Power saving tips?

Using TrueNAS Scale here, and my main server has 24 drives in it. With the insane price of electricity here in the UK, due to rise again soon, i calculated around £90 a month to have it running and i'm really trying to find ways to minimise this. I know i could turn it off, but i host Vaultwarden, PiHole and Nextcloud amongst others, on an SSD pool which need to be accessible.

Are there any options for having the drives spin down at particular times of the day?
Will snapshots spin the...

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