Can anyone using the APC S10BLK (or S15BLK) UPS comment on how often the fan runs and what the noise level is like? If yes, can you also supply details of your application (rack/enclosure type, proximity to seating, % of wattage load, etc.)?
I e-mailed APC support and got the following:
- Fan will run when load is > 70%
- Fan will run when needed to cool battery, generally during charging (or > 70% load.
- Fan is "near silent".
The person assisting me is checking on a dBA spec for noise level as well as a temp threshold for activating the fan (but it is thought to be battery temp, not ambient).
Mods if there is a better place for this, please let me know and/or move.