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Old 12-11-2005, 02:09 PM   #1
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RE: 99 Alpine
Just returned from a local weekend rally.
When I turn off the chassis battery switch - the generator cranks & starts!!!!!!!!
The problem exists whether or not the shore line is plugged in.

Any ideas?
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Old 12-11-2005, 02:09 PM   #2
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RE: 99 Alpine
Just returned from a local weekend rally.
When I turn off the chassis battery switch - the generator cranks & starts!!!!!!!!
The problem exists whether or not the shore line is plugged in.

Any ideas?
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Old 12-11-2005, 03:57 PM   #3
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I BELIEVE THE 12 VOLT POWER FOR THE GENERATOR DOESN'T GO THROUGH THE CHASSIS BATTERY SWITCH. THE POWER TO START THE GENERATOR COMES FROM THE CHASSIS BATTERY , THROUGH A GENERATOR BREAKER , THEN TO THE GENERATOR. IF YOU WANT TO SHUT POWER OFF TO THE GENERATOR YOU WIIL NEED TO DISCONNECT LEAD TO THE BATTERY
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Old 12-11-2005, 08:35 PM   #4
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Shamrock,

See this link for a previous thread about generators starting when they should not.

http://irv2.infopop.cc/eve/forums/a/tpc/f/9686094452/m/880103976/r/880103976#880103976

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Old 12-12-2005, 12:38 AM   #5
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Usually generators are connected to the house battery bank not the chassis battery. I would recommend you be careful with having two sources of power connected at the same time. The transfer switch is supposed to take care of only selecting one but if it fails it could cause a more serious problem. Often We stay for mor than a month in a set up and I will start the generator but have the circuit breakers in the off position while exersizinge just the engine.
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Old 12-12-2005, 08:57 AM   #6
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Mike- Better for the gen life to unplug from shore power (or snap shore breaker off) & actually run some 110 load on the excercising gen. Puts motor under load condition to better excercise rings, & heats up gen windings (due to actual electrical demand) to drive off any moisture that has collected; both are better excercise than no-load condition. Air conditioner/heat pump is a good load for 20-30 minutes after 10 min. gen warm up.
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Old 12-12-2005, 11:03 AM   #7
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EMike, I agree that the generator should have a load on it, but I have never had a problem running both my engine(s) and the generator at the same time. I did it in the 70's with motorhomes and all of my boats for 22 years, both gas & diesel powered. There know seems to be some question as to being able to run both together. Do you agree and is this what we refer to as modern technology?
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Old 12-12-2005, 01:51 PM   #8
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If there are problems running main & gen engines @ same time, that's something broken that can and needs to be fixed.
I think the above is only about 2 sources of 110V (or 12V charging). Those also should be auto-compatible (and the 12V side has to be fixed if there's trouble there), but the 110V overhead of switching off the shore breaker is minimal to avoid the brain damage of "where's my power switched from today?" If you switch shore off, there's only the solar giving 12V if you have solar, and 110V from the gen. That way there is true exercise of the gen.
BTW, just switching off the shore breaker (staying plugged in) maintains the shore ground path (you lose that when pulling the plug) which leaves a safer situation, IMO. It includes neutral connection to the ground, which in most jurisdictions, are connected together ("bonded") at the pedestal; that way any unbalanced neutral load off the 220V gen power is drained to ground thru the pedestal.
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