UPS and 18650s

Looks good, With a UPS AveageJoe Just did a test using a 24V APC and it looks like it should work great.
 
UPS system do work great. My experience with running them like that is
1. They may not work good with 100% runtime. Most of the cheap ones get really really hot
2. The voltage need to be checked and if needed hacked/set

I did run with a 600VA Compaq UPS against a larger battery bank and that one could run 12 hours straight with 90% load without issues :)

I have not done long run tests with lithium though but i dont see any issues as long as you are aware of how a lithium work and the fact that they dont like getting unbalanced in top and bottom use :)
 
while fiddeling around with some today i had the same idea, but not that far advanced yet.
i have 2 750va apc upss laying arround and getting dust. another one i saved from the dumpster is securing my pc at home, but with an alternative batterypack. i think we as a company should reconsider dumping them after a batteryback died in them^^
 
I've got one I need to work on, myself. It's the APC 1500 24V setup. I got the parts to beef it up. Just gotta put them in now. :p lazy bones
 
I have a APC 1500 Smart UPS running my home PC's and stuff for when the power blips. it's been working great. Only mod so far is the removal of the beeper. That's a must
 
Hahah, yep, the beepers need to be silenced. However, I'm going to do the UART communications and reset the programming in mine. You can actually turn the beeper off for power blips and only come on when the battery level gets low.
You can also change the wattage output as well. I don't recall the video (might have been knarl's video) that changed the wattage from 1500 to 2000 and 4000 surge. Not sure how that works with the physical equipment, but he tested it out and it worked. I guess maybe the FETS work harder. If that's the way it works, that makes sense when he added more FETS onto the heatsinks; which I'm going to do as well, and the add 2 more large caps. (some day I'll get the video compiled and the work finished :p )
 
Awesome @Korishan I'd Like to try that for my 1500. I also have a rack mount 1400 that I'd like to play with too
 
Korishan said:
I don't recall the video (might have been knarl's video) that changed the wattage from 1500 to 2000 and 4000 surge. Not sure how that works with the physical equipment, but he tested it out and it worked. I guess maybe the FETS work harder. If that's the way it works, that makes sense when he added more FETS onto the heatsinks; which I'm going to do as well, and the add 2 more large caps. (some day I'll get the video compiled and the work finished :p )

You meant knurlgnar? I remember that guy. Here is all his videos about this topic, there is a lot of them. Worth to watch:
https://www.youtube.com/user/knurlgnar24/search?query=ups
 
Fercsa, yeah I've posted a couple of his videos pertaining to the UPS. It was the one about connecting two together in series to get 240V output.

I'd love to get ahold of a few more UPS's. Rack mounts would be awesome, though not sure if I can conjure up one of those.
However, I've been watching on Govt auctions for UPS's and other electronics. I haven't bought anything yet, but I'm at least registered to purchase if I find something worth my time.
 
FERCSA said:
Korishan said:
I don't recall the video (might have been knarl's video) that changed the wattage from 1500 to 2000 and 4000 surge. Not sure how that works with the physical equipment, but he tested it out and it worked. I guess maybe the FETS work harder. If that's the way it works, that makes sense when he added more FETS onto the heatsinks; which I'm going to do as well, and the add 2 more large caps. (some day I'll get the video compiled and the work finished :p )

You meant knurlgnar? I remember that guy. Here is all his videos about this topic, there is a lot of them. Worth to watch:
https://www.youtube.com/user/knurlgnar24/search?query=ups

Yeah - I miss Knurlgnar24 too.
 
I did the upgrade of a 1500W Smart APC UPS. It's about adding extra Mosfetts (from another unit) and extra cooling for heatsinks on the mosfet and transfo (that one gets hot). and a capacitor, if I remember correctly.

You will be able to pull more watts or the original power for a longer time.

not so easy to do the modifications, but if you have an identical one to scavenge, easy enough to find parts.

I remember to have a special software (bought from a russian guy) to reprogram the settings.



my converted UPS is the one I'm going to connect to my 18650 packs, if I can find and test enough cells.

regards

Stefaan
 
Korishan said:
Fercsa, yeah I've posted a couple of his videos pertaining to the UPS. It was the one about connecting two together in series to get 240V output.

I'd love to get ahold of a few more UPS's. Rack mounts would be awesome, though not sure if I can conjure up one of those.
However, I've been watching on Govt auctions for UPS's and other electronics. I haven't bought anything yet, but I'm at least registered to purchase if I find something worth my time.

Where are you located? I can get the server ups almost at any time. I could ship to you but Im guessing it would be $$$. Or if you end up finding one, I tore apart about 8 ups units to get the mosfets out so I could also send you some of them. Just a thought
 
I took my UPS board out and looked at the FETs to get the numbers, as well as the two big blue caps (i had to buy 4 to get 2 for the upgrade). The FETs are actually cheap.

Joe: I remember we talked earlier about the UPS's, I dont recall though: do you get the old UPS's free? If not, how much would they cost (about)? Shipping is usually gonna be around $15-$25 without the batteries (of course).
 
Korishan said:
I took my UPS board out and looked at the FETs to get the numbers, as well as the two big blue caps (i had to buy 4 to get 2 for the upgrade). The FETs are actually cheap.

Joe: I remember we talked earlier about the UPS's, I dont recall though: do you get the old UPS's free? If not, how much would they cost (about)? Shipping is usually gonna be around $15-$25 without the batteries (of course).

I gave him $10 for the first one then he just started giving them to me :D . There heavy

I have 5 APC's:
1- APC Smart-UPS XL 3000 Rackmount (SU3000RMXL3U) 2700W / 3000VA
1- APC Smart-UPS XL 3000 Rackmount [size=medium](SUA3000RMXL3U) 2700W / 3000VA
2- APC Smart-UPS (SUA3000RM2U)2700W/3000 VA
1- APC Smart-UPS (SURTD3000RMXLT3U) 2100w/3000VA
and 1 other odd ball that takes 72v batteries



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Hrmmmm..... what are their weights w/o the batteries? I tried to do a cost estimate, but the APC site shows the weight "with" the batteries. I'm sure the units don't weight 100lbs w/o the batteries. (excluding the 72V version)

Really interested in the "2- APC Smart-UPS (SUA3000RM2U)2700W/3000 VA"
 
you can estimate the 3kw ones at 20-30kg, just by eyeballing, dont have a dead one in "storage" aka as a pile of dead pc and server tech in the company
 
Actually, just thought of something. Going back to the APC web site and clicking the RBC43 replacement pack, the pack itself weighs 20Kgs. Ok, so the approximate weight for the UPS itself comes to about 30Kg.

USPS pricing would be about $80:USPS Calculated Costs
I doubt they'd ship media mail, though I wouldn't be opposed at trying.

I'd still pay that for one of those units ;)
Altho, Joe could get an exact pricing with the size of the box he'd use.
 
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