That looks like a Cannon Plug - do a Google to see. Is it a screw on or 1/4 turn to lock?
No, it's a straight push-in, and I should have noted, for scale, that it is the same size as a PS/2 keyboard or mouse plug, just with different pins.
That looks awful special to me, if you didn't have to use it much, I'd go with a good 12 volt to 120 volt inverter. The rub with the one from Cpap.com is it propritary and a up converter circuit, both making it cost more. Jim
I actually have an inverter, but after tropical storms here there can be several days of power outage. I have a couple of deep-cycle batteries I keep a float charge on for that, and they could be easily wired in series for 24v. You lose power to heat whenever you do a conversion, and I dislike the idea of converting from 12vdc to 110vac to 24vdc even more than I dislike the idea of converting from 24 to 12dc. Inefficient and kludgy, and the upshot is that it would not run as long. Also, while inverters of this wattage are relatively cheap - cheaper than $165 anyhow - I wonder whether the lack of real sine wave inversion would mess up the machine. Probably not since it's just going into a transformer. But still, I HAVE perfectly good 24vdc power, all I need is a wire and a plug!
I'd also be thingking APC that was powered by the bigger 12 volt batteries, mounted outside the APC. When my batteries fail in my APC Back-UPS NS 1250, I think that's what's going to happen to it
Does APC make a UPS which is powered by large externals? I use marine deep-cycle wet cells as the cheapest available.
I'm still gonna try finding that plug... and if I don't, I may chop the one off the transformer the first power outage we get.
