CyberPower UPS Battery Percentage is Fake When Charging
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- čas přidán 11. 03. 2021
- On discharge the percentage is derived from voltage curve. On charging... it's a timer!? At least on the CP1500PFCLCD it is.
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/ @markfurneaux2659 - Věda a technologie
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The only channel I use the bell icon on.
Many UPS's do this. I had a APC that did the same thing, even on discharge. I had hooked up a 5kw lipo battery pack to it and it would countdown the percentage all the way to 0 at the same rate as the internal batteries and continue running at 0% for another 9 hours.
Well, thats just f**ing ridiculously stupid. Running for at least another 9 hours at 0%. You have no way of knowing the actual charge level and it could cut out at any time.
@@simontay4851 The anxiety of never knowing if it will turn off is how you develop character
I have one with simple multiple led for battery level and it indicates low battery with large batteries even when the voltage is at 28v
I’ve always had problems measuring battery state of charge, only reliable method I trust is discrete ‘coulomb counters’ that measure how many Wh go in and out of a battery (like what laptop ACPI battery indictors use) but they’re vastly more expensive than just reading the battery voltage and applying a linear equation or LUT or in this case just a braindead timer! I imagine the microcontroller inside is the cheapest they could possibly use and they’re using 99% of program memory and this was the easiest way to implement a battery indicator while not upgrading anything and ensures the battery charge isn’t ended early by misleading terminal voltages leading to an early death by sulfation of the plates.
Also, thanks for introducing me to Monitorix back in 2016, I’ve been using it ever since but didn’t know you could get that kind of data out of a UPS on it!
Thank you for sharing, this helped me a lot!
I recently purchased a BR700ELCD. I could only get 120mins @ 100% charge. So I thought, lets replace with a BR1200ELCD which is supposed to essentially double runtime, anyways, it arrived at 50% discharge and Ive started charging, 4hrs later, now that it is at 100% charge its only 120min runtime!?
....so further to your video, I suppose it is fake and I should proceed with the full 10hrs recharge....
...your video saved me from having to deal with a return and a seller potentially getting burned for no reason, so, many thanks from us!
Just had the exact same experience with the battery and charger in a 1000PFCLCD after the Texas power outages. Battery was bad, but it kept saying the battery was full. Nice UPS other than the battery charge status issues
Hey, great video. What were your "float" voltages and if possible, do you know what voltage your ups cuts off power at and what voltage it peaks at while charging?
Standard charging curves are usually stated as X current for Y time by the manufacturers themselves in battery datasheets.
And it is a fair charging method for both defining product specification (as it characterizes brand new battery) and UPS use case because you are expected to rotate UPS batteries long before their end (probably something like 80% capacity decrease is the most common figure to characterize charge-discharge life-cycle).
It's a low end UPS, is kinda what I'm saying in other words..
Just bought an OR1500 rack mount off eBay for dirt cheap, no batteries, fixed the hacked power cable, plugged it in and it shows full bars on the battery % and a runtime of 90 or so minutes… no battery!! That readout is definitely complete BS when it has AC power connected.
So I have this UPS and just replaced the battery today after a five hour outage drained the battery completely and it never charged back up. I ran a self test after replacing the battery pack and it went down to 75% immediately. Is that accurate, or is there a way to "reset" it? A little scared that my PC is gonna shut off after the next outage again.
The counter will keep going up even if you completely unplug the batteries 🤣 At least it does on my Cyberpower.
What battery model you bought for this UPS?
Will this UPS work properly If I replace its battery with 24V lifepo4 (8S 3.2V/cell with BMS)?
After seeing your other video on upgrading to a deep cycle battery for a UPS have you ever upgraded this to using 2 deep cycle batteries?
Have the same model and actually having to replace the batteries in it and thinking of bitting the bullet with using deep cycle batteries.
My concern is I don't think this UPS has any smart charging so it probably would ruin the batteries by constantly running a current to it right?
Also do you have any tips on this for adding 2 deep cycle marine batteries around 100Ah? I think at highest it will pull 400 Watts if I am running a PC system at the time, but on average 200 Watts.
Did you end up trying this with ups with a pair of deep cycles batteries? I was thinking of doing the same.
@@zenonkazienko988 haven't yet. I bought some replacements for cheap currently instead of converting. Will be redoing my office this year and that will be my motivation
@@maximus4273 Fair enough, if I end up doing it I'll try and remember to post back with the results 🙂
That means it has to be calibrated to the battery. That brings me to my question: How do you run a battery calibration on this PSU? Mine shows 100% with run time of 730 minutes. That's wrong. Also changed the batteries, now it shows 100% but I know they were at about 30% when installed. It's either a gimmick or needs to be calibrated again.
thank you for sharing that was very helpful though I think mine is way older than yours 😅
Thanks for posting this. Just decided to replace my batteries on exact model as it died quickly when on battery power. So I did self tests a few days later and it would immediately drop to 20%, then do the slow climb up. Next day, did the test again when it is saying 100% and it immediately drops to 20%.
Just got some new batteries, turned on the unit and it was reporting 100%. Hit self test and it immediately dropped to 60%. Assuming they weren't really at 100% when I got them. Going to give it a day and will test again. In your experience should it stay at 100 or 90% during a self test with new batteries?
Very frustrating that I can't trust what it is reporting.
I'm experiencing this same issue with my CyberPower 1000PFCLCD unit. Got a new battery from CyberPower and it's still discharging quickly during a self-test that only runs for 3-5 seconds. The unit is less than 2 yrs old and it did not do this the first year when I performed a self-test. There needs to be a way to calibrate.
@@Mr.LakeShow I think I have the same problem with mine. I remember the old APC Smart UPS have a battery constant value that slowly went down as the battery capacity went down. Problem was it wouldn't reset to the original factory value after replacing the battery. I wonder if CyberPower UPSs have the same thing?
It's annoying, because the UPS shuts down my server when power gets low. I could disable that, but I don't want the server losing power before gracefully shutting down.
I can certainly see why they might do it that way - they have existing sensing for battery voltage, which gives them the discharge state of the battery while it's on battery. Someone might think "oh just use that while charging, you still get the charge level of the battery" but the voltage while charging will basically always be the output of its charger. I'm not sure why you believe they have current sensing for the batteries (they might) - but it is an additional cost, and charge current doesn't give you *that* much information in terms of the charge state of the batteries (you could have one battery at a dead short or wide open, and it'd think "oh I'm happily charging" for the former, or "oh it's done already :)" for the latter). Easy solution? Fuck it, throw a timer in there and ship it.
Almost every UPS I've ever worked on from APC, CPS, Eaton, Ultra, Tripp-Lite, etc. has had a low-side shunt resistor in the charger circuit. It's actually a common secondary-failure point since when something like a FET or diode shorts in the charger or main switcher, that current path shorts the battery and the shunts burn up. The voltage when charging is not just the charger voltage, since the charger is current limited. During the bulk charge the voltage will be increasing and this will continue very far into the charge since the current limit is so low.
My Cyberpower UPS just died the other day. Battery died. But UPS unable to be use as pass through without battery inserted. And it didn’t alert battery failure either. Pretty dumb.
If your Cyberpower failed and flashing screen (blue for mine), then it’s very likely the battery needs to be replace.
Batteries do not give much warning and can
fail suddenly, so it’s not the UPS’ fault.
That is not true. Internal resistance is getting worse and worse. It can be measured and estimate when it will fail.
It’s not fake. It’s not easy to calculate that data and part of the problem is the “surface voltage”.
I always disconnect AC and run them on batteries for a couple minutes to get true state of charge.
Surface charge affects the battery's internal resistance, and yes it can skew state of charge when measuring the OCV, but during charge or discharge when you have a significant current in or out of the cells its effect can be compensated for.