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Forum Index : Solar : 3 Phase inverters.

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Davo99
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Joined: 03/06/2019
Location: Australia
Posts: 1582

Posted: 09:54pm 31 Oct 2019

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Got a good idea what the answer is likely to be but I live to be surprised.....

With 3 phase inverters, is there any setting / way to make them feed into just 2 phases?

I have noticed these coming up from time to time and they go quite cheap and often don't seem to sell anyway. If i could get a 10kw unit and have it produce 6.6 KW or 3.3 on one phase and 6.6 on another, that would be good.

Guessing they want to see input and frequency from all 3 phases before they hook up.

Don't spose it's Possible to do a C2c type Job with a cap and make one leg think it's connected to a 3rd phase?

Warpspeed
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Joined: 09/08/2007
Location: Australia
Posts: 4406

Posted: 10:38pm 31 Oct 2019

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Don't really know for sure Dave.

If its a genuine three phase off grid inverter, or three phase UPS, it should be capable of running with very large phase imbalance, it would be pretty useless otherwise.
Most likely three separate individual inverters joined at the hip.

On the other hand, a three phase purpose designed grid tie inverter is very likely to spit the dummy and refuse to work without all three phases being able to work back into a fully functional three phase grid connection.
Edited 2019-11-01 09:07 by Warpspeed

Cheers, �Tony.

Davo99
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Joined: 03/06/2019
Location: Australia
Posts: 1582

Posted: 11:26pm 04 Nov 2019

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Warpspeed said

On the other hand, a three phase purpose designed grid tie inverter is very likely to spit the dummy and refuse to work without all three phases being able to work back into a fully functional three phase grid connection.

Given all the protection and checks built into single phase inverters, that's pretty much what I suspected.

If I ever find one REALLY cheap I might get it to try but then I suspect one may work and another would not.

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