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Old 15-07-2012, 07:40   #1
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Invertor Generator and 30amp Charger

Question - I have recently replaced a 3500watt, 24 amp framed generator with a 2000 watt Yamaha inverter generator with 16amps.

I have it plugged directly into the boats system using the shore cord, with an adapter.
It's an adaptor going from 30amp to 110v house type outlet.

It runs everything, except the 30amp Guest marine charger.
It over loads it and cuts the power.

In the past - if 30amp shore power wasn't available - I've ran the charger using 110v shore power at the slip, with an adaptor and didn't have any problems.
So I don't feel that using s 16amp generator to power a 110v 30 amp producing charger, is the problem. (or, am I wrong ??)

Any idea what is causing this ??

Thanks,
Hatch
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Old 15-07-2012, 07:59   #2
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Re: Invertor Generator and 30amp Charger

The charger (30amp DC at approx 12vdc output) would draw about 3 amps from the 120v generator. This is ignoring any conversion losses and inrush as the charger comes on line. Still, it is such a small part of the 16a capability of the generator, I don't see why it shuts the genset down. Are you getting this shutdown even with all other 120vac devices turned off? If so, perhaps the genset is at fault. Others may have more authoritative opinions.
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Old 15-07-2012, 09:29   #3
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Re: Invertor Generator and 30amp Charger

I suspect that the charger is introducing harmonics into the AC supply that are causing the inverter generator to trip out.

Or the charger could be drawing much more AC than you think. With efficiency and power factor considerations combined, it could be drawing 6 amps AC at 110V.

David
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Old 15-07-2012, 17:54   #4
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Thanks guys.
Since reading your comments, I've rechecked the wiring and noticed that the fuse on the charger was a little corroded, upon unscrewing it, I broke the cap !!!

I'm going to replace the fuse housing or just put in an in-line fuse and then try using the generator again to see if that helped.

It was - at one time - charging the batteries, but only after I restarted it a second or third time !!
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