Testing UPS Output Waveforms

Post by Saris » Thu, May 14, 2026, 11:11 PM UTC

butvacuum wrote: post #90

xenadu02 wrote: post #54

For some time I've been curious why none of the major UPS manufacturers offer LiFePO4 UPS units. They'd be smaller, lighter, and have a longer run time all else equal (dramatically lower shipping charges). Batteries wouldn't need replacing nearly as often. Yet as far as I can tell none of them offer anything in this area except at the extremely high end. Even Ubiquiti's UPS offerings are garbage simulated sine wave w…

LiFePO4 generally has a 0.5 or 1C discharge. You'd end up with a 500W UPS that could run for 10 hours, or 48v+ battery packs. and yes, they're also happy to heave to: plenty of DC ups' use NMC. Apc can't even be bothered to make a consumer class UPS that works with PFC- at all.

Depends on the type of LiFePo4 cells, ones designed for higher power can easily do 5-10C or more. But that's not needed for a UPS. Most common high energy cells can handle 3C.

3C or 20 minutes of runtime would be in the realm of most UPS ratings (remember the LiFePo4 cells have a lot more energy/runtime in the same space).

Post by bombela » Fri, May 15, 2026, 5:44 AM UTC

Dylan16807 wrote: post #79

bombela wrote: post #78

Earlier quoted context omitted.

How much does it cost and where to buy? If I have to call, I cannot afford it.

Okay so click on the first link I gave you. And then scroll down to the model you want. The second to last column is price. Click on that (Or click on the first column where it has the model number. Either one works.). Then click "add to cart".

Ah, only a single column for me. No ad blocker. The html source doesn't even include the word price! I must be getting a different page than you somehow.

I can click on the picture to get the details and volume pricing. The 300W model has no price and a minimum order of 30 units. So I thought it ended there.

But it recommends to check out https://www.powerstream.com/DC-PC-24V-400.htm where I ultimately found the add to cart for $300.

Re: Testing UPS Output Waveforms

Re: Testing UPS Output Waveforms