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This is a sub-selection from One less box of Fodge Rounds!

Crookshanks

join:2008-02-04
Binghamton, NY
reply to AMejia1976

Re: One less box of Fodge Rounds!

Hmm, not sure which model you're getting for $75, but maybe try one of the higher end ones? They are better for your gear anyways, the entry level models put out a step approximated sine-wave, which isn't a true AC waveform, and not appropriate for many pieces of equipment. In particular, I'd question if it's appropriate for your aquarium. It'd be fine for the heater(s) but probably not for the filter motors/air pump.

I have two server grade (smart-ups) models in my house, one that runs my PC/DSL modem/wireless gear, and another on our entertainment center. My communications setup receives nearly two hours of runtime, it's the primary reason why my PC has an uptime >one year, which certainly wouldn't be possible with the reliability of our electric grid around these parts!

07:30:11 up 467 days, 5 min, 21 users, load average: 0.02, 0.07, 0.11


AMejia1976

join:2000-07-29
Kissimmee, FL
Looked at the cost/ROI between APC 750es and cant remember which servergrade one. The cost was just not justifiable given the amount of units I have and the likelly to remote possibility of having to replace so often.

At present I have about 50 events per week between lighting, voltage fluctuation/spikes. Got so tired of events I shut off the stupid warning beeeeeeeps!

Prices is lower for me as I work for a major retailer

But thanks for the assist. It is knowledgeable ppl like you who keep me coming back to forums/DSLR rather than talk to tech support with most tech companies.

@l3x
--
Semper Fi

Crookshanks

join:2008-02-04
Binghamton, NY
No worries. If you're going to use a consumer grade model I would plug your aquarium filter, air pump, and lighting into surge-only outlets. AC Motors won't handle the step approximated sine-wave well at all, and I'm pretty sure it's a bad thing for fluorescent ballasts too.

This website has a brief explanation, it's in the context of solar panel inverters but the same conclusions apply to UPS'es as well:

Some electronic devices may pick up inverter noise while operating with modified sine waveform. Using fluorescent lighting can be problematic when using modified sine wave inverters. Most of the equipment on the market is designed for use with sine waves. Some appliances, such as microwaves, drills, clocks or speed motors will not produce full output if they don't use sine wave current, moreover they may damage the equipment. Some loads, such as light dimmers will not work without sine wave at all.

It's safe to say any electronic device that requires sensitive calibration can only be used with pure sine wave inverters. For many electronic devices that don't require sensitive calibration, modified sine wave inverters are a more cost-effective option.

Personally, I don't like to use the cheaper UPS'es for anything other than resistance loads, like incandescent or halogen lighting. I know they are the only option for people on a budget and theoretically they shouldn't damage your PC, I'm just more comfortable feeding my equipment the waveform that it was designed to operate with.

(I say theoretically because the power supply in your PC should isolate the motherboard/cpu/other components from inverter noise. It does increase the burden on the PSU though, and if you have one with temperature sensors you'll notice that the PSU temperature increases while on UPS power. If you're only on it long enough to shut down safely I wouldn't worry about it.)