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can I connect a car battery to a PC UPS

can I connect a car battery to a PC UPS

can I connect a car battery to a PC UPS

(OP)
Can I connect a car battery to a PC UPS ?

If so, How?

RE: can I connect a car battery to a PC UPS

You should not.

Car batteries are not designed for that service. Nor is your UPS charger circuit.

You should just buy one the size you need.  No fires no violation of the UPS's testing certifications.

Keith Cress
kcress - http://www.flaminsystems.com

RE: can I connect a car battery to a PC UPS

it depends on what type of UPS you are talking about ( power level ) and what option can you select for the battery charging. Boost charging might be a problem for several types of lead acid batteries causing cracking the case and the leakage of the battery due excessive gasing.

In small one phase UPS as an emergency you can theoretically connect car batteries but the problem is that the car battery is designed to give high discharge current during very short time ( start up of the vehicle ) and it i not suitable for deep discharge and frequent cycling so you would "kill" the car battery very quickly in UPS application.

As mentioned by itsmoked due safety but especially to save your many in the long time horizont you should use deep discharge batteries.

Most often you can find in battery datasheet if it is suitable or not for UPS application or you can contact your battery supplier what is his recommended type for UPSs.  

RE: can I connect a car battery to a PC UPS

Do you need to jump start your PC?

Storage batteries are designed for deep cycle, i.e. thick plates, small plate area.

Car batteries are designed for a quick jolt, i.e. thin plate, large plate area.

It is just a packaging trick that the two look alike.

However be aware there are batteries that can do a little of both, but not very well (boat starting batteries).

RE: can I connect a car battery to a PC UPS

Not to mention small UPS batteries are always gel cells and car batteries are flooded cell so the charging voltages are not even the same.

Keith Cress
kcress - http://www.flaminsystems.com

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