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Re: charging on generator

Posted: Mon Dec 26, 2011 5:18 pm
by jkirkebo
LTLFTcomposite wrote:Hopefully someone like ingineer would weigh in on this, but I think there are two types of generators, ones that run at a constant RPM (3600? or 1800 for diesels?) to produce the 60hz frequency, and others that use the magic of inverters to allow the engine to run at variable speeds. I have a honda 5000w like construction workers use that falls into the former category, while the EU2000 and 3000 most of you are talking about is the inverter type. Don't the constant RPM generators put out a regular sine wave as they are like miniature power plants, while the inverter types only approximate a sine wave?
No, the constant RPM types produce a more or less "dirty" sine wave, depending on how "cheap" they are. The cheaper ones will have problems running some types of equipment.

The inverter ones, like my Honda EU65is, produce a very clean, near perfect sine wave. At least the expensive Honda ones does, what the cheap Kipor puts out I do not know. Supposedly the Honda puts out cleaner and better sinewaves than you get from the utility.

Re: charging on generator

Posted: Mon Dec 26, 2011 6:04 pm
by garygid
Given a schematic to a good full-sinewave inverter, it should be relatively
easy to determine if its internal clock can be synchronized to an external clock.

Re: charging on generator

Posted: Fri Jan 06, 2012 8:35 am
by Ingineer
I have a device that will allow hooking two Honda EU2000i's up together to allow charging at 240V / 12A. Unfortunately the 2000's don't quite appear to have enough "oomph" to run the full 240V 16A rate.

A single EU2000i will charge the Leaf at 120V 12A fine.

There are no problems with the waveform, nor will it hurt the Leaf's on-board charger or the EVSE.

-Phil

Re: charging on generator

Posted: Fri Jan 06, 2012 11:25 am
by DarkStar
Ingineer wrote:I have a device that will allow hooking two Honda EU2000i's up together to allow charging at 240V / 12A. Unfortunately the 2000's don't quite appear to have enough "oomph" to run the full 240V 16A rate.

A single EU2000i will charge the Leaf at 120V 12A fine.

There are no problems with the waveform, nor will it hurt the Leaf's on-board charger or the EVSE.
Are you running the EU2000i units in series or using a transformer? I thought they could only be paralleled. :?

Re: charging on generator

Posted: Fri Jan 06, 2012 11:39 am
by garygid
Apparently Ingineer made a synchronizer so that the two inverters would run in phase (or 180 degrees out of phase).
Might be correct?

Re: charging on generator

Posted: Fri Jan 06, 2012 2:36 pm
by Ingineer
Yes, it "tricks" the second genny into running 180 degrees out using the built-in paralleling mechanism.

-Phil

Re: charging on generator

Posted: Sun Jan 08, 2012 11:48 am
by DarkStar
Ingineer wrote:Yes, it "tricks" the second genny into running 180 degrees out using the built-in paralleling mechanism.
I've been looking at picking up an EU2000i so I'm extremely curious what the trick is. I know that the built in inverters will automatically adjust when using the parallel cables, but only provide 120 volts...

I gotta know what the "trick" is! :D

Re: charging on generator

Posted: Sat Mar 17, 2012 6:18 pm
by MarkBC
Just to bump this up the list, I also posted this question in the Engineering section. I got the Honda generator and need to modify the plugs to be able to charge the Leaf. I have learned that I need to connect the neutral and ground prongs for the EVSE GFCI check. However, it was mentioned that I need to connect via a 100,000 ohm resistor. Is this true?

Re: charging on generator

Posted: Sat Mar 17, 2012 7:34 pm
by Ingineer
MarkBC wrote:Just to bump this up the list, I also posted this question in the Engineering section. I got the Honda generator and need to modify the plugs to be able to charge the Leaf. I have learned that I need to connect the neutral and ground prongs for the EVSE GFCI check. However, it was mentioned that I need to connect via a 100,000 ohm resistor. Is this true?
The easy way to make this work is take a screw-on plug (NEMA 5-15P) and install two 1/2 watt 100k ohm resistors. One from neutral (silver screw) to ground (green), and the other from hot (gold screw) to ground (green). Then simply plug this into one outlet on the generator, and your EVSE into the other. This will safely pass the ground detect on the Nissan (and our upgraded) EVSE, while not being a hazard in any other way.

-Phil

Re: charging on generator

Posted: Sun Mar 18, 2012 3:18 am
by jkirkebo
If anyone needs a generator just for Leaf charging (and have a lot of money to spend...) they could just order an european EU30iS. This will deliver 230V 50Hz which the Leaf happily accepts.

Then get the EVSEupgrade EVSE, but without the 16A option. It will then deliver 12A@230V, which is 2760 watts. The EU30iS is supposed to be able to pump out 2800 watts continously.