Yamaha Twin Tech cables

Are you sure it's "just a cable", I doubt it. Paralleling AC supplies is not like paralleling a couple of batteries. The 2 supplies must be synchronised so that the alternating cycles are occurring at the same time and the voltages are the same. If they are not you can cause serious damage. Being inverter out puts, I am guessing one inverter becomes the master which controls the the inverter process in both generators. I've noticed the Honda units have a"box" between the two input plugs.

Be very carefull

Do some research with Google.

The Honda cables cost way too much from Honda but there are online stores in the US who sell them for some very fair prices including postage.

I'm not familiar with the Yamaha set-up but the Honda parallel cabling is just two pieces of copper wire with a shrouded plug on each end for the 10i. For the 20i they are the same electrically with a plain old junction box in the middle of the cable with an outlet mounted on it.

Do you have the manual for the Yamaha?
If it goes to the detail the Honda does it quite clearly shows all they do is parallel the AC output and let the machines "talk" inverter to inverter to balance the load.

As I said, I'm not familiar with the Yamaha machine but I can't see why they'd be significantly different to the Honda system.

The only thing "special" about the interconnecting cable for parallel operation is that the plugs at each end are of a shrouded construction such that human contact cannot be made with the live contacts on either the plug or the socket. They simply connect the inverter outputs in parallel, however the inverters are designed to accommodate this. There is no separate "synchronous trigger" connection.


Machine phasing is achieved by firstly connecting the cable then starting each machine in turn. As the second machine comes up to speed & voltage it falls into synchronisation. The pair of alternators have specifically designed characteristics to enable this and to remain in synchronisation.


The alternate product is a "Paralleling Kit" which is as above but with a "box in the middle of the cable" which contains an outlet socket allowing the aggregate power to be supplied to a single load.


I would leave it to someone skilled in marketing to comment on the apparent high price of the paralleling cable product.

Are your generators still under warranty?
If so, and you damage them with non Yamaha cables, then....warranty kaput.

The "Parallel operation connection ports" on my Honda EU20i take 4mm shrouded banana plugs.. (and yes, I made my own connecting cable)..

I'm fairly sure (but not 100% certain) that Yamaha use the same type plugs/sockets...

The plugs are readily available from Jaycar


:)

Found this on ebay >

Silicone test leads w/- Shrouded Banana Plugs at each end

Can't see why this wouldn't work.. Certainly with Hondas, not sure about Yammy,
(until someone can confirm what jacks they use)...

Comments, anyone?


:)