J/30 Class Association Forums J/30 Forum The Boat, Sails and Equipment Battery selector switch

Rich - You are very fortunate if you have a breaker marked "Blender"! I would investigate that thoroughly and try multiple settings with multiple ingredients.

I do not believe the J/30 had an AC connection or battery charger as a factory option. I know many boats have them. I installed a Xantrex 10TB Battery charger. This particular model has two outputs to charge both batteries independently. It is diode isolated from the battery so does not discharge the cells when shore power is off.

The stock battery switch is a simple Off, Batt 1, Batt 2 or Both. It is manually switched. It should never be switched off when the engine is running as it will fry the alternator diodes. I usually leave it on Batt 1 on odd days and Batt 2 on even days. When the engine is run, I switch to both. Under my signature click on Projects & Documentation, then on the left menu select Rhapsody Maintenance Procedures. Check out some of the schematics and procedures I have posted there for the electrical stuff.

On Rhapsody the batteries are in a molded lip under the aft port quarter berth. They are tied down with traditional nylon webbing with buckle to tighten the webbing. Rhapsody has the old style layout. I believe your hull being newer has a different layout, so will defer to someone else that may have info on where the batteries are stored.