07-24-2023, 11:13 AM
I moved away from APC to Cyberpower for two reasons. I still keep one big APC and one small APC (both simulated sine) but the rest are Cyberpower (pure sine).
(1) On the older APC model I have (BACK-UPS Pro 1500), the battery test feature always causes the loud fan to turn on and run for the next six hours or so. I presume that this is to cool the battery and charging circuitry after the load test while it is topping up the battery. Since I have retrofitted only an external battery on this one, the noisy fan is for the internal circuitry only.
(2) The serial port for USB to connect to a computer is RJ-11. That will only work with a specially wired RJ-11 to USB cable. Common USB B to USB A cables won't work here. Lose that factory cable and you'll have to find an overpriced replacement somewhere.
If APC has solved these annoying issues in newer models, I may go back to APC.
I really like that the APC model I have has a dedicated socket to connect an external 24V battery to extend its runtime. I found it convenient to replace the lead acid batteries with higher capacity and longer lifetime LiFePO4 batteries.
(1) On the older APC model I have (BACK-UPS Pro 1500), the battery test feature always causes the loud fan to turn on and run for the next six hours or so. I presume that this is to cool the battery and charging circuitry after the load test while it is topping up the battery. Since I have retrofitted only an external battery on this one, the noisy fan is for the internal circuitry only.
(2) The serial port for USB to connect to a computer is RJ-11. That will only work with a specially wired RJ-11 to USB cable. Common USB B to USB A cables won't work here. Lose that factory cable and you'll have to find an overpriced replacement somewhere.
If APC has solved these annoying issues in newer models, I may go back to APC.
I really like that the APC model I have has a dedicated socket to connect an external 24V battery to extend its runtime. I found it convenient to replace the lead acid batteries with higher capacity and longer lifetime LiFePO4 batteries.