Generator Parallel Kit/Cable




Introduction: Generator Parallel Kit/Cable

Here is how I made a parallel kit for my Honda Inverter EU1000 and EU2000 generators. This should make a safe (no hot unshielded "suicide" plugs), cheaper ($55 vs $100+), easy to use kit to parallel your generator and combine your output.


1. I am a handyman, not an electrician or electrical engineer. So be careful and use this for your own knowledge, be careful, and don't blame me.

2. I Believe this only works on inverter generators, but is not specific to just Honda (should work with Honda, Ryobi, Generac, etc.)

3. Honda claims you can only parallel 2 identical models, I.e 1000 to 1000, 2000 to 2000 etc. But I believe it works fine with a 1000 paralled to a 2000

4. When I decided to make this Instructable, I had already completed the project without any pictures, so I did the best I could as a after thought.

Step 1: Supplies Needed


Pliers - Common Needle nose should be fine (or electrical pliers) to cut, crimp, and strip wires

Phillip head screw driver


1. Extension Cord 10-25 ft...14 or 16 gauge

2. 1 Gang Weatherproof Electrical Outlet Box with Three 1/2 in. Holes

3. Plug to match your need/wants...I used a 30 AMP L14-30 plug..another common is L5-30, various RV, etc

4. 2xScrew Cable Clamps (used to clamp wires coming into outlet box)

5. 4xBanaana Plug Connectors-4mm Fully Insulated

6. 2xInsulated Fork Spade Wire Connector (walmart, Auto Zone, Amazon...usually come in a pack)

7. ~4in of scrap wire (14 or 16 gauge)

Step 2: Assemble - Wire Cut/strip

1. Cut both male and female ends off extension cord (I left a few inches with the plug so they may be useful for something in the future)

2. Cut total length in half

2. On both lengths and both ends, strip back outer sheathing about 6 inches (be careful not to knick inner wire insulation)

3.On both lengths and both ends, strip each wire's insulation back a few millimeters (about the length of your finger nail)

Step 3: Assemble Plug/Box

1. Screw cable clamps to two opposite box holes (tighten inner lock ring and leave outer lock down screws loose)

2. Feed wire end through hole and clamp, leave loose and feed enough to work with

3. Repeat with second length and second hole.

**depending on the receptacle you want, next steps may change...follow plug instructions**

4. Attach wires to receptacle. Follow directions, black to hot, white to neutral, green to ground

NOTE: The plug I used is a 220v L15-30 plug. My
house is already wired for input with this plug for my large generator that puts out 220v. This parallel conversion allows ease of use to plug one or two small generators into my house with this same plug/cable etc, ##BUT## Most 1000-3000 watt inverter generators do not put out 220v (only 110v), and there is no reasonable way to make a small generator put out 220v. You simply need a bigger generator.

**If you want to use a 220v outlet like me, attach both black wires to "hot" attachment screws (sometimes simply brass), both white to neutral spot (silver screw), both green to ground (green screw), then use a 4" "jumper wire" (scrap wire is fine) to connect each brass/"hot" screw to each other (so both wires have an equal feed/load). **BUT you will still only have 110v available, so if you use any 220v appliances (i.e. most A/C's, electric hot water tank, Electric dryer/stove etc) you will severely damage them or cause injury.**

5. Push attached outlet into box (pulling on outer wires will help). Screw outlet and sometime the cover at the same time into box. Pull outer wires until somewhat snug, if you pull too hard you will rip wires out of outlet.

6. Tighten cable clamps until snug.

Step 4: Final Step: Assemble Generator Ends

1. Wires should already but stripped and ready to go. If not, do so.

2. Attach banana clips as shown. I am terrible at soldering, so I simplely made sure the wires were snug and secure.

3. Ensure black clips attach to black wires on both sides, and red to white wires. Note: Honda claims it doesn't matter, but better safe then sorry

4. Attach fork to green wire and crimp with a crimping tool or strong pliers (ensure wire is snug in place)

That's it, you are good to go!

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    1 year ago on Step 4

    Update. July 2021. Just added a generator hookup in garage. Energy output display pictured on side of e2000 is a DIY unit from ebay added by me. Also have on on my e3000.

    Also note: I changed out the outlets on my Honda e2000 and e1000 (not shown) with store bought 120 outlets(see pic). Replaced with a high quaility weather resistant GFCI. Orginal outlet on my e1000 was loose, decided to upgrade, works fine, I **want to believe** a GFCI helps? But not sure. Doesn't hurt?


    Question 4 years ago

    I have a 3000 watt inverter I want to plug a L14-30 220v generator plug into. The inverter has two International 220v outlets. How can I connect a L14-30 socket to the inverter?


    Answer 3 years ago

    What you want to do is not possible. The 220VAC output does not provide a neutral, so you can't get 120VAC out of it. If you did wire it to an L14-30, it would only work for 240VAC appliances.


    Answer 4 years ago

    My best idea is something pretty similar to what I have here but with the correct international plus (6-15P plug?) on one end of a heavy cable and the L14-30 on the other

    -Buy a replacement (or salvage/cut a cord of something to use) 6-15P plug that you can rewire.

    -Buy a L14-30 plug (either stand alone, or put in a box like mine)

    -Since your inverter puts out 220v and you want 220v, just wire as the instructions say

    Shouldn't be too hard


    4 years ago

    How do you account for synchronization of the load between the two generators and overload of one vs, the other.

    Great Instructable! I was hoping for the electronics you used in the kit.


    Reply 4 years ago

    I use a Honda 1000 connected to a Honda 2000. They seem to auto level ok on their own (but I really don't max it out). I added voltage/amp/hertz/watt meters on both generators...something like this (several different varieties)

    Used Dremel to make hole in outer shell...little tough to fit right...but works great...reads instant watt draw...Great for keepsing an eye on capasity


    5 years ago

    Good first instructable! Thanks for sharing :)