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Old 10-02-2005, 12:41 AM   #1
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Can you link a EU2000i with a EU1000i?

I am sure this has probably been beat to death a gazillion times, but I can't seem to find it in a search. Can you link a EU2000i with a EU1000i just as if you were connecting 2-EU2000is? I have been running my 11K a/c on my 1999 25' Safari for 2 1/2 years. It is very marginal and would like to have that little extra I could get from the 1000. Thanks
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Old 10-02-2005, 07:29 AM   #2
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Short answer, NO. According to Honda you can link 2 EU2000i's together. There is not that much of a price difference between a 1000 and 2000. I do not think you can even link 2 1000's together or even 2 3000's.
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Old 10-02-2005, 10:25 AM   #3
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Honda has cable kits for the 1000, 2000 and 3000 models. You can not mix and match, the two units must be the same.
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Old 10-02-2005, 01:38 PM   #4
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To explain, ....

If you try to hook up a 1000 and a 2000, the lower rated generator will cut out, because, of course, it is rated lower, and will protect itself when it see amps and watts go over its rating, leaving the larger unit to shoulder the burden by itself.
You can't even hook up a horse and a mule for the same reason.
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Old 01-28-2008, 07:59 PM   #5
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It is the same issue like using 100% bio-diesel, towing with close to 100% capacity, or towing car with 4 wheels down.
Manufacturers don't recommend it because there is no money in it for them, so why take a risk? Lot of owners do it successfully regardless.
Lot of good technical advice on the subject on rv.net forum.
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Old 01-28-2008, 08:11 PM   #6
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Quote:
Originally Posted by Raptorrider2001
I am sure this has probably been beat to death a gazillion times, but I can't seem to find it in a search. Can you link a EU2000i with a EU1000i just as if you were connecting 2-EU2000is? I have been running my 11K a/c on my 1999 25' Safari for 2 1/2 years. It is very marginal and would like to have that little extra I could get from the 1000. Thanks
No. You need two 2000s. The 1000 will try to keep up with the 2000 and fail.
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Old 01-28-2008, 09:03 PM   #7
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The generators will not share proportions of the load. If you have a 2000 watt load, the 1000 will be going flat-out, and the 2000 will be loafing at half-load. if you exceed 2000 watts, the 1000 will overload and shut down to protect itself, quickly followed by the suddenly-overloaded 2000.
This is the same reason you can't (or shouldn't) use a pair of battery chargers on a single load (battery), the lesser-capacity one will be the weak link.
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Old 01-28-2008, 09:22 PM   #8
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rewire and dedicate one genny (2k) to your ac and let the other take care of the rest
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Old 01-29-2008, 09:19 AM   #9
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I actually Googled the topic and waded through some threads on RvNet forum and found some people who have claimed, what I would consider to be rather limited success, at linking two different generators by using some 'homemade' cables. I surely didn't see anything that would compell me to conduct experiments on any kind of generators, or my Airstream. I'd spend the extra dime and do it right.
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Old 01-29-2008, 11:20 AM   #10
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Nothing in that thread stated that posters were qualified to be making such modifications or claims. If anything, all I saw was "It works, but I'm not sure why".
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Old 01-29-2008, 11:33 AM   #11
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Suggestion....

Let's keep it constructive.
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Old 01-29-2008, 01:52 PM   #12
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The bottom line is "Not recommended or approved by the manufacturer". Use at your own risk and don't come crying, when you burn something up.
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Old 01-29-2008, 03:56 PM   #13
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For the sake of discussion—
If I had a 1000eui and a 2000eui and the equipment to place a variable load on each unit, I would record output voltage verses current on each unit from no-load to full load. Then I would test under 2 assumptions (I know the definition of assumption )
1) Hondas have been shown to frequency match between two different size generators and
2) the big guess… Inverter technology will react to loads similar to conventional low tech generators.
For example – at a known load, a low tech generator will output a known output voltage, no load on my coleman is 130 volts, full load is 115 v. (pretty crappy)
Let’s say the 2000eui put out 800 w at 124 volts and the 1000eui at the same voltage is 300 watts. Testing the two tied together at 1100 watts should be 124 volts.( That would be the test for the theory )

Where things fall apart is if the curves are miss-matched, such as a 2000 at max load is 120 volts and the 1000 is 122 volts. The 1000 will trip out at 121 volts and the 2000 never got fully loaded.

This is all based on how I understand the inverter technology units work but, then again, I don't have one!
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Old 01-29-2008, 06:14 PM   #14
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Hmmm...when the manual says not to parallel unlike models or types of generators, I think it's probably prudent to heed the instructions. Just because some folks have done it and it seems to work "just fine" for them doesn't mean that they don't run a heavy risk of damaging appliances, electical systems or generators...or that one day or after extended use they won't find out why it's not wise. Just my opinion, but then I tend to follow instructions when operating equipment.

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