I’m still looking at moving the charger further over and housing it in a cabinet due to the cable not locking in place. I’ll seal around the back of the cabinet and add some drain holes in it just in case!.
Many years ago when I used to make fishing bite indicators for Daiwa and model boat speed controllers I used a PCB dip, looked like petrol, this meant the boards would work under water but were perfectly serviceable for repairs etc. unlike encapsulating them in epoxy etc. Unfortunately I no longer have any 🙁
Please excuse spelling/typos. Apart from being a clot it turns out I had one on my cerebellum that's now causing various problems!