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Old 07-03-2017, 06:34 PM   #1
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Is It Just Me

After being on the hook for three days and now back at the marina it seems that all my appliances and A/Cs work better on city power than gen power. A/Cs and Ref seems to cool better on city power. Could that be or is it just me...
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Old 07-03-2017, 06:47 PM   #2
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Could be the power factor and sine wave shape is significantly different. Need an oscilloscope to see the difference. Not worth the effort.
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Old 07-03-2017, 07:05 PM   #3
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Check your generator's voltage under load. A simple multi meter should be able to tell you. Could be that the rpm is low under load. You might also have a wiring problem. If the wire from the generator to your breaker panel is under sized, thst could explain low voltage. Some simple checking could turn up an easily fixable problem.

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Old 07-03-2017, 09:28 PM   #4
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Where is the generator? Is it adding heat to the hull city power isn't?
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Old 07-04-2017, 06:13 AM   #5
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It usually takes about a 12KW noisemaker to have a power output similar to shore power.

There is a lot less umph in the sine wave of smaller units.(Area under the curve)

Mostly heavy loads will notice , like air cond.

Similar results with inverters , the sine wave is better for big induction loads , but a cheapo inverter will still do fine if you can wait an extra minuet on the microwave , or coffee machine.
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Old 07-04-2017, 09:33 AM   #6
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It's perhaps a stretch, but is there any chance your generator is running at 50hz rather han 60hz? On many, it's just a non-descript lever on the injection pump that changes engine speed between 1500 and 1800 rpm. Maybe someone bumped it or switched it not knowing what it was.

A good multi meter will tell you voltage and frequency of the generator power, especially under load. Thats the first thing to check.
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Old 07-04-2017, 09:55 AM   #7
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Have the gen guy coming over during the week to check all out. Will then run on gen power for a day at marina just to see what happens. Thanks
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