimate, you'll see how many devices you'll end up running on it to protect them from possible outage/surge/lightning and more, as it has automatic AVR, meaning it corrects incoming undervoltage to reach ~220V.

I forgot to mention that "cheap" UPS units easily waste up to 20W (measured, not theory) on standby doing NOTHING, which means you'll be paying for 1 KWh every 48 hours...

This particular brand, thanks to its GreenPower feature, on standby (while working with devices connected, not off) does not consume more than 6-8W at worst (including the display, when you want it always on to show you something, e.g.). the Watts it sends to the connected devices), when it does not use the batteries, as it lets the current pass "freely" through it (it provides protection, not unfiltered).

In general, remember the wisdom of the people: "Cheap will sooner or later turn out expensive" or as the Americans say: "If you don't pay nice, you pay twice!".

With eyes closed, Cyberpower, NO other company no matter how tempting their brand or price may seem!

That's all, glory to God!