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i read an Amazon review that said he could solve the fan noise by opening the unit and modifying the vents to allow more air intake, he also mentioned he desoldered the buzzer (since he found the beeping annoying) and criticized the unit for not addresing that from manufacture, i personally don't have that unit since i diy a double conversion system with a big lifepo4 battery instead for my room but came to this video to see if it suited my brother setup, great video!
I read some reviews that the smell gets better in about a month or more. The person was told there were things burning off inside the unit with use. I imagine or hope since I have one of these that the smell will go away eventually. I placed near a window for now until it will air out. My PC system only uses about 170watts, so without power I can get about an hour of this unit, no APC I ever had gave that.
In my house growing up we had an AC unit that would pull too much power when it clicked on and this eventually killed my gaming PCs power supply. Ever since then I've used a UPS to keep the power stable. They save you a lot of headache.
It doesn't appear to be easily replaceable as everything is pretty sealed off. I wouldn't recommend attempting to do so either as you could risk breaking it or worst, injuring yourself. I will say from my experience that the fan has ramped up a lot less. I haven't noticed it for a while now.
On another note, you should get Eco Play to send you one of their Power Generators, it would be good to have an honest review of that unit. It is not a bad price for what you get.
The wattage number on the left is the amount of power the DC to AC inverter is using. The load that you see on the right is added to it. So the true battery load is the left number. Also the "heartbeat" is a depiction of a sine wave. The unit puts out a pure sine wave so delicate electronics can be used with the unit. I have one on order for my remote PC in my shop. I need a UPS that will not need frequent battery changes. The noise and beeping will not be an issue. The next model will likely fix the shortcomings. Goodbye AGM batteries!!!!