Going to away from home for a month. RR in locked garage. Should I leave my Cetek charger connected. ? 2013 SDV8 4.4 SE Luxor.
1960 Series 2 88 inch diesel.
1955 Series 1 86 inch petrol.

I quite often leave mine in a locked garage for periods of time. What I’ve found is that if the car is locked it needs the CTEK, unlocked it doesn’t. Either way, it’s no effort.

It won't do any harm to leave it connected but it could be a ball ache if you come back and it's flat for some reason, so if you've got one, I'd be connecting it  2002 4.6 Vogue SE - Alveston Red with Lightstone Leather
2007 Range Rover Supercharged in Java Black with Ivory Leather
2012 Range Rover 5.0 SC Autobiography in Indus Silver with Jet/Ivory Interior
2012 Range Rover 4.4 TDV8 Autobiography in Baltic Blue with Sand Interior

I’ve had a CTEK connected to an old Land Rover for about a decade, only taken off very occasionally to give it a run - no issues.

That is exactly what it’s designed for.

Tie something around the steering wheel to remind you the car is connected when you return...  Pete
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2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
2002 L322 Vogue 4.4 V8 Epson Green, Ivory over Aspen Interior (Fatty Offroader) Sold
-Click for Project Fatty off roader-