Battery Selector

[dalejr03]

Does anyone leave the battery selector on 1 or 2 or 1 & 2 while connected to shore power? I am thoroughly confused what to do after reading 20+ posts and half say yes half say keep it in the off Position.

I am only able to use the boat on Saturday and Sunday. It stays in the water connected to the shore power 1 bank. I am going to purchase a splitter to have both banks 1 & 2 plugged in at all times since there is only 1 shore power tower to plug into at my marina.

[mmwjr]

You are talking two different things here. Shore power is AC voltage with line 1 and line 2. Typically line 2 is for the air conditioning only while line 1 feeds all other AC items, microwave, outlets, refrigerator, batter charger.

The battery selector switch is DC voltage for cabin lights, engine, radios, refrigerator when not on shore power. Leaving the switch on one battery lonely isolates the other battery from being discharged is something is left on. However IMO there is no need to leave the switch on either battery while away and shore power is on.

[dalejr03]

Thanks for the quick reply. When I connect shore power to bank 1 I don’t get the lights or microwave to turn on unless the battery is turned to 1, 2 or 1 & 2. I was under the impression that as long as I had the shore power connected it would provide power to those without the battery selector turned to 1, 2 or 1 & 2. If I am misunderstanding thanks in advance for the clarification.

[mmwjr]

The lights are 12VDC only so a battery needs to be on. The microwave needs shore power #1 and it’s separate breaker on.