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Old 07-10-2009, 09:08 AM
prashanth_brp prashanth_brp is offline
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Default Connecting solar battery to APC UPS

Hello.

I have APC back UPS BE650Y-IN (Model: http://www.apc.com/products/category...13&segmentID=1
select BE650Y-IN from first pulldown menu to see the specification). Its battery is dead now.
I have solar system in home. At present it is used for only lights. Solar system has the battery which
looks something like this (http://www.apexbattery.com/8a22nf-so...batteries.html).
Now I want to connect the APC UPS to this battery. Is this connection possible?.
UPS battery is 12V,3A and Solar battery is 12V,6A (Dont know exactly). Will this connection cause
any problem to UPS?. I want to use this UPS for only TV(90W).
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Old 07-10-2009, 02:08 PM
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beenthere beenthere is offline
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The biggest problem is the power of the TV. 90 watts is not much at 120 VAC, but to supply 90 watts from a battery of 12 volts will require 7.5 amps of current. The inverter is not perfectly efficient, so plan on needing a battery that can supply at least 8 amps.
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Old 07-13-2009, 08:35 AM
prashanth_brp prashanth_brp is offline
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Quote:
Originally Posted by beenthere View Post
The biggest problem is the power of the TV. 90 watts is not much at 120 VAC, but to supply 90 watts from a battery of 12 volts will require 7.5 amps of current. The inverter is not perfectly efficient, so plan on needing a battery that can supply at least 8 amps.
Thanks for your answer.

I was running TV with the same UPS(old battery 12V, 3A) upto 45min before its battery bacame dead.
Now I planned to go for 12V,6A battery. Since there is only change in AMPs, I thought there may be some problem of more heat generation which requires additional heat sink.
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Old 11-15-2009, 07:57 AM
TinyJoe TinyJoe is offline
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Quote:
Originally Posted by prashanth_brp View Post
Thanks for your answer.

I was running TV with the same UPS(old battery 12V, 3A) upto 45min before its battery bacame dead.
Now I planned to go for 12V,6A battery. Since there is only change in AMPs, I thought there may be some problem of more heat generation which requires additional heat sink.


On our RV we couldn't figure out for the longest time how to run the home theater system and get a proper run time without draining the main batteries. After a lot of research we decided to modify an APC Smart UPS 1400 by removing the internal batteries and adding 2x 12v 75ah batteries. Now the home theater system runs for almost 20 hours before needing to be plugged in. I would recommend this approach to anyone. Gives you a much longer run time than the manufacturer and still gives you all the protection.



Joe
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