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CyberPower Value 1500ELCD SOHO UPS Uninterruptible Power Supply $227.80 Delivered @ Smarthomestoresau eBay
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Simulated Sine Wave if anyone was wondering.
In the UPS world is this good or bad?
I know nothing but I assume pure sine wave is better
It's the budget option. If you've got some electronics that need really good stable power, then you probably want a pure sine wave UPS. If you're just using it for your TV/computer/printer/monitor/etc simulated will be fine.
'Pure' is best but 'simulated' is good enough. 'Simulated' may work things a little harder and therefore may slightly reduce their lifespans but of course this is only while the UPS is running on battery which in most cases should be the exception.
All UPS's are simulated, they are inverting DC to AC. There are basically three ways that you can get AC from DC.
(1) square wave - you switch between +340V and -340V really quickly, it'll still result in 240V RMS, but it won't work for computers and other switching power supplies. This is fine for things like heating.
(2) modified sine wave - this is usually taking a square wave and adding it to another that has been phase shifted by 90 degrees, which will create a +, 0, - pattern as opposed to a +, -, +, - pattern of a square wave. Doing this again and again will get you close to a sine wave. This is fine for electronics, but won't work if you're trying to run an AC motor off a DC power supply.
(3) "pure" sine wave - even though hit's not really pure, it's closer to a sine wave because it's less choppy, so an AC motor will be able use it with less heat generation. It's more expensive because it needs an extra step in the inverter.
There are benefits to a "pure" sine wave UPS, e.g. your PSU will probably run quieter without that "hum" that you might notice when running off a UPS. For line-interactive UPS's which only come in if the mains switches off, it won't matter. If you intend to actually run off the batteries (i.e. an "online" UPS), with the AC only used to charge the batteries, then yeah, I would go for the pure sinewave types.
Thank you, that's a great explanation.
Sorry for the noob question, but is the internal battery of this unit user replaceable?
Depends on the user, it is possible with a bit of work.
Thanks. Will I need to do it anyway in the first one-two years?
It's (most likely) two of the nbn size lead acids so depends on use and if you keep it charged.
I've got this one or very similar a business was throwing out and it's a much better alternative to NBN battery backup as you can plug your network router in as well.
I got the replacement battery for my Belkin UPS from my local Battery World. Maybe check with them to see if they carry a replacement for this model.
Do they list them on site or you took it in ?
There's a listing for a replacement battery on eBay. It's "12V 9AH SLA battery 50w per cell" and $80.
I took the old battery out and gave them the model number over the phone. They had a few in stock. Was way, way cheaper than buying a new UPS which I was pretty shocked by since I thought that most of the cost of a home UPS would be the battery.
@freesteakknives: Thanks, i'll try that, i have an UPS i was going to buy a new UPS, but might just do that
if you after a pure sine this might be better https://www.computeralliance.com.au/900va-cyberpower-pfc-sin… $219 900VA CyberPower PFC Sinewave Series Tower UPS with LCD 2 Year CP900EPFCLCDa
Price used to be better- https://offer.ebay.com.au/ws/eBayISAPI.dll?ViewBidsLogin&ite…