ups for projectors - Page 3 - AVS Forum | Home Theater Discussions And Reviews
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post #61 of 70 Old 08-28-2018, 04:32 PM
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The power supplies in my both plasma TVs have a mild buzzing sound, which has an intensity depending on the brightness content of the image displayed. The brighter the image, the louder the noise. However, with the UPS on battery power, the buzzing noise becomes much louder. I’m worried if the TV could get damaged because of the UPS’ stepped near-sinusoidal current wave. Is this a real risk?

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Originally Posted by DigitalAV View Post
Oh, dang! I have an Epson 3700 on a Back-UPS 750 and haven't noticed any odd behavior (though, I wasn't looking for it). Perhaps plasmas have something akin to active pfc power supplies? Total guess.
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post #62 of 70 Old 06-16-2019, 01:24 PM
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UPS (battery backup) for Projector

Hey all,

I’m having a hard time finding threads regarding recommended surge protector/ battery backup units for my projector.

I’ve used APC in the past but was pretty disappointed with the battery life. I had to replace the battery every 2 yrs or so because the unit would only last 20-30 seconds after a power failure.

We have lots of lightning in Houston, so the surge protector part is pretty important as well

Thanks!
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post #63 of 70 Old 06-16-2019, 03:33 PM
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The trick to the batteries lasting longer is going overkill on the rating.

It's going to be difficult to get a recommendation because the model #'s are always changing.
Cyberpower, APC, Trip Lite, pick your poison, check Amazon reviews.

I would go with 1500+VA if you want the battery to last longer.

https://www.amazon.com/APC-Battery-P...gateway&sr=8-3

https://www.amazon.com/CyberPower-CP...gateway&sr=8-5

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post #64 of 70 Old 06-16-2019, 03:47 PM
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I have 3 of these, price is up, think I only paid $170.. maybe due to tariffs..
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
Can't remember if I have ever replaced the battlers.. maybe on the oldest one which must be 5 years old by now.. To be honest, have not had a power failure in a very very long time.. probably should yank the plug one night and check the run time..

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post #65 of 70 Old 06-17-2019, 09:07 AM
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Sorry for the slow reply, Tapatalk sucks. It never gives me reply notifications when I start a thread.

Anyhow, are any of these units decent at surge protection (like surgex) or should I be placing these behind a surge unit?
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post #66 of 70 Old 06-17-2019, 10:08 AM
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I've had one of these for 10 years - https://www.panamax.com/product/1500...unt-ups-MB1500

Expensive but it works, and mine has been bulletproof.
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post #67 of 70 Old 06-17-2019, 03:15 PM
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Originally Posted by trpltongue View Post
I had to replace the battery every 2 yrs or so because the unit would only last 20-30 seconds after a power failure.
I bought my battery backup at Costco, I taped the receipt to the back, when the battery dies I return and pick a new one up off the shelf. I'm on my fourth unit. I use it to run the cool down cycle during a power outage (several a year) and as a surge protector for the projector.

Last edited by BIGmouthinDC; 06-18-2019 at 04:48 AM.
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post #68 of 70 Old 06-18-2019, 06:16 AM
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That's a good idea Big! I have a membership so that's pretty easy

I'm looking at whole house surge units as well, trying to find something that has a big surge capacity as well as pass through so I don't have to sacrifice 2 breaker slots in each of my panels
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post #69 of 70 Old 06-18-2019, 06:20 AM
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I may be wrong, but I believe most UPS's have surge protection built in. I'm not sure how good it is compared to a dedicated surge protector, but perhaps someone here has more experience.

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post #70 of 70 Old 06-18-2019, 06:25 AM
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Quote:
Originally Posted by trpltongue View Post
That's a good idea Big! I have a membership so that's pretty easy [IMG class=inlineimg]/forum/images/smilies/smile.gif[/IMG]

I'm looking at whole house surge units as well, trying to find something that has a big surge capacity as well as pass through so I don't have to sacrifice 2 breaker slots in each of my panels [IMG class=inlineimg]/forum/images/smilies/smile.gif[/IMG]

I recently installed this from Intermatic.
https://www.amazon.com/Intermatic-IG...11123733&psc=1

I have not had it tested yet but I really like that it has consumable modules so the whole thing is not destroyed during a surge. The Electrician who installed it was very impressed with it.
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