I have a Honda 6500 that I can plug into the electrical panel.  The transfer switch/extra panel was installed by an electrician.  The plug from the generator has the 4 prongs pictures below:



In addition, I also have a Honda EU2000i.  I’ve been reading that you can connect a second generator to get 220V (the Honda 2000 and 2200 are only 120V) so I can run my well pump which is 220V.  The Honda 6500 can run the well as it has 220V.  

I did check the serial # range to make sure I could connect it to a 2200 which it is.

1) Has anyone connected 2 Honda 2200’s or 2000’s or combinations?

2) The outlet on the front looks like it is 3-pronged.  Is there a way to use an adapter to connect it to the 4-pronged outlet?

Yes you can get an adapter (Amazon etc..) and NO you won't get 240V from parallelng two 120V generators

@ODS9091

Got it.  So I will get the total watts but no voltage change.  

Do you know about an adapter to connect the generator to the 4-pronged outlet as with the cord pictured in the OP?

They make bridged adapters to connect 120v generators to a 240v inlet.  This gives 120v to all legs, but you need to flip off any 240v breakers as those won’t work.  

Correct..as for the adapter click the link  (Amazon)

Thanks guys.  I’m reading all the answers.

The only thing that uses 220V is the well and I can leave that breaker in the off position.

Here is my setup.

240V male inlet box connected to panel.

Two hots bridged L14-30 to 120V TT-30 RV cord adapter



This lets me apply 120V to both sides of the panel, but all 240V breakers must remain off.

To get 240v the 2 gensets will have to be connected electronically somehow to phase properly. For 220v the 110v legs need to be 180* out of phase.

7 or 8 years ago there was a big thread here about contacting inverter gensets to couple 180-degrees out of phase to get 240V. One guy said that he and a friend were actually working on a solution for that, but he never came back and told of success so I suspect they failed or ran out of motivation.

I used to think it could be done easily but as I've learned more about how they parallel them I don't think it can be done easily. It could possibly be done getting into the brains of the inverter but not with a cord. Best bet is to get a 1:2 transformer that can be center-tapped. That would be cheaper, just make sure to size it for the in-rush of the well-pump or other large loads.

Here's what I did:




120V to 120V/240V transformer.  I picked up an EU2200i and my plug adapter shows up tomorrow, so I should be able to get some pics of the paralleled setup.

Here is a pair of paralleled Hondas with the transformer.  It worked well for resistive loads.  The generators stumble when trying to start a 1.5 hp or 2.0 hp electric motor.  They ran the motor(s), but getting them going was rough.  



Input voltage



Output voltage



Noise @ 21ft under 3000 watt load:



For comparison, noise from a MEP-802a at the same distance and load. (same for 5000 watt load)

@Rock_Ranger

Great post.

How much are those transformers?

Typically around $400 new, but you can get them much cheaper off CL or Fleabay.  I have three ranging from 2kw to 6kw that were removed from used industrial equipment for free.  You just have to read the data plate to figure out what you have.  They are referred to as Buck/boost or step-up transformers.  You want to find one that takes 120V on the primary side and outputs 120/240 on the secondary side.  Some can be wired for either 120v or 240v on the primary.  If it has 4 wires on the secondary, it can be configured for 120V/240V or 120V only with 2x the amperage output.

Another nice thing about transformers, they can be used to balance the load between the two legs of your home.  A typical 120V/240V generator can only provide half it's output to a single phase.  With a transformer,  you can draw evenly from both legs of the generator and funnel the full output to a single leg of the house if need be.  (transformer would need to be rated for 2x of your generator output)

Got it.

It looks like Acme discontinued the unit I'm using, but you can see it here for reference.


Here is the wiring sheet.  Look at wiring diagram 13 to get an idea of what to search for.