The standard square wave approximation to sine wave UPSes are cheaper, and are fine for most computer electronics. However, for some devices and certain mechanical appliances (eg. ones with electric motors), you're safer with a pure sine wave UPS. I bought this for a tankless natural gas water heater. (Yes it requires some electricity.)
The CyberPower doesn't have a huge battery life, but then again, it's way cheaper than most of the competition for pure sine wave output. Here is a video of what the waveform looks like for this product:
https://www.youtube.com/watch?v=4QlF5vJlXaA
$199.99 at Future Shop / Best Buy & Amazon.ca
$187.49 at Memory Express after price match (normally $249.99)
FS (free ship): http://www.futureshop.ca/en-CA/produ.../10173919.aspx
BB (free ship): http://www.bestbuy.ca/en-CA/product/.../10173919.aspx
Amazon.ca (free ship): http://www.amazon.ca/gp/product/B004...pf_rd_i=915398
ME ($4.99 ship): http://www.memoryexpress.com/Products/MX32714
The CyberPower doesn't have a huge battery life, but then again, it's way cheaper than most of the competition for pure sine wave output. Here is a video of what the waveform looks like for this product:
https://www.youtube.com/watch?v=4QlF5vJlXaA
$199.99 at Future Shop / Best Buy & Amazon.ca
$187.49 at Memory Express after price match (normally $249.99)
FS (free ship): http://www.futureshop.ca/en-CA/produ.../10173919.aspx
BB (free ship): http://www.bestbuy.ca/en-CA/product/.../10173919.aspx
Amazon.ca (free ship): http://www.amazon.ca/gp/product/B004...pf_rd_i=915398
ME ($4.99 ship): http://www.memoryexpress.com/Products/MX32714