[SOLVED] Can I use a higer rated VA UPS battery for my 600VA UPS

[Demoniacs]

I'm trying to replace my UPS battery. Currently it is a 600VA/390Watt and it's dying so I want to replace the batteries. I want to replace it with a 1000VA battery. Is it even possible?

 

[Pimpom]

In principle, yes, if the battery voltage is the same. It will take somewhat longer to charge the larger battery when it's fully or partly depleted. You'll get a longer backup time but it will not turn your UPS into a 1000VA unit.

 

[Demoniacs]

In principle, yes, if the battery voltage is the same. It will take somewhat longer to charge the larger battery when it's fully or partly depleted. You'll get a longer backup time but it will not turn your UPS into a 1000VA unit.

Please correct me if I'm wrong. This means as long as the load is no more than 600va/390watts, I can use a higher rated replacement battery? I'm only using it for cctv (40W) and power for 4 cctv cameras (15*4=60W), as well as a router (30W) and occasional TV (150W) for a total of 310W (guestimate based on internet sources), I should be fine.

 

[Pimpom]

Correct. Make sure that you have good electrical contacts at the battery terminals. UPSes are low-voltage high-current devices, similar to a car's electrical system. A 600VA load draws 50 Amps from a 12V battery - more when you include conversion losses. This is roughly comparable to the load on a car battery when it's cranking the engine.