I am surprised it gets down to -17C with it only drawing 60W. If I had a need to transport my stockpile, like moving to another state, I would buy one. I guess it could come in handy if there was a power failure but my higher cost peps are in food storage thermoses that will keep them frozen at least 12 hours and by then I would have my generator setup and running.
I think I shared it earlier in the thread which is why I didn't post it again. Here is the link:
did you go new or used?
You can't get a ULT25NEU model on eBay lower than about $1000 right now (that is working). You got a bargain on this one!
Is this the model that Walgreens/CVS are (or were) using?
If you can get it to withstand the inrush current from the compressor starting on the freezer, then it probably wont last longer than an hour at most for your consumer level 1500va ups (given the tiny batteries they use). When we size them for server racks, they start to get not only humongous, but down right expensive.
Mmh 4h with a "big" consumer UPS maybe, so you need one that can be extended like the SMX3000C with an external battery pack, but that's getting expensive lol
You could put your peps in a Thermos food storage container, I tested the 47oz model, it holds about 10 kits and it took about 5.5 hours to go from -5 to 32F. If you add a couple of ice packs to the freezer I bet you could get a few more hours out it. My 1.1cuft Amazon freezer will hold three of the containers. Add temp sensor that gives you notifications and you should have enough warning to fire up a generator.
I've been shopping for a freezer recently. Everytime I find one on a med/lab supply, I put the details/specs in Made-in-China and BAM! The majority are on their website at a fraction of the cost with a longer warranty ... seeing as though you'd be purchasing from the manufacturer and all.
I'm using a -40c chest freezer from Amazon. It holds below that. Single stage.
I have heard a lot of problems with ultralows.That's awesome!! We have 2 giant chest freezers so I would really like to get a smaller, cabinet/counter lab freezer, but still haven't quite decided on one yet. ... it also doesn't help that I get side-tracked looking up "lab freezers" on made-in-china and end up looking though all the mortuary freezers listed. All the different options, slide out lengthwise or sideways ... some drawers have "mortuary prep" setting while others are colder for freezing (for longer term stays, I suppose) ... the Dexter/Morticia side comes out in me and i can't get back on track! Lol!!
I replaced the acid batteries with 2x10amp LIFEPO4 lithium in each of my 3 Cyberpower Sine Wave UPS 1500watts. I doubled the run time - 2 hours for 65" TV with DVR/settop box (120watt drain). LIFEPO4 batteries have a BMS circuit board that protects you from making mistakes. I tested the UPS many different ways, trying to get it to burn, or melt. Nada. One year later, and still fine with LIFEPO4. They requires a charge voltage 2-3volts higher that lead acid, so this UPS does not over charge. It actually begins to cycle charge on/off when the LIFEPO4 reaches 95% full. It recharges to 50% in a day, and take about 3+ days for the drained Lithium batteries to get fully charged by the UPS. A 1500W UPS with LIFEPO4 batteries may do the trick if you only plug the freezer two hours on/off (the inside temperate will only vary 1-2 degrees). My chest freezer will remain below 32F after 4 days without power, and not opened. I now have have 4 X 100 amp LIFEPO4 connected to a 2000W sine wave inverter, for real power failures. I live in a hurricane zone. Been without power once for 5 days, so I learned. 79 watts X 12 hours=948watts. Freezer runs on/off so you need less, but a UPS is 80-90% efficient, 1500W is maybe 1200W. The defrost cycles of refrigerators are the killers. I have a Blink camera inside my freezer and can check the temp from anywhere (yes, the wifi signal is strong like the other cameras).
I don’t understand a goddamn thing you just said, but I like it! lol. I just need to know if there is a consumer product out there that I can buy.
Before you spend money on a power system, find a way to actually measure how the temperature in the freezer changes when it loses power. There are inexpensive weather stations with temp sensors that can live in a freezer, for example. There are also temp logging devices, that you could put inside a thermos like people use as extra pep protection. You may be surprised how long your freezer stays frozen without juice.
Agreed. Add thermal mass inside your freezer. Preferably something that will freeze and thaw at a low temp. My freezer has several gallons of 80 proof vodka in it. That thaws at around -18 and absorbs a ton of heat doing it. That will keep if frozen for days without power
