So what would you advise for use in a basement at steady 65F year-round but humid during the rainy season (Bay Area)?I see it as an advantage, if you break something it's likely to be the stud instead of the cell terminal
It is a real problem. Now, is it a problem here? hard to tell. Also, it depends on a lot of factors, main one being humidity. On a boat it'll definitely be a problem, and in a house in the desert it'll definitely not. For cases inbetween it's complicated.
Personally I'd say if it's in a house in a non-tropical area then it's fine. If it's in a tropical area, or in the basement, or in a vehicule I'd say it would be wise to take precautions against it. But that's only an educated guess, YMMV.
Between stainless, brass, zinc-plated or aluminum and posts (grub screws?) or bolts, I’m a bit lost as to the most reasonable thing to do.
Also, as far as the zinc-based paste to use to protect the aluminum terminals from oxidation, I’ve understood that that is a good idea regardless of environment & fastener solution but a specific product recommendation would be appreciated (never used the stuff before).