After several years since last ordering from SCAN, I decided to place a new order recently.
I ordered a 650VA UPS (390W output) to protect my desktop PC from very brief power outages (lasting just seconds) that have occurred in my area in the past.
On the day that the UPS arrived, I did some basic tests with it. I started by plugging it in to a power meter/tester (which shows things such as power being drawn in watts, etc.) which in turn was plugged in to a wall power socket. This way I'd be able to ensure I was drawing a power load that's well within the spec of the UPS.
Then, I did my first basic test: With just a few peripherals connected (cable modem, WiFi router, network switch, etc.), which were drawing a small load of only around 40W in total according to the power meter, I turned off the switch at the wall socket to simulate a power failure. The UPS immediately took over and power to those peripherals was maintained. After about 3 seconds, I turned on the switch at the wall socket again to restore normal mains power.
The battery charging light on the front of the UPS then blinked for a minute or so as it ensured it was charged back to 100%. At that point the status lights indicated it was ready and operating normally.
Then, about an hour later I did my second basic test. With the addition of my PC and monitors connected to the UPS and turned on, I could see that I was then drawing a total load hovering below 300W when the PC was idle, and just over 300W when the CPU was under load. This confirmed that I'd sized the UPS spec appropriately, as I was operating well under the 390W output capacity.
While watching the power meter to ensure the total load was still around the 300W level, I turned off the switch at the wall socket to simulate a power failure again. Immediately, power to the PC, monitors, and other peripherals was lost. The UPS did not take over, and the consequence was the same as if there'd been a power failure with no UPS present. Obviously, this meant the UPS could not be relied on to provide emergency power in the event of a power failure for my PC. Just prior to switching off the wall socket, the UPS status lights were indicating that everything was fine and that the UPS was supporting the connected equipment. Yet, as soon as the power was cut, the UPS didn't spring into action and didn't manage to stop the power being lost to the connected equipment. Basically, it didn't do anything. No, clearly this UPS would provide no peace of mind. It couldn't be trusted.
So on that same day I raised an RMA with SCAN to return the UPS for a refund. Because it didn't provide any protection at all in my second test, I indicated that it was faulty.
Within a few days of SCAN receiving the item back, I get an email from SCAN saying "Status Notification - Items Tested, No Fault Found", and that I should contact their returns staff. Viewing the status of the RMA online, I could see the notes that they'd added: "UPS tested using Scan test bench, After fully charged disconnected power from main UPS did take over fine and power to my desktop PC and monitor works fine. No issue".
No mention of what the power draw on the UPS was at the time of their test. I imagine their test was done somewhere between 40W and 300W, the two levels I'd tested. Also, by saying to me in no uncertain terms, that there is no fault, they are essentially saying to me that I'm lying.
When I phoned, the only extra information the person I spoke to could provide was that their technician had turned off the mains power and the UPS had operated on battery power for 25 minutes. Well, the runtime is not really of any relevance to this particular case, what I cared about first and foremost is that the UPS would take over in the event of a power cut and in my testing that didn't happen.
Anyway, the customer service person arranged for a refund to occur under the 14 day procedure, which I'm told I should receive in 3-5 business days. But my concern here is about what would have happened if this was not an immediate return and was not done within 14 days. Imagine that. There would now be awkwardness, frustration, and arguments about how to proceed. I've done valid tests on my side, I've told them it's faulty, and yet SCAN say to me "Items Tested, No Fault Found". My word against theirs. If I was outside the 14 day period, the process of receiving the refund would now be very dubious.
I don't think I'll be inclined to order from SCAN in future.