Good on OP for saving the environment with their power saving habits. For myself, I am selfish and love that sweet sweet swift wake from sleep on all my consoles. Even the ones I only use every once in a while.
I hate standby. I always stuff off my entire entertainment "block" outlet via a remote.
So my switch will always decharge and recharge daily if I leave it docked. Man what is Nintendo thinking?!
The Switch has pretty epic standby battery life, so leaving it unplugged overnight probably isn't much different than what the power management software in the Switch does when it's plugged in, letting it discharge a bit periodically, 'cause continually holding a lithium ion battery at 100% is bad for it.
Go ahead and switch off your connection to the grid, give your Switch a break from the continual power pressure overnight, and enjoy the fact that it'll still be at 90% power or so in the morning.
(I played Pokémon Shield last night in bed for a while before setting my Switch down on the nightstand and it's still at 74% as or this morning. The only time I've actually run out of juice is playing on a long plane flight, or leaving it on standby for, like, a week in a hotel safe while it periodically woke up and tried to talk to the bad hotel WiFi. The little bugger is a champ when it comes to battery life, and that's with a launch machine.)