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Old 03-24-2018, 03:33 PM   #21
Benthic2's Avatar
City: Boston Area
Join Date: Feb 2017
Posts: 1,918
But you can't really believe that its more efficient to run your genny with the heaters/air conditioners on and windows open just so the load goes up to 50%...getting a charger that will put the load in the prime range seems to be the best answer. If this was a drive engine, the answer would be to re-prop the boat so the majority of the usage is in the ideal operating range......matching the charger seems to be analagous to matching the prop.
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Old 03-24-2018, 07:09 PM   #22
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City: Gloucester, MA
Join Date: Jan 2013
Posts: 6,673
There also is a big difference between a generator that sometimes gets lightly loaded, and one that is always lightly loaded. As long as you mix it up, I think you will be just fine with light loading
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Old 03-24-2018, 08:08 PM   #23
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City: Cape May, NJ and Englewood, FL
Vessel Name: Irish Lady
Vessel Model: Monk 36
Join Date: Dec 2007
Posts: 4,025
I tried that route for over a year. The Honda is really only 1600 watts continuous. Anything over 1000 Watts gets pretty loud. Leave the boat with the genny on deck at your peril. Or worse in the cabin. It would not start my freezer box without first turning off Economy Mode. Would not handle even one air conditioner unit. So the Honda is back home and a $12.5K Phasor is back in the ER quietly running as it should. BTW, only 92 dB 12 inches from the unshielded block at full load!
Irish Lady
1984 Monk 36 Hull #46
Currently in Cape May NJ
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Old 03-24-2018, 08:29 PM   #24
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City: San Diego
Vessel Model: Helmsman 4304
Join Date: May 2016
Posts: 1,579
Load banks are used extensively for shore side industrial diesel generators, and many companies only do it annually to verify the system can handle all of the life safety loads in the event of a power failure. If they don’t have one integral to the system, a truck can bring one in for a day. I have never heard of one for a boat. I am late to the party, but seems the answers previously given make sense. Load it up as best we can, but not sweat it.
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