S9k is not supported.

Shuffling the profiles isn't needed, all you need is switch the power limit value, like this:

0 23 * * * sed -i 's/psu_power_limit = 1400/psu_power_limit = 900/' /etc/bosminer.toml && /etc/init.d/bosminer restart
0 5 * * * sed -i 's/psu_power_limit = 900/psu_power_limit = 1400/' /etc/bosminer.toml && /etc/init.d/bosminer restart