Battery rating calculation for UPS

6 (PCs) X VA (wattage of each PC) X 1 (Hr)/Supply Voltage = Ah of battery required.

Provide some additional.

Experts may correct me, if I am wrong.

Hello sir,

Actually we have battery ratings at AH ratings that is amperer hour ratings means for example if we given as 1AH the battery can deliver 1 amps load for 1 hour. So as per your current requirement you can select the battery. For 2KVA 1hour back up means for indian electrical standard voltage atleast you have to series five to six number of 12volts 20AH battery.

I hope my answer will satisfies you.

By

V.Deepak

Things can be quite differenet , depending on type of battery offered and voltages. It can be VRLA or can also be tubular and even be Automotive flat plates/deep cycle type.

what ever is offered needs careful study, you have to see for 1hr usage , the ratings of batteries have to be lowered as batteries are rated for 5/10/20hrs as the type may be.When requirement is one hour derating with permitted depth of discharge will be quite high , depending on battery offered. Again some suppliers will offer with lesser depth of discharge as all batteries fail to recover to full charge , unless the charger is so equipped. This is basically due to stratification of acid and also higher sulphation in negative plates at high depth of discharge. my advise is Donot go for cheap solution. Generator is not UPS as its starting will take time.and you loose data.

Hello Minsaramanithan:

looks like gsuhas answered the question pretty well.

I was looking at the 'retail' trade and something for one machine only when I got mine. I would imagine a 'profesional' UPS with that much pawer is not going to be cheap.

UPS seem to vary in price. And would it not be more efficient to buy a small generator for when you have no power? All you would need then is a very modest UPS to take the strain while the automatic generator starts? No offence here OK? But what I am trying to say is, if you can predict when the power usually goes, then why not use a small generator, which would also give you light and auxiliary power? And a small generator may be cheaper than an UPS? Obviously, you would need to use a surge protector of some sort.

Also, having six computers to one UPS................what happens when the UPS fails? If you have two UPS you can have half the computers running in a power-out, or, all six if you can manage things for 30 minutes?

I assume from your original requirement that the computer are just for basic office work. My computer is .65KVA and I got an UPS of 1000 KVA to give me plenty of time to sort things out before the battery goes.

stay safe

babybear