Marionette has a 4 hp outboard in a transom well. She has no generator capability on board save a small portable solar panel. There is not much electrical demand - the boat has a full set of wired 12v electric lights but sleep comes early and the oil lamp light is preferred. The following set up works for a week or more of cruising before recharging the house battery is necessary. The major user is the autopilot when single handing, and using the 110 inverter for charging cell phones and running laptops.

Marionette carries 1, Group 31, 105 amp, absorbed glass mat (AGM) battery mounted at the forward, inboard end of the starboard quarter berth locker. In this locker is mounted (with wing nuts) a 'smart' portable 110v charger. The battery is strapped in its corner with wedges to tension the strap. The top of the battery has a press fit block between it and the inside top of the locker so it cannot move. There is clearance above the battery for the battery charger clips. The battery has a carrying strap (its heavy - 70 lbs!).

This is the forward starboard quarterberth locker with the access panel removed. The battery is underneath - the + sign marks the location of the positive terminal under (I can connect these blindfolded). The battery charger is mounted at upper left. When not in use I clip the charger terminal clips on the strap holding the battery in place. The wood block is a tensioning spacer. The black cable is the charger cable. The red cable is the extension cord. Barely visable in the lower left hand corner is a 30 amp one piece locking adapter. At a slip we can connect to shore power with extension cord and use the surge protector for multiple outlets

Normally, the battery is charged from shore power using a 50' heavy duty extention cord, also stored in this same locker. This set up is so that when cruising and impossible, or too expensive, to get to a slip with power, or unable to tie up at a transient dock long enough to charge the the battery, it can easily be loaded in the dinghy with its charger and brought to a friendly shore that has a 110v outlet that you can use.

Notice the wing nuts

Notice the wood wedge to hold the battery down