I have l5,000 btu air conditioner on our rv. Went to Nascar race last week and saw alot of rvs with (2) 2000 watt generators parallel together. Talked to several people who were very pleased with the set up. Can run one just for lights etc. and start up second generator to power the air conditioner when needed. I forgot to ask the people I talked with if they had a 13.5 or a 15m btu. I talked to Honda and Yamaha directly and they will not guarantee that the generators can handle the amps needed to start the 15 m btu air conditioner. I'm hoping someone reading this forum might know or have the same situation. We are using a very noisy and heavy generator but wanting to change. Thanks!

Hi Charm,Yes, it is possible to run just one for lights and etc.Quite a bit depends on the altitude at which the camping is done. The higher, the less load the genny can support.Another route is to get a hybrid inverter that will support the start up load.

We have a 15,000 BTU A'C unit and I use 2 Honda 2000i when we need the A/C. If no A/C is needed then only one Honda 2000i is used.It's a great setup and relatively quiet. You can carry on a conversation standing right next to them.I used to have a 6500 watt generator and when I started it up, campers in sites on either side of us would go inside their RVs.

Yes. 2 honda 2000's will do it.

pianotuna wrote:Another route is to get a hybrid inverter that will support the start up load.What I would like is to have that built into the inverter generator. Yamaha makes (or made) one and I believe it just uses the internal starting battery that gets coupled to the inverter to increase amperage for about 10 seconds. They only did it on a 3000 watt model but I wouldn't mind having it on something a little lighter.I'd even be happy with a couple of terminals to attach my own battery.The hybrid inverters I have seen for RVs are nice but more than I need and cost as much as another 2kw inverter generator.Mike

Hi TIn,I have the Yamaha 3000 sIEB. It struggled in Cranbrook, BC Elevation, 921 m (3,021 ft) to start a 13500 btu ducted Dometic. Granted the genny had less than 20 hours on it. It purportedly does a 500 boost over the 2800 VA.Since I got the hybrid inverter ($1700.00 including the remote from Imarine), I can run the generator in eco mode and start the air conditioner easily. Although I have not tried it, my opinion is that with the hybrid inverter a single 2k inverter genny would be enough to run a 13500 btu air unit, using the load support feature of the inverter. The hybrid inverter is useful in a host of other ways--for example I can "dial it down" to the maximum 23 amps that the Yamaha can provide, or I can limit it to 15 amps if I'm on a standard wall outlet at some one's home. No more worries about blowing a breaker and knocking on their door for a "reset".One of my pet peeves is that the genny makers advertise VA instead of real honest to goodness watts. The inverter folks are in the same (leaky) boat.TInmania wrote: What I would like is to have that built into the inverter generator. Yamaha makes (or made) one and I believe it just uses the internal starting battery that gets coupled to the inverter to increase amperage for about 10 seconds. They only did it on a 3000 watt model but I wouldn't mind having it on something a little lighter.I'd even be happy with a couple of terminals to attach my own battery.The hybrid inverters I have seen for RVs are nice but more than I need and cost as much as another 2kw inverter generator.Mike

Honda or Yamaha (2) 2000 Watt generators parallel together

Larryect
Explorer
Jun 05, 2015
TInmania wrote:
Larryect wrote:

Probably apples and oranges. I have a 2400 and it does a great job. But it is not set up for parallel operation. My understanding is that the engine on it is over-sized and the same one they use on a larger unit - I think the 3kw.....

It has started and run my 15k AC. But it and the AC unit struggled, and it had no head room left.....

In fairness it is advertised to run most 13.5k ACs so just running a 15k ain't bad.

And, yes its 171cc engine is the same as in the ef2800i as well as the ef3000i models. Presumably the alternator and/or inverter portion is better as you move up the product line.

Mike

Correct. Not complaining at all. It ran my 13.5 fine with the hard start kit. Wish I could parallel it with a 2000. That would be sweet.

As it is I am trying to decide what to do next.... actually hard to justify changing currently because we normally frequent parks with hookups.

Maybe I wasn't being clear before. You were comparing surge capability of 2kw units with your experience of larger units having good surge capability. That may not carry over for the 2 kw units as their engines may be sized closer to their ratings.....
TInmania
Explorer
Jun 05, 2015
Larryect wrote:

Probably apples and oranges. I have a 2400 and it does a great job. But it is not set up for parallel operation. My understanding is that the engine on it is over-sized and the same one they use on a larger unit - I think the 3kw.....

It has started and run my 15k AC. But it and the AC unit struggled, and it had no head room left.....

In fairness it is advertised to run most 13.5k ACs so just running a 15k ain't bad.

And, yes its 171cc engine is the same as in the ef2800i as well as the ef3000i models. Presumably the alternator and/or inverter portion is better as you move up the product line.

Mike
SoundGuy
Explorer
Jun 05, 2015
gmckenzie wrote:
Just a comment for those of us north of the border that the Cdn versions of the EU2001 cannot be ganged together.

Well yes and no ... Cdn versions don't have the factory installed parallel ports but all they actually do is connect the output receptacles of each genset together. Use your imagination and I'm sure you can figure out how a couple of Cdn EU2000i gensets could in fact be "ganged together". ;)
Larryect
Explorer
Jun 05, 2015
TInmania wrote:
ScottG wrote:
While I'm not a big fan of Honda's gens, a recent test run by a buddy and I showed that the Honda has a lot better surge capacity than the Yami. The difference was dramatic.
He ended up selling it on fleabay and is looking at getting something else.

I can only speculate that was a fluke. I have seen many tests showing Yamahas testing well above the rated surge capacity.

The EF2400i is rated at 2000w with 2400w surge. Hayes equipment tested one: "Load bank tested to hold a 25 Amp load* for up to 10 seconds. That's 3000 Watts of surge capability."

That is quite a bit higher than advertised.
http://www.hayesequipment.com/yamaha_generators/ef2400is.htm

My EF2800i seems to also put out a little more than its surge rating--or even normal rating. I have had it running my 13.5k btu AC while running the microwave, with the fridge on AC. Normally I would run the fridge on LP but had forgotten. But it easily runs the AC and 900w microwave (which draws over 1300w),

Mike

Probably apples and oranges. I have a 2400 and it does a great job. But it is not set up for parallel operation. My understanding is that the engine on it is over-sized and the same one they use on a larger unit - I think the 3kw.....

It has started and run my 15k AC. But it and the AC unit struggled, and it had no head room left.....
gmckenzie
Explorer
Jun 05, 2015
Just a comment for those of us north of the border that the Cdn versions of the EU2001 cannot be ganged together.
TInmania
Explorer
Jun 05, 2015
ScottG wrote:
While I'm not a big fan of Honda's gens, a recent test run by a buddy and I showed that the Honda has a lot better surge capacity than the Yami. The difference was dramatic.
He ended up selling it on fleabay and is looking at getting something else.

I can only speculate that was a fluke. I have seen many tests showing Yamahas testing well above the rated surge capacity.

The EF2400i is rated at 2000w with 2400w surge. Hayes equipment tested one: "Load bank tested to hold a 25 Amp load* for up to 10 seconds. That's 3000 Watts of surge capability."

That is quite a bit higher than advertised.
http://www.hayesequipment.com/yamaha_generators/ef2400is.htm

My EF2800i seems to also put out a little more than its surge rating--or even normal rating. I have had it running my 13.5k btu AC while running the microwave, with the fridge on AC. Normally I would run the fridge on LP but had forgotten. But it easily runs the AC and 900w microwave (which draws over 1300w),

Mike
SoundGuy
Explorer
Jun 05, 2015
Huntindog wrote:
There is a mod that can be done on the Hondas to allow them to be run out of fuel like the Yamahas.

Not really a mod per se, just disconnect the 2-pin connector that feeds the Honda's common fuel / ignition switch ... when you turn the switch off to kill fuel flow the switch is electrically disabled from killing the ignition so the engine continues to run until it runs out of fuel. For occasional use just pulling this connector apart works just fine but for those that would want to do this regularly installing a simple toggle switch in the wires would make it much more convenient. I've disabled my first EU2000i many times and doing so works exactly as described but I've not bothered with the one I have now as I run it using only SeaFoam treated non-ethanol gas and run the genset every couple of weeks so fuel gum up hasn't been a problem for me.

I've owned 2 EU2000i gensets and there's no question the Honda with it's 20% larger engine offers much better surge capability than does the Yamaha EF2000iS. For any who doubt just how capable the EU2000i is there are several YouTube videos out there, this being one ...

Honda EU2000i (Over)Load Test

In another recent discussion it was also mentioned that the Yamaha EF2000iS is NOT recommended for use with the Progressive Industries EMS units and warranty coverage for any damage caused when doing so will be denied by the manufacturer ...

Progressive Industries EMS / Yamaha EF2000iS Disclaimer

Obviously one could side step this issue by disconnecting the EMS or bypassing it when powering from the genset, or installing a transfer switch, but I'd still consider this a drawback to the EF2000iS compared to the EU2000i since there's no similar disclaimer for Honda's EU2000i. However, even for those not using any type of electrical management system OR for those who do but bypass it when running on genset that still doesn't address Progressive's main concern about the EF2000iS ...

"Please be advised the Yamaha Generator Model EF2000iS does not generate enough start-up current which causes the unit to overload. The generator then puts out non-true Sine Wave power. Progressive Industries units are designed to operate only on a True Sine Wave."

Presumably Progressive wouldn't make this statement on their own website if they'd not investigated thoroughly, the point being that if the EF2000iS, which is advertised by Yamaha as a true sine wave inverter, in fact does not generate true sine wave under ALL circumstances then I'd be really concerned for some of the electronics in my trailer. Based on this alone the Honda EU2000i would seem to have the clear advantage.
Huntindog
Explorer
Jun 05, 2015
My Hondas have run my 15K at 9200 ft. Not sure just how much they had left, and it wasn't super hot out, but hot enough to make us want the air. Of course it doesn't really get very hot at that elevation.
I do have them jetted for higher elevations.
Huntindog
Explorer
Jun 05, 2015
Bionic Man wrote:
I have used my parallel Yamaha generators to run my 15k AC at home (close to 6000'). They can do it, but I don't think they would handle much more.

I really like my Yami's, but I think if I were doing it again I would go with Honda. It is my understanding that they have a fuel pump and are easier to use an extended run tank with.

The advantage of the Yami's is the fuel shut off. Easy to run the carbs out of fuel and not worry about them gumming up.
You hit the nail on the head.
There is a mod that can be done on the Hondas to allow them to be run out of fuel like the Yamahas. I haven't bothered with it, as I use mine so often that fresh fuel isn't a problem.

So I feel that light users may be better off with the Yamahas, as the fuel shutoof is likely a feature they need, and the extended tank is likely not.

Heavy users will likely appreciate the extended run capability of the Honda and not miss the fuel shutoff at all.

This is for "stock" generators.
If one is willing to do a simple mod of installing the fuel shutoff on the Honda, then it wins easily.

Your money, your choice.
Huntindog
Explorer
Jun 05, 2015
smkettner wrote:
TInmania wrote:
The hybrid inverters I have seen for RVs are nice but more than I need and cost as much as another 2kw inverter generator.
Yes exactly. Skip the second Honda and get a small Victron Multiplus.

Less set up and maintenance with just one generator.
Also have inverter to watch tv etc when the generator needs to be off.
I camp a lot in remote areas. Upon setting up one time, The pull cord on one of my Hondas broke, and dissappeared inside. I was sure glad I had another Honda with me. Saved me an entire day and a tank of fuel running arouns after parts when I wanted to be hunting.

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Honda or Yamaha (2) 2000 Watt generators parallel together

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