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Old 10-10-2016, 10:27 PM   #1
Stu-L
Member
 
City: Huntington Beach, CA
Country: US
Vessel Name: Great Escape
Vessel Model: 1981 Californian
Join Date: May 2012
Posts: 23
Battery Isolator

I have twin Perkins 4-236 in my boat. I use one 4D starting battery to start both engines. This battery is charged by the port engine. The starboard engine charges the house bank. I have a battery switch that is wired to put all batteries on line for starting if needed. When all batteries are on line both alternators are charging all the batteries. I have been running with all batteries on line after starting. Yesterday I found that the alternator on the port engine was very hot when running. All batteries were on line. I think I blew a diode. I wonder since both alts are charging and not isolated could I be putting a strain on the alternators?
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