Well I needed a cheap UPS, my load requirements are low, approx 65 watts
2 x Raspberry Pi 8w
Synology Diskstation 410j (4x2TB) 39w
Netgear DGN3500 router 10w
Netgear Gigabit switch 8w
I bought the FSP Nano 800VA UPS from Scan.uk (my preferred supplier of tech) it cost £51.36, not bad
After considering a home made UPS, and pricing up what I would have to purchase, one from Scan was cheaper (and probably safer).
I have no idea of FSP’s reputation as a manufacturer, but they are big. Power supplies manufactured by FSP are sold by Antec, Sparkle Power International (SPI),OCZ, SilverStone Technology, Thermaltake, Nexus and Zalman under their own names. They are based in Taiwan
So they have the experience
With little expectations I unpacked it from the obligatory cardboard and polystyrene, a compact box, and overall, a compact unit.
It has a sealed lead acid battery, supposedly replaceable, one switch, two LEDs, and 2 standard UK 3 pin sockets. simple all plastic enclosure, boring and quite small for a UPS which is good.
There is no setup, just plug and play. After 8hrs initial charge I did the first disconnect test… a seamless switch over to battery/inverter accompanied by a single loud beep every ten seconds which could be heard throughout the house. There was an audible buzz from the inverter circuit while running off battery, but nothing too loud.
Assuming that there was full charge at the beginning of my test (there is no status display) with a load of 65 watts it sat there beeping annoyingly loud for 51 minutes.
Pretty much as expected. The rate of beeps doubled at 51 minutes which I assumed was the low battery warning, so the power was reconnected which happens seamlessly with a distinct relay click
The NAS, router and Pis had no problems throughout the test
So there you go, its been running for a few days now, and hopefully will blend into the background for a coupe of years before it needs attention
So far I would definitely recommend it with the caveat that I have little experience of its reliability