A:AnswerI have not seen an F02 error on my unit but I did charge it before I connected anything to it. You also need to plug in the battery. The battery is in the unit but not connected.
I looked up the error and the APC troubleshooting guide says:
F02 = On-Battery Output Short
Troubleshooting Procedure::
Turn the Back-UPS off. Disconnect all equipment from the Battery Backup outlets and the turn Back-UPS on. Re-connect equipment one item at a time. If the output is tripped again, disconnect the device that caused the error.
I hope this helps.
A:AnswerDepends on the power draw of the system. I have one system that at load pulls over 400 watts from the wall and another that will pull less than 100 watts. it all depends on the hardware