Thread: UPS Pure Sine Wave Inverter

Originally Posted by comet28024

Would it be possible to use a UPS such as this one as an inverter. They use a 12volt battery and claim to be pure sine wave outputs. You can get them dirt cheap on ebay.

Now can you connect this to your car's battery and use it as an inverter? Has anyone done this. Are they truely pure sine wave?

http://www.apc.com/resource/include/...base_sku=SC420

The words "dirt cheap" and "true sinewave inverter" do not go together. Ever. They might be stepped square wave inverters. Meaning that they have more steps inbetween on and off. For instance a basic square wave is either on or off. A stepped square wave has on, half on, off. Of course the more steps there are the close to a true sinewave you begin to approximate.

Do you have a link for the auction that is cheap with a true sinewave inverter?

http://cgi.ebay.com/APC-Smart-UPS-10...QQcmdZViewItem

I have one lying around that I will try to scope later today.

I'll let you know what I figure out. They claim pure sine wave inverter on their website and from the few people I've talked to it appears to be legit

I'd say yes....
I'm using an APC 250w UPS that i picked up for £2 at the local recycling center ! its hardwired to the battery (30A fuse & old jumper lead cable) the original Lead acid was thrown away.. Its running a dell desktop & adaptor for the 12"... Sometimes i use it to charge my 2 way radios as well.. just for a laugh we hooked up a 42" plasma to the car pc !!... (240W alone!!)
It stays on most of the day and takes about 6 hrs to drain the van batt (from bitter experiance).. Mind you the batt in the van is massive !, runs a bit warm in the summer, and only shuts down during cranking if its been on for 2hrs or so (without the engine running)...
bit of a pain having to lean under the passenger seat to start it up - then ive been hard shutting down the PC for 2 years (i just know its going to catch me out soon )

Next i'll add a fan & start - shutdown controller !

So i rekon there great !...

PS Disconect the alarm buzzer !.....

Steve

Knew i was tempting fate....

PSU failed this morning (Diode s/c)
No Nav for 300 miles...

Fixed now... Fan Added, think i may get an inverter though... really cheap on e-bay.......