Leaving a Boat on Mooring

[camaraderie]

Sunforce Solar 5-Watt Battery Charger - Camping World
This will do the jobof keeping you topped up while on the mooring.

[hellosailor]

I would throw some mothballs in the cabin and engine space, to prevent corrosion and keep out critters. Coming back to a hornet's nest on your boat is NOT FUN. They also like to nest in booms, so stuffing some mothballs in the boom is also not unreasonable.

Beware most of the $25 solar panels, they are not waterproof and leaving them outdoors can ruin them. If you find a cheap one that IS waterproof...by all means let me know!

Conventional lead acid wet cells self-discharge and after more-or-less one month without use or charging they will take permanent loss, which can be prevented by either making sure you charge them every two weeks, or hooking up any kind of solar charger. They only need a trickle charge of some 30-50mA per day to compensate for the internal self-discharge, but they DO need it.