This weekend I was getting near the end of an 8 hour print when the power blipped for about a second. I thought – sure am glad I have my machine hooked up to a UPS. Then it blipped again and I though “double glad”. Then it went out totally. The print kept going fine on the UPS for over 25 minutes powering a Mini and an old iMac with core2 duo – although I dimmed the screen as far as it would go, and unplugged the mouse and keyboard too. It wasn’t quite enough juice though – the UPS died about 10 minutes before the power came back.
So I was thinking, I could get an inverter and a deep cycle battery, make a double-ended pronged cord, and then connect the inverter to the same powerstrip the computer and mini are on when the power goes out, relying on the UPS to make that quick switchover and giving me time to haul out a battery, inverter, and a double pronged power cable. I have two worries about this:
would I be feeding power back to the UPS the wrong way so to speak? The powerstrip is connected to an output from the UPS, but when I plug in the inverter, that line will be energized externally from the UPS. Anyway – is that bad? I figure I could get the power strip unplugged from the UPS in 5-10 seconds after connecting the inverter, being careful about the live prongs of course.
I was looking at inverters and there are cheap ones and more expensive “pure sine wave” models. Does it matter to have a pure sine wave? This question is contingent of course, on the answer to #1 being “no big deal.”