Olivergm wrote:
So just behind the red battery selector as you step from the transom into the seating area?
Weird place to put it but at least that should be easier to get to than in the engine room.
Yes, the battery switch on mine is mounted to a small panel with a couple circuit breakers, four screws and the whole panel comes off.
This is how I went about it: boat running both, batteries @ 14v. Boat not running, nothing on, both batteries @ 13.2v. Plug in shore power, one battery @ 14.4v and the other at 13.2v, both green 'ready' lights were lit on the charger. My GPS has a voltmeter so its easy to see whats going on.
So I did some research into the Guest 2x10 charger and a lot of people said it has internal fuses, I took apart whatever I could and saw nothing related to fuses. So I disconnected both batteries, with the charger plugged in only one batterv was getting voltage measuring off the disconnected positive terminal. Both red wires out of the charger were getting voltage so I followed the wires from the charger assuming they went right to the batteries, but the wires went to the battery switch, when I pulled off that panel there were three inline fuses, two from the charger and one smaller one to the cig lighter plug on the panel. One of the 15A fuses from the charger was blown, replaced it and all is well for a season.
The 12v acessories do not run directly from shore power (unless they are plugged into an AC outlet with its own transformer), they run off the battery and the battery charger is supposed to keep the battery up to charge. Naturally if you have a 10 amp charger and are using 20 amps worth of 12v power the charger cant keep up and you will start draining the battery.