Small Gennie Q

Submitted: Friday, May 13, 2005 at 12:34
ThreadID: 22962 Views:1863 Replies:6 FollowUps:4
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My last post on this subject and i did do a sort of search and didn't find my answer and i thought I'd ask you guys rather than the guys trying to sell me these things (as i always need to correct them when they quote specs to me so god knows i'm not going to trust them with an operational question).

Q - (easy yes or no) - with the smallish generators, typically the better made brand name ones, can you run the 240v function at the same time as the 12v charging function ? And if so, the obvious consequence I suppose is it just uses more power and a little more noisy yes?

thanks
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Reply By: Member - Crazie (VIC) - Friday, May 13, 2005 at 12:42

Friday, May 13, 2005 at 12:42
G'day Porl

I have a honda EU20i, it has the facility to run the 240v and 12v at the same time, no difference in the noise or running of the gennie, depending of what is plugged in of course. Also we had a $98 GMC at bathurst last year and i am sure it did it as well, but more noise than the honda.

cheers

Crazie
AnswerID: 111171

Follow Up By: macka - Saturday, May 14, 2005 at 22:22

Saturday, May 14, 2005 at 22:22
Hi Porl...We have a 1.8 kw Honda powered genny.(had it years.) Stright AC.. 2 plugs on front panel.. 1 for caravan/boat things. The other one for a 15A battery charer..Never had any problems with it Use it for M.Wave, electric kettle, toaster,heater /fan etc.. off road. 1long cable 1 thick polystyrene box on end of cable...exhaust pointing other way. It's a real Quiet genny,(to us) The genny chargers are usually about 6 amp..max..Regards
Macka17
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Reply By: Member - Geoff M (NSW) - Friday, May 13, 2005 at 13:11

Friday, May 13, 2005 at 13:11
My Honda EU10i will run both at the same time and dead quiet too.

Geoff.
Geoff,
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AnswerID: 111176

Reply By: shaggy - Friday, May 13, 2005 at 13:20

Friday, May 13, 2005 at 13:20
Porl,
The manual of my gennie 850W (gmc type) specifically says NEVER to use both 12 V and 240 V at the same time. It mentions something about black crispy humans if you try it and the two pieces of equipment do not like each others insulation method.
So I will NEVER try it, especially since I never ground the generator as is a must in the military. Big star pickets to the ground and moistening the ground if dry are needed to earth a gennie. Otherwise, as the saying goes "If you play with fire..."
Cheers
Shaggy
AnswerID: 111179

Follow Up By: Member - Geoff M (NSW) - Friday, May 13, 2005 at 13:38

Friday, May 13, 2005 at 13:38
Shaggy,
That's also a requirement for generators on a mine site, along with Earth Leakage (ELCB). (The coal mines in the Hunter Valley at least)
I would assume the military would specify ELCB too.

Geoff.
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Reply By: age - Friday, May 13, 2005 at 13:26

Friday, May 13, 2005 at 13:26
We must have different manuals as my GMC 850w manual states that both can be used at the same time as long as current draw is taken into consideration. I often charge a 12v battery as well as having 240v lights on for load. Plugs and leads are totally separated. Never fried me yet. Good idea about grounding though. We have used these little gennies for the last 2 trips to Fraser and expected they wouldn't cut it, but to our surprise they keep going strong (at that price we bought and take 2).

Cheers
AnswerID: 111182

Follow Up By: pjchris - Friday, May 13, 2005 at 15:01

Friday, May 13, 2005 at 15:01
What this means is that the generator uses the same windings to produce the 12v outpu as well as to run the inverter for 240v.
So you can only fully load one at a time. If you are running both at 50% of rated output that's as high as you can go.

The Honda generators have separate windings for the 12v and 240v sections of the Gennie so you can run both at full load.

Don't know about the Yamaha's or Kipor's.

Peter
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Reply By: Rob M- Friday, May 13, 2005 at 19:55

Friday, May 13, 2005 at 19:55
Without checking the manual i think that my honda eu20i says that you can use both at once, but can't use the " eco throttle " it must be running at full capacity.
Rob
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Follow Up By: pjchris - Saturday, May 14, 2005 at 00:34

Saturday, May 14, 2005 at 00:34
That's the same on the Eu10i. I think that because the 12v DC output is unregulated when the engine is running slowly on the eco throttle it simply doesn't put out 12v at any serious current and if you tried to draw the rated output you may end up buring out the winding...

Peter
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