Gindacu wrote:I purchased the CyberPower CP850PFCLCD PFC Sinewave UPS 850VA 510W PFC Compatible Mini-Tower from amazon last year and have been very happy. Retails for $115. Has 5 or so outlets that are UPS protected and 5 or so outlets that are only surge protected. Front has a nice and simple LCD display and most importantly the "power is down" beep can be turned off! Key for us as we have one in our living room and don't want to wake the baby.
Just an FYI, that model is actually a sine wave approximation, not a true sine wave. What this means is instead of having large square waves, it uses tiny step waves to approximate a sine wave. If you look at it with an oscilloscope, the waves will more closely resemble a ziggurat than a smooth wave.
Now I'm not saying this is a bad thing. If your power supply is fine with the approximated sine wave, then there's not too much cause for buying a more expensive true sine wave unit for home computers. And this approximated sine wave is much better than a square wave unit. But it's something to keep in mind if you have a sensitive power supply that won't accept anything short of a true sine wave.
1530jesup wrote:Need to replace my current UPS and trying to decide among the dozens of options available between $60 and $125 or whether it pays to go higher up the scale. My need is just my desktop computer.
My Belkin is 10+ years old and I have changed the battery twice. Living in the lightning capital of the world I need to have that 15 minutes of pause time when Florida Power blinks out during a storm.
As usual I use the Amazon link at the top of our page; thanks for any suggestions, Rich
My personal UPS requirements are:
1) A fan in the unit to keep everything cool (you'd be surprised how many cheap UPSes skip the fan, but you need good airflow for optimal battery and electronic life).
2) Approximate or true sine wave.
3) Can use open source control software like apcupsd or NUT (Network UPS Tool) to control the unit.
4) Preferred a unit with automatic voltage regulation (AVR) that will correct for small under-voltage (brownout) or over-voltage (surge) incidents without going on battery (helps optimize battery life).
Requirement 3 eliminates most units APC has produced in the last several years, as they have moved to a proprietary control system that is not fully supported by either apcupsd or NUT (although both projects can control some features through the USB interface, neither can use the serial interface or the full feature set of the USB interface).
TrippLite and CyberPower both meet requirements 2 and 3. It was very difficult to find out about the ventilation design of CyberPower, so I chose TrippLite for my last UPS purchase due to requirement 1. I narrowed my search down to two TrippLite models: BC600SINE (approximated sine, vents but no active fan, ~$120 price) and SMART750SLT (true sine, active fan, AVR, ~$275). I went with the more expensive model since it more closely matched my requirements, and also has a longer runtime for comparable loads.