You don't need a pure sinewave UPS for a projector or any device that uses a switching power supply. The only HT components that would benefit from a sine wave UPS are high quality audio products like DACS that have linear power supplies.
Really low cost UPS units actually put out a 170v square wave but as a switching power supply can typically run anywhere from 87 to 264 volts, it doesn't care. Also as switch mode power supplies basically just rectify the direct AC line to DC, waveform distortion doesn't matter either.
No need for expensive "online" UPS units either. The power supply in the projector typically has enough ride through to handle the switch over. Most mid priced UPS units have good surge protection and filtering built in.
Both APC and Cyberpower are great for what you need.
Me? Well I use a high end Liebert online 3KVA pure sinewave unit.
Costs over $3K new. But I got it free as it needed new battereis, a $120 investment. Now here's the downside. It pulls 60 watts just to run with no load attached. That's just wasted power I have to pay for 24/7. In a pro environment who cares, but in a home... So that's another thing to consider with higher end pro UPS units.
Really low cost UPS units actually put out a 170v square wave but as a switching power supply can typically run anywhere from 87 to 264 volts, it doesn't care. Also as switch mode power supplies basically just rectify the direct AC line to DC, waveform distortion doesn't matter either.
No need for expensive "online" UPS units either. The power supply in the projector typically has enough ride through to handle the switch over. Most mid priced UPS units have good surge protection and filtering built in.
Both APC and Cyberpower are great for what you need.
Me? Well I use a high end Liebert online 3KVA pure sinewave unit.
