What is wrong with my inva tubular battery?

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arroy_0210

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I use exide inva tubular IT500 battery with microtek ups (E2 series). Earlier there was no problem but recently I notice that the ups is never able to charge up the battery fully after power-cut problems. The UPS is expected to automatically charge up the battery and stop when a fixed voltage is reached (may be aroud 13.7V). At present the UPS is able to charge upto 12.7V and then the charging indicator keeps blinking but there is no further charging only the UPS gets hotter and hotter. At this point I keep the UPS unplugged. After disconnecting the battery the terminal voltage drops to 12.3V soon and stays there. What is causing the problem: the battery or the UPS? Can anybody please suggest what to do? The dealer had been informed but they are taking time to respond.
 
Did you check the distill water level.If the level is good,then it could either be that the battery has reached EOL or the UPS charger is gone kaput.

Give the battery to the dealer or if you have a separate battery charger then charge the battery till it reaches a voltage of around 13.8 to 14v.
 
Pls check the battery water level first. If it is low, top it up and observe for 2-3 days. Also, are you noticing a significant drop in backup time for the same load? How old is your setup?

Also, you have mentioned that the UPS gets hotter & hotter with charging. When the charging light is blinking, is the UPS fan (observed through audible sound) working too? I have the same set-up and while charging for even 3-4 hours at a stretch, the UPS never gets hot beyond a certain point. The fan maintains the temperature.
 
The water level in the first slot went below normal level and that had been already taken care of. The problem had remained same. The battery is about 5months old. The backup time had not reduced however. The problem is as per UPS charger specification, at STD mode of switch, the battery should be charged to 13.8V but in practice it is being charged upto 12.7V. Why should it be so?
 
Its best to find to take the battery to the battery dealer and see if they can charge it to 13.8v or so ,if they can then the problem is with the UPS,
 
Not so easy to move the heavy duty battery to the service center. I would say check with another inverter and my gut feeling inverter is faulty. Due to under charging battery cells may go weak, be very very better dont use inverter before the battery gets charged fully.
Ideally lead acid battery should be charged till 14.4V (bulk charging), later the charger should work in trickle charge mode.
Also ensure the charger is charging at C/20 rate which is 7.5A or max 8A. You can also buy hydrometer for 100 bucks and check the specific gravity. This will give the clear idea of the battery state. 1.25~1.28 is fully charged battery. Earlier our inverter used to charge always. 2hr powercut leads atleast 8hr charging. Bought Thimson brand hydrometer and checked when fully charged. It was around 1.31. Its very high and definitely will reduce the life of the battery but the current capacity will be more. Added distilled water 0.5cm above MAX mark. Now the reading says 1.28 when fully charged and takes just 2~3 hrs max to charge the battery.

Regards,
Vijay
 
My setup is Microtek SWE2 875VA + Exide IT500 (both,2 years old). I measured the terminal voltage of the battery and found it to be 13.9V in fully charged condition.
Seems some problem is definitely there with your setup.
Do let us know the solution provided by the dealer.
 
Why my exide battery get hot when charging..yes i know..Replacement is needed.but why is the cause of hot.is anyone know
Please help
 
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