> We've had a APC 7.5kVA Smart-UPS running for about 3 years. It runs
> about 30% of capacity and has only been run on batteries for more than
> a few seconds once or twice.
>> Question is, when should we replace the batteries? And is there a
> better way to measure battery life than turn off the power and see how
> long it runs on batteries?
Save yourself time and effort and replace every three years as per APC's best practice. It doesn't matter how many times it has had to be used, it is just down the battery age.
Regards - Terry
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