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N8GS's avatar
N8GS
Explorer
Jul 18, 2017

Honda and onboard PSW inverter?

Many inverter generators will sync up and run in parallel. As I understand it you start the first generator and then the second one sync's to it when started. My question is - could this work with an onboard 2000 watt PSW inverter and a 2000 watt Honda generator. I'm thinking that if it is possible it would work well for load sharing when starting the AC, eliminating the need for a second generator.
Has anyone tried this? Did it work or did it let the smoke out.
  • yes, i know, and i hope the OP understands
    your 3-way sync box, was just a thought, for describing, a 2-way hookup
    possibly using the inverter and one honda
    personally i think, its too much work and too little gain, and a bit chancey
    might toast both the inverter and the generator
  • The posts above exhibit knowledge I cannot comment on.

    But, even if it somehow should work, will you leave the inverter on, sharing the running load? If not, a single 2kw will be working very hard and very loud. If so, the load will be presumably shared, and you better have a lot of batteries or generous solar helping out.

    I'm not trying anything like that.
  • Thank you road-runner.
    Hmmm. fascinating about the Honda utilization of finals. The generator would therefore have to shake hands with the inverter meaning agree to accept inverter waveform. From that point on I can only offer conjecture and hypothesis. That and "three bucks at Starbucks" time...

    However out of phase mis-synchronization tends to get hair-raising here comes the fire truck time...
  • MEXICOWANDERER wrote:
    I may be wrong but is there a primary (alpha) and a Beta principle in inverter generator synchronization? They do not use the finals as a reference signal do they? Using finals would be risky interconnect cord vulnerability wise. If they use an intermediate signal, where and how would a person tap into an inverter circuit to find a readable signal? Heavy emphasis on doubt...
    Honda and Yamaha use finals. Champion, I think, uses intermediate. Kipor originally used finals then switched to intermediate after Honda sued them. I'm noticing a number of newer "off brands" using finals. Makes me wonder if either the patent has run out or if they're paying royalties. The gist of the Honda patent is that a unit in the slave mode compares the phase of the current and voltage waveforms, using the result to adjust the frequency.
  • I think we should get MEX to test my idea, but using his money and equipment of course.

    This whole idea is one of those things where you wake up at 3AM from a dream thinking, what if.
  • in practice
    you would have to turn on the inverter first, so the Honda could sync
    as the avg PSW inverter does not have syncing ability

    the honda would have be attached at the output side of the inverter feeding the RV and A/C, Not the shore cord the inverter would be the primary (Not the Honda)
    it would always be online using battery
    you would need a charger/converter powered by another circuit ? to maintain the batteries

    you could maybe make up a syncing connection harnes box like 2oldman and his three hondas, plug inverter into that, NOT to the RV house circuits
    then plug shore cord into the honda output


    in other words it might be doable, but it really is a PAIN, just to attempt this

    if you get a magnum combo inverter or a victron inverter
    yes those should provide temporary load support to any good clean 120v ac input power
  • Not the first to ask this question. Never read a post where someone was brave enough to do it. I have my doubts the Honda voltage regulation would work well with a battery/inverter as the Honda is designed to let voltage sag a bit to trigger ramping up power.
  • I may be wrong but is there a primary (alpha) and a Beta principle in inverter generator synchronization? They do not use the finals as a reference signal do they? Using finals would be risky interconnect cord vulnerability wise. If they use an intermediate signal, where and how would a person tap into an inverter circuit to find a readable signal? Heavy emphasis on doubt...

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