Tracy R Reed wrote:
kelsey hudson wrote:
I have three, and all the batteries in mine are 8 years old. ouch!
They all need to be replaced, but that's like a $400-$500 problem.
You sure it will cost that much? UPS has gotten a lot cheaper and
I'm certain it will, for the quantity and type of batteries mine use.
smaller in recent years. Depends on your needs of course but for home
use I picked up one of these:
http://www.newegg.com/Product/Product.aspx?Item=N82E16842101002
That's a line-interactive unit that probably doesn't have true sinewave
output.
The units I have are all on-line UPS, meaning the input is converted
immediately to DC, then back to AC (so the inverter is running
constantly). Additionally, these have true sinewave output, and the
power is guaranteed to be clean.
On the cheaper line-interactive models, I've experienced failures when
the load abruptly switches to battery. Either the switchover time isn't
fast enough and some equipment reloads/crashes, or the inverter blows
shortly after taking on the load. After that happening more than once I
decided I'd not buy another line-interactive unit. Note: Anything APC
sells that is a desktop, tower, or rackmountable unit is
line-interactive. They only produce on-line UPS in their symmetra line
and other larger datacenter-class UPS.
Two years ago. It's cheap ($99) and works great. It has easily saved me
$99 in lost productivity over the past month alone as we have blown
circuit breakers in my house 3 times due to having some roommates who
have an unusual amount of gear running.
I've also got 6 hours (!) of on-battery runtime because mine are grossly
oversized ;) SDG&E had to do some work on a distribution transformer
down the block last year, and I didn't lose any connectivity at all
throughout the entire period.
-kelsey
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