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Old 12-12-2014, 12:19 PM   #8
Bohans
Veteran Member
 
City: Mooloolaba
Vessel Name: Ohana
Vessel Model: DeFever 72
Join Date: Jul 2011
Posts: 82
Engines are CUmmins NT 855 big cams...good motors and zero smoke after 60 seconds or so and run clean.

Gensets are 20kva Nothern lights. All recently serviced. But the alternators are not working on either of them which I find strange. I have one of these gensets in my current boat and the alternator works great. I understand they are hooked to a battery charger so alternator is not necessary but it is a great redundant system and not hard to get going or fix with a new one.

Another question I had was the inverter is hooked up to a 24v bank with 4 x 200 amp hour batts. So 400 amp hour capacity at 24 volts. It is charged by a separate 24 volt charger. At night the inverter powers all except air con ofcourse. But it keeps the freezers and fridges going and then in the morning run the genset to charge the 24v bank. I was wondering why neither main engine had a 24 volt alternator to charge the inverter bank. Or is it just accepted that we are going to run the gensets a lot.
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