the alarm is going ON in the last couple days.....i can turn it OFF, after a few times, ON-OFF in that ups apc.
When the alarm is going off, check your LCD display panel for "System fault" codes. These are error codes that may [hopefully] give you a clue as to the problem and may [hopefully] give you a resolution. Check your UPS manual for the codes.
If your UPS is frequently kicking over to battery even though you are not actually having a power "outage", you may need to change the sensitivity of the UPS. This changes the transfer voltage thresholds. Check your manual for the settings, and how to adjust them. This can be changed via the UPS front panel buttons, or the software.
@Bill_Bright
and yes, the fact the pc turns back on IS normal, as the stock (win/sw) setting on low batt is hibernation/sleep,
not shutdown, unless changed by user.
Sorry, Waldorf but that is NOT the "default" (stock) setting. The default setting in motherboard BIOS Setup Menus (except some motherboards specifically designed as "server" motherboards), is (as per the "AC BACK" setting noted in my Gigabyte manual),
Always Off | The system stays off upon the return of the AC power. (Default) |
Different motherboard/BIOS makers may use slightly different wording. I just checked two other computers here, another Gigabyte and an ASUS and the default in all is "stays off". The fact the computer may have been in hibernation/sleep mode before power was lost is immaterial. Most users don't want their computers to automatically start up after power is restored. And that makes sense for security reasons alone. But also because power outages, and the subsequent restoral of power, is not always "clean". That is, power may "flicker" on and off until it becomes stable - or the storm passes.
See:
How To Configure Windows To Auto Restart After a Power Outage (technewsworld.com)
The point is, "if" we want our computers to automatically boot up when power is restored, we must manually change that setting in our motherboard's BIOS Setup Menus. Check your manuals for the steps.
But do note, however, this will only take you to the operating system's login screen. If your installation of Windows or Linux requires a password upon boot, and if you want your system to boot completely into the OS, you will need to do some significant tweaking of the OS too.
So, if you have security cameras, for example, that record video on your computer, you may need to change those settings if you have a power outage and want your Ring doorbell to resume recording after the power returns.
The biggest consideration actually becomes the strength of the floor since that many car batteries can weigh several tons.
Many many years ago, our air traffic control radio facilities had whole building UPS that were designed as "uninterruptible" power sources to maintain power long enough for the back-up generators to fire up, stabilize, then cut-over and supply power to the entire building.
When ever power went out, there would be about 50 - 60 seconds where everyone would hold their breath until we heard the generator start.
We had a battery "room", accessible only from the outside of the building. IIRC, there were about 60 large (~50lbs each) 12V truck batteries strapped to provide 48VDC power. The weight was significant but the bigger problem was exposure to acid and fumes. These batteries were not "sealed". In fact, weekly PMIs (preventative maintenance inspections) required us to check the specific gravity of each cell with a hydrometer.
No doubt there are some here who remember having to routinely check our own vehicle batteries and if necessary, top off each cell with distilled water.
And that leads me to the following:
i have yet to see any consumer grade UPS not having sealed batteries
Exactly! It was a HUGE relief when, back in the mid 70s, all those batteries were replaced with "sealed" lead acid batteries - the same type used in all gas powered cars today. I too have never seen an UPS that didn't use "SLA" (sealed lead-acid) batteries, or Lithium Ion batteries (which are also sealed).