Paralleling Yamaha 4500W and Honda 2000W

I'm familiar with pairing up for a 30a service, but not a 50a. (assuming that's what the OP has)

hsteinle wrote:
When I contacted Honda with the same question they said, 'no'. You have to pair units--even Hondas--that are MEANT to be Honda. But, that said--this came from Honda who of course would prefer you use THEIR product, so it might be possible to do this with an 'after market' set up--but I had no luck in finding such.

There is no "special" electronics in the Honda "parallel" cables, the only "special" item in the cables is the shielded plugs which prevent YOU from making a live electrical contact with the ends.

All synchronization work is done by the inverters inside the gens.

The problem however is there is NO "Guarantee" that a Honda inverter gen will be able to syncronize with a non Honda gen or a Yamaha gen will synchronize with a non Yamaha gen..

Put it another way.. Would you be willing to plug YOUR Honda or Yamaha gen into commercial power line and see if it synchronizes?

Basically that IS what you are proposing to do (Honda and Yamaha did not design the power grid).

Failure of the gen to synchronize WILL result in a dead gen..

The only sure bet is to only connect the generators which are RECOMMENDED by the same manufacturer together. They (the manufacturer) are the only ones to know what gens can be paired since they ARE the ones that designed and tested their configurations.

It is not a "conspiracy" by Honda or Yamaha to make you use "their products" together rather it is more in the lines that they did not design or test their gens for such proposed configurations..

At a $1000 plus per gen it is a rather expensive gamble to randomly pair non like gens together.

When I contacted Honda with the same question they said, 'no'. You have to pair units--even Hondas--that are MEANT to be Honda. But, that said--this came from Honda who of course would prefer you use THEIR product, so it might be possible to do this with an 'after market' set up--but I had no luck in finding such.

I would highly recommend that you send an inquiry to Honda AND Yamaha about this idea and see what THEY (THE MANUFACTURERS) say rather than potentially making expensive door stops using Internet hearsay..

I can see this now..

Manufacturer.. "Where did you hear that?"

You.. "The Internet.. They can't post anything there if it isn't true.."

Manufacturer.. " :E :S :h "

For a John Deere enthusiast... sell both and get 2 honda 3000i's and pair them. Or sell the Yamaha, and get two more Eu2000I's and pair all three of them, make sure one of them is a Honda Companion. 6000 peak, 3 x 1600 = 4800 watts continuous.

Always pair the wiring up first on all 3 or 2 units before ever starting one of the units up.

Common sense tells you that for warranty purposes, stay consistent with one brand of generator.

Moved from technology

Similar questions have come up before,
There's is usually somebody who claims it is possible
nobody has done it, and come back to post videos and info showing it is doable for the avg person
The usual answers are get a bigger generator
Or
Separate the electrical aka breakout the second a/c to be run off a second power cord